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• Bill for toll service and telegrams from July 17th - August 13th for $6.22. [Filed under LP Biographical: Business and Financial: (Assorted Bills, Receipts and Invoices, 1951-1962.), Box #4.060, Folder #60.1]
• Bill from the Adohr Milk Farms, Inc. to LP for $18.92. [Filed under LP Biographical: Business and Financial: (Assorted Bills, Receipts and Invoices, 1951-1962.), Box #4.060, Folder #60.1]
• Pamphlet: “The Committee for Peaceful Alternatives: what it is, what it does,” Committee for Peaceful Alternatives, July 1951. [Filed under LP Peace: (Assorted Peace Groups. (Co-Ev)), Box #4.011, Folder #11.1]
• Report, Symbols for Physical Chemistry and Thermodynamics, by the Subcommittee on Physico-Chemical Symbols and Terminology of the Committee on Physical Chemistry of the National Research Council. [Filed under LP Science, (National Research Council, 1950-1992), Box #14.028, Folder #28.1]
• Tax Withholding Statement from The Regents of the University of Michigan to LP for $125.00. [Filed under LP Biographical: (Business and Financial: Tax Documents, 1930-1956), Box #4.001, Folder #1.6]

• Bill from the Pasadena Pool Maintenance Co. to AHP for $25.00. Handwritten note: “Pd July 12.” [Filed under LP Biographical: Business and Financial: (Assorted Bills, Receipts and Invoices, 1951-1962.), Box #4.060, Folder #60.1]
• Handwritten note from Peter Pauling to his parents and siblings, RE: Explains that he arrived there the day before after a hectic week, and explains his week of traveling. Informs them that he is working on ion movement in nerves using Na and K tracers. Tells them that the food is good, but that the room is smaller than their bedrooms. Apologizes from mashing LP’s car. Says that Irving Klotz will give three lectures on proteins that week. [Filed under LP Biographical: Personal & Family: )Family Correspondence: Peter Jeffress Pauling, 1939-1953.), Box #5.041, Folder #41.4]

  July 1, 1951

  Dear Parents and Siblings,

  I arrived here yesterday after a rather hectic week. We left Friday night and drove twenty-four hours a day through New Orleans to Washington D.C. We stayed with the Condon's, since the Robertson's had gone for a walk when we arrived, I called Loyd and Sylvia and talked a bit. Wednesday I rode the train to New York. Grundfest welcomed me and the Minsky's are in Europe. I stayed for three nights with Mrs. Stowe. I went to New York everyday and saw Henry Allen Moe and Rose Sherman. I bought some clothes. Grundfest is a nice guy, Nachmansohn is a German, and I do not know him very well. I am working on ion movement in nerves using tracers, Na⁺ and K⁺. Squid nerves are used, the giant axon, but the squid are not available right now. Woods Hole is foggy tonight, as it was last night, and it rained today. I hear the weather has not been wonderful but a little dull so far.

  The food is good and also plentiful. As much as you want for $14 weekly. The room is smaller than our bedrooms, has three bunk beds (for six occupants) but we have only four right now.

  I am sorry, Daddy, that I mashed up your car.

  Irving Klotz will give three lectures on proteins this week.

  Much love,

  Peter

• Note from Makisaburs Ogasawara to LP RE: Encloses the translation of one of LP’s books into Japanese. Ogasawara encloses a manuscript entitled, “Exercises in Quantum Mechanics,” and asks LP to estimate the solution to each problem. [Letter from LP to Ogasawara, August 6, 1951] [Filed under LP Correspondence: (O: Correspondence, 1951), #300.13]
• Report: The Status of the Values of Fundamental Constants for Physical Chemistry as of July 1, 1951, National Research Council, Division of chemistry and Chemical Technology, Committee on Physical Chemistry, by the subcommittee on Fundamental Constants. [Filed under LP Science:(National Research Council, 1950-1992), Box #14.028, Folder #28.1]
• Statement from LP to Mira Loma Mutual Water Co.: Provides them with water meter readings for LP’s Property, corresponding to a $15.44 bill. Handwritten note: “Pd.” [Filed under LP Biographical: Business and Financial: (Assorted Bills, Receipts and Invoices, 1951-1962.), Box #4.060, Folder #60.1]

• Letter from Kosuke Ohki, Research Institute of Science and Industry, to LP RE: Asks LP to send an article from the Proceedings of the Royal Society A, 1949, 196, 343 and includes his own report. [Letter from LP to Ohki, August 20, 1951] [Filed under LP Correspondence: (O: Correspondence, 1951), #300.13]
• Letter from LP to Joseph L. Egan, Western Union Telegraph Co., RE: Asks for better service in Pasadena. Also asks for explanations of recent instances of bad service. [Filed under LP Correspondence: (W: Correspondence, 1951), #443.19]
• Letter from LP to Roger Hayward RE: Asks for a drawing of the pattern of waves set up by a bee that has fallen onto the surface of a pond for comparing phase differences and diffraction patterns. [Filed under LP Correspondence: (Hayward, Roger), #152.9]
• News Release: “The Theory of Resonance in Chemistry”, Caltech News Bureau, July 2, 1951. [Filed under LP Science: (Materials re: Resonance Theory Controversy, 1949-1983), Box #2.003, Folder #3.5]
• Typescript: Structure of Alloys with about 160 Atoms in the Unit Cube, July 2, 1951. [Filed under LP Manuscripts of Articles: 1951a2.6]

• Bill from the John C. Mehan Company to AHP for $4.80. [Filed under LP Biographical: Business and Financial: (Assorted Bills, Receipts and Invoices, 1951-1962.), Box #4.060, Folder #60.1]
• Letter from E. J. Ambrose, Research Laboratory, Courtaulds Limited, to LP RE: Includes a lengthy discussion of synthetic polypeptides and proteins in which he responds to LP’s questions. Gives his thoughts on LP’s papers on the α- helix as a model for folded synthetic poplypeptides and α-keratin. States that they are very glad to be in communication with LP on this subject. [Letter from LP to Ambrose, May 7, 1951] [Letter from LP to Ambrose, July 11, 1951] [Filed under LP Correspondence: (A: Correspondence, 1951), #12.17]
• Letter from James B. Conant to Mr. Bengelsdorf RE: Returns translation “The Present State of the Chemical Structural Theory”. Says he does not blame the editor of Chemical and Engineering News for reluctance to publish the article because it would be misunderstood by the majority of the readers. If he hears of a suitable place for publication he will send it on. [Filed under LP Science: (Materials re: Resonance Theory Controversy, 1949-1983), Box #2.003, Folder #3.1]
• Letter from R. Vernon Jones, Treasurer, Northeast Oklahoma Section, American Chemical Society, to LP, RE: Encloses the check, and thanks him for his lecture. [Letter from Pitzer to LP, June 27, 1951] [Letter from LP to Jones, July 10, 1951] [Filed under LP Science: (American Chemical Society: Correspondence, 1950-1964), Box #14.006, Folder #6.4]
• Note from R. R. Newell, Department of Radiobiology, Stanford University School of Medicine, to LP RE: Asks if his son was able to see LP. [Filed under LP Correspondence: (N: Correspondence, 1951), #287.18]

• Letter from Garnet T. Page, General Manager, Chemical Institute of Canada, to LP RE: Asks if LP would be able to visit during the 1951-52 season. [Letter from LP to Page, March 29, 1951] [Letter from LP to Page, July 10, 1951] [Filed under LP Correspondence: (P: Correspondence, 1951), #312.16]

• Bill from Fashion Cleaners to LP for $16.90. Handwritten note: “Pd.” [Filed under LP Biographical: Business and Financial: (Assorted Bills, Receipts and Invoices, 1951-1962.), Box #4.060, Folder #60.1]
• Check from AHP to Sue Perry for $10.00. [Filed under LP Biographical: (Business and Financial: Bank Statements and Canceled Checks, September 1950-December 1952), Box #4.021, Folder #21.2]
• LP Note to Self: “Biological Specificity - Pesticides, etc.”, July 5, 1951. [Filed under LP Science: (Research on Biological Specificity, 1930-1967), Box #8.001, Folder #1.9]
• Letter from Charles Gerry, Attorney, to Friend RE: Encloses a reprint of an advertisement which was printed in the New York Times and the San Francisco Chronicle, as well as a statement signed by a number of community leaders in the San Francisco area. States that the materials discuss issues which are important to people’s civil liberties and urges people to have the ad reprinted in their local newspapers. [Filed under LP Correspondence: (G: Correspondence, 1951), #140.15]
• Letter from Hans Neurath, Chairman of the Department of Biochemistry, University of Washington School of Medicine, to John C. Kendrew, Cavendish Laboratory, cc. LP RE: Discusses Kendrew’s itinerary and states that LP will contact him before he leaves England. [Letter from Neurath to LP, July 5, 1951] [Filed under LP Correspondence: (Neurath, Hans), #276.8]
• Letter from Hans Neurath, Chairman of the Department of Biochemistry, University of Washington School of Medicine, to LP RE: Says that he is sorry to cancel his trip to Los Angeles. Encloses a letter to Dr. Kendrew and encourages LP to help Kendrew prepare his itinerary. [Letter from Neurath to Kendrew, July 5, 1951] [Letter from LP to Neurath, July 10, 1951] [Filed under LP Correspondence: (Neurath, Hans), #276.8]
• Letter from Harrison Brown, Institute for Nuclear Studies, University of Chicago, to LP RE: Says that he is considering accepting a position at Caltech but that there are still a number of points yet to be settled. States that LP’s “kind letter made the pendulum move considerably further in the western direction.” [Letters from LP to Harrison, June 25, 1951] [Letters from LP to Harrison, July 10, 1951] [Filed under LP Correspondence: (Brown, Harrison), #32.4]
• Letter from Henry Allen Moe, John Simon Guggenheim Memorial Foundation to LP RE: Notifies him that Dr. Nelson Smith has decided to accept his fellowship for a full year instead of nine months as recommended by LP. [Filed under LP Science: (John Simon Guggenheim Memorial Foundation, 1946-1952), Box #14.014, Folder #14.6]
• Letter from James A. Shotton, Department of Chemistry, Oklahoma Agricultural and Mechanical College, to LP RE: Says that he has mailed copies of the reports of the committees from the General Chemistry Workshop, including the photographs he ordered. [Letter from LP to Shotton, July 1, 1951] [Filed under LP Correspondence: (S: Correspondence, 1951), #378.5]
• Letter from LP to Frances V. Benner, American Chemical Society, RE: Writes that he thinks it would be wise to put off his mid-west tour until 1952-53 and not bother Dr. Mellon about changing his dates. [Letter from Benner to LP, June 22, 1951] [Letter from Benner to LP, July 10, 1951] [Filed under LP Science: (American Chemical Society: Correspondence, 1950-1964), Box #14.006, Folder #6.4]
• Letter from LP to Frank Hovorka, Chairman of the Department of Chemistry, Western Reserve University, RE: Concerns Gippen’s interest in finding a job related to organic chemistry, asking if he is suitable for employment. [Letter from Hovorkato to LP, July 10, 1951] [Filed under LP Correspondence: (G: Correspondence, 1951), #140.15]
• Letter from LP to Garman Harbottle RE: States that he is glad that Harbottle is going to receive a postdoctoral fellowship from University of Cambridge. [Letter from Harbottle to LP, June 29, 1951] [Filed under LP Correspondence: (H: Correspondence, 1951), #166.2]
• Letter from LP to Hans Klapper RE: Answers his questions and recommends that he obtain a his Ph.D. in chemistry when he comes to the U.S. [Note from Klapper to LP, June 25, 1951] [Filed under LP Correspondence: (K: Correspondence, 1951), #200.16]
• Letter from LP to K.N. Rudall thanking him for the x-ray photograph of the fibrin material. [Reply to Rudall June 22, 1951] [Filed under LP Correspondence: (R: Correspondence, 1951), #344.16]
• Letter from LP to Morris Gippin, RE: Offers some suggestions as to why he might be having trouble finding a job in organic chemistry. [Letter from Gippin to LP July 29, 1951] [Filed under LP Correspondence: (G: Correspondence, 1951), #140.15]
• Letter from LP to Mr. Shumichi Kimura, Associated Students of the University of Hawaii, RE: Thanks him for his letter and says that it was a great pleasure for him and AHP to be in Hawaii. Says that he hopes they can come again and be able to speak to the students of the University, rather than just to the Chemistry Club. [Filed under LP Biographical: Political Issues: (Correspondence re: University of Hawaii, 1950-1954.), Box #2.005, Folder #5.3]
• Letter from P. S. Robertson, Special Service Department, Fischer Scientific Company, to LP RE: At the request of Dr. D. G. Nicholson, sends him reprints of “Careers in Chemistry and Chemical Engineering.” [Letter from LP to Robertson, July 10, 1951] [Filed under LP Correspondence: (F: Correspondence, 1951), #128.16]
• Note from Melba Phillips, Secretary, American Association of Scientific Workers, to LP RE: Forwards LP the cable about the WFScW meeting even though neither of them will probably attend. [Letter from LP to Phillips, July 10, 1951] [Filed under LP Peace: (Assorted Peace Groups (Am)), Box #4.009, Folder #9.1]

• Check from AHP to Ray K. Nakamura for $153.66. [Filed under LP Biographical: (Business and Financial: Bank Statements and Canceled Checks, September 1950-December 1952), Box #4.021, Folder #21.2]
• Letter from A. L. G. Rees, Australian Scientific Liaison Office, RE: Discusses arrangements to visit LP at Caltech on September 25, 1951. [Letter from LP to Rees, July 16, 1951] [Filed under LP Correspondence: (R: Correspondence, 1951), #340.16]
• Letter from D. P. Riley, Royal Institution, London, to LP RE: Congratulates LP on his protein papers and asks for reprints when they are available. Handwritten note: “I have noted this. B.W.” [Letter from LP to Riley, July 16, 1951] [Filed under LP Correspondence: (Riley, D. P.), #329.6]
• Letter from LP to Arthur B. Pardee, Virus Laboratory, University of California at Berkeley, RE: Provides his comments on Pardee’s paper and says that it should be a publication from Gates and Crellin Laboratories. [Letter from Pardee to LP, June 29, 1951] [Letter from Pardee to LP, July 9, 1951] [Filed under LP Correspondence: (Palmer, Kenneth J.), #304.3]
• Letter from LP to Henry Allen Moe, John Simon Guggenheim Memorial Foundation RE: Informs him that he is probably going to Jamaica in the fall and would be glad to look around the British West Indies for scholars to apply for fellowships. Explains why he is going to Jamaica. [Filed under LP Science: (John Simon Guggenheim Memorial Foundation, 1946-1952), Box #14.014, Folder #14.6]
• Letter from LP to James Winston RE: Replies that he believes Winston’s letter of June 26, 1951 was sent to him by mistake. Suggests that Winston may have confused the Bulletin of Atomic Scientists with the Federation of Atomic Scientists. [Letter from Winston to LP, June 26, 1951] [Letter from Winston to LP, July 11, 1951] [Filed under LP Correspondence: (W: Correspondence, 1951), #443.19]

• Handwritten note from Peter Pauling to the Pauling family, RE: Discusses the physiology lectures and talks by Stephen Kuffler and Irving Kloty that he has attended. Tells them that he has seen Max Delbruck and Bruce Ames and that he went to a square dance the last Thursday, but didn’t enjoy it. Explains to Crellin that it may be necessary to use spacers between the hub and the wheel and draws a diagram. Asks why his parents have not visited him yet and says that Grundfest would like LP to give a talk if he comes to the August ACS meeting. [Filed under LP Biographical: Personal & Family: (Family Correspondence: Peter Jeffress Pauling, 1939-1953.), Box #5.041, Folder #41.4]

  July 7^th, 1951

  Dear Family,

  The week has gone fairly well, though we have not yet begun really to work. The squid are not running, and we shall begin on frog nerves on Monday. The electrical apparatus is set up and works well.

  It is very nice here. It was dark yesterday, but otherwise the weather was warm and I have swum every day. So far I have not worked terribly hard. I have gone to the physiology course lectures every day. Stephen Kuffler has given a couple of interesting talks and Irving Kloty gave three on proteins. He seems very impressed with the theory according to students who have asked him. He mentioned Pauling and Ambross different structures but emphasized Pauling's helices and muscle contraction. I do not think he knows I am here.

  Max Delbruck was here yesterday. I talked with him for a while. I have seen Bruce Ames often. He is an excellent folk dancer. I went to a square dance Thursday night, but did not particularly enjoy it. People I think consider me odd due to sandals (with socks,), short trousers, and the beard. I get along pretty well though. It is imperative to take a lot of kidding.

  I am waiting for G.H.A Clowes to come back. I probably shall not see him until Monday, though. I wonder if he has a boat? I have not been in one yet.

  I have not yet had lobster. I must b[u]y one. The cost $0.50 a pound, I think.

  Oh, Crellin, it may be necessary to use spacers between the hub and the wheel. These are washers put on the five bolts before the wheel is put on to support the wheel. If not used, you will break wheels. You can buy them at Blair's probably or make them. Do not use makeshift spacers. George Andrew would make them for you. Use steel rod or iron, not brass,

  [here is a picture " or bolt Diameter

  of a Washer]

  necessary width. You must measure.

  You can get advise easily.

  I now have my full allotment of five roommates. We get along reasonably well, as far as interference during waking and sleeping hours.

  Oh Parents, if you come east why do you not come see me? I would like very much to see you. Grundfest would like you to give a talk if you come to the August ACS meeting to the Association of Scientific Workers or something. On Academic Freedom or what you will.

  Lunch Calls-

  Much love,

  Peter

• Letter from Gerson Kegeles to LP RE: At the suggestion of Dr. Campbell, writes to LP about the vacancy at the Institute, created by Dr. Singer’s leaving. Mentions the possibility of meeting with LP if Kegeles is able to visit San Francisco this summer. Discusses his experience and research projects. [Letter from LP to Kegeles, July 31, 1951] [Filed under LP Correspondence: (K: Correspondence, 1951), #200.16]
• Letter from James B. Conant to Senior RE: States he thinks the Journal of Chemical Education would possibly publish the translation of a Russian article. [Filed under LP Science: (Materials re: Resonance Theory Controversy, 1949-1983), Box #2.003, Folder #3.1]
• Letter from John Herman to LP RE: Discusses some issues in his book with which LP disagrees. [Letter from LP to Herman, June 29, 1951] [Filed under LP Correspondence: (H: Correspondence, 1951), #166.2]
• Letter from Joseph Capsin to LP RE: Thanks LP for the fine letter. States that he hopes Senator Humphrey will be available during LP’s trip to Washington D.C. and that LP will not regret having met him. Encloses his correspondence with Senator Humphrey [Letter from LP to Capsin, July 7, 1951] [Filed under LP Correspondence: (Capsin, Joseph), #57.9]
• Letter from Joseph Ferrante to LP RE: [Written in French] States that he likes LP’s textbook, General Chemistry, but expresses confusion about his discussion of cyanruic triazide. Asks for LP’s clarification in this matter. [Letter from LP to Ferrante, July 30, 1951] [Filed under LP Correspondence: (F: Correspondence, 1951), #128.16]
• Letter from Senator Hubert H. Humphrey to LP RE: States that he was pleased to receive LP’s letter and that he would be honored and delighted if LP visited him. States that it was thoughtful of their mutual friend, Joe Capsin, to bring them together by correspondence. [Letter from LP to Humphrey, June 25, 1951] [Filed under LP Correspondence: (Humphrey, Hubert H.), #163.5]
• Manuscript Notes, Diagram: “The Structure of the Silk Fibroin”, July 7, 1951 - April 4, 1952. [Filed under LP Science: (Materials re: The Structure and Properties of Proteins, 1935-1953), Box #6.001, Folder #1.13]

• Letter from C. E. Stanfield, to Caltech Department of Chemistry RE: Asks for information about the hard-chrome process of treating steel. [Letter from LP to Stanfield, July 18, 1951] [Filed under LP Correspondence: (S: Correspondence, 1951), #378.5]
• Letter from Frank H. Dickey to LP RE: Asks about the gel samples, and says that the summary of gene duplication or protein synthesis will be ready in a few weeks. Dickey has accepted a position at UC Berkeley for next year. [Letter from LP to Dickey, July 17, 1951] [Filed under LP Correspondence: (D: Correspondence, 1951), #98.16]

• Check from AHP to Linda Pauling for $40.00. [Filed under LP Biographical: (Business and Financial: Bank Statements and Canceled Checks, September 1950-December 1952), Box #4.021, Folder #21.2]
• Check from LP to James A. Shotton for $6.75. [Filed under LP Biographical: (Business and Financial: Bank Statements and Canceled Checks, September 1950-December 1952), Box #4.021, Folder #21.2]
• LP Note to Self: “Biological Specificity - Taste and Molecular Shape”, July 9, 1951. [Filed under LP Science: (Research on Biological Specificity, 1930-1967), Box #8.001, Folder #1.10]

  July 9, 1951

  Memo to Linus Pauling from Himself

  BIOLOGICAL SPECIFICITY

  Taste and Molecular Shape

  The SCIENTIFIC AMERICAN for July 1951 quotes the SCIENTIFIC AMERICAN for July 1851 as follows: "In 1846 Prof. Horsford of Harvard published a paper in which he called attention to the interesting relation between glycocol and the other sweet bodies - grape sugar, sugar of lead, etc. He appended the query, 'Is this similar taste dependent upon a similar arrangement of their minutest particles?' He has now published a pamphlet in which are enumerated, with their chemical formulae, a great number of substances to prove that such an arrangement does exist among bodies having a common taste."

• Letter [typed] from LP [Signed by Beatrice Wulf] to Otto Smith, Oklahoma A and M University RE: Encloses an expense report from the Workshop on General Chemistry Teaching. Also, requests to have the following year’s meeting at CIT in Pasadena [Filed under LP Travel: Box #1.001 Folder 1.9]
• Letter from A. F. Kudlacik, W. H. Freeman & Co., to LP RE: Sends LP two copies of the French edition of General Chemistry. [Filed under LP Books: 1947b6.2]
• Letter from Arthur Pardee, Virus Laboratory, University of California at Berkeley, to LP RE: Thanks him for his comments. [Letter from Pardee to LP, July 6, 1951] [Filed under LP Correspondence: (Palmer, Kenneth J.), #304.3]
• Letter from LP to G. F. Bell RE: Says that there is no English translation for the French text he seeks. Recommends similar books written in English. [Letter from Bell to LP, June 14, 1951] [Letter from Bell to LP, July 7, 1951] [Filed under LP Correspondence: (B: Correspondence, 1951), #37.18]
• Letter from LP to Gertrude C. Anderson RE: Says that he is glad she liked his article in Science Digest and agrees with her suggestion that science should be introduced in nursery school. Encloses an article on “The Significance of Chemistry to Men in the Modern World,” that formed the basis of the Science Digest article and a copy of a talk that he gave in the Royal Institution of Great Britain three years ago. [Filed under LP Correspondence: (A: Correspondence, 1951), #12.17]
• Letter from Virginia Proctor, Secretary to the President, to Professor Bengelsdorf RE: Asks for the name and date of publication of the translation returned previously. He would like bibliographical information helpful in identifying the original article. [Filed under LP Science: (Materials re: Resonance Theory Controversy, 1949-1983), Box #2.003, Folder #3.1]
• Memo from the Dean of the Faculty to President L. A. DuBridge, cc: LP, RE: Says that the recommendation made in the attached memorandum has his approval. [Filed under LP Biographical: Academia: (California Institute of Technology: Administrative Files, 1938-1971.), Box #1.030, Folder #30.8]

• Check from AHP to Pasadena Pool Maintenance Company for $25.00. [Filed under LP Biographical: (Business and Financial: Bank Statements and Canceled Checks, September 1950-December 1952), Box #4.021, Folder #21.2]
• Letter form LP to Prof. E.B. Wilson RE: Informs that he is sending an article entitled “Immunologic Adsorbents. I. Isolation of Antibody by means of a Cellulose- protein Antigen,” by D.H. Campbell, E. Luescher, and Leonard Lerman. [Filed under LP Science: (National Academy of Science, 1945-1951); Box #14.019, Folder #19.4]
• Letter from Frances V. Benner, Special Assistant, American Chemical Society, to LP, RE: Writes that they are sorry to hear he will not be able to tour the mid west sections of the American Chemical Society and appreciate his willingness to consider a tour in the academic year in 1952-53; perhaps he will be able to combine the mid west tour with one through the south. [Letter from LP to Benner, July 5, 1951] [Filed under LP Science: (American Chemical Society: Correspondence, 1950-1964), Box #14.006, Folder #6.4]
• Letter from Frank Hovorka, Chairman of the Department of Chemistry, Western Reserve University, to LP RE: Concerns employment for Morris Gippin. States that he knows that Gippin could do excellent work in organic chemistry if he is under the proper direction, but that he does not think that he will succeed as a leader in research. [Letter from LP to Hovorka, July 5, 1951 [Letter from LP to Hovorka, July 17, 1951] [Filed under LP Correspondence: (G: Correspondence, 1951), #140.15]
• Letter from Frederick D. Rossini, Chairman, Committee on Physical Chemistry, Division of Chemistry and Chemical Technology, National Research Council to Members of the NRC Committee on Physical Chemistry and its Subcommittees RE: Attaches a list of the members of the main committee as well as the subcommittees for the year beginning July 1, 1951.
• Letter from Harry Grundfest, Marine Biological Laboratory, College of Physicians and Surgeons, Columbia University, to LP RE: Asks LP if he will be attending the ACS meetings on the east coast and if he would be willing to give a talk under AAScW auspices at Woods Hole, towards the end of August. [Letter from LP to Grundfest, July 30, 1951] [Filed under LP Correspondence: (G: Correspondence, 1951), #140.15]
• Letter from James M. Crowe, Executive Editor, Chemical and Engineering News, to LP RE: Discusses the August 13th issue of C & EN which will commemorate the Diamond Jubilee of the American Chemical Society and the articles that will be included in the issue. Asks LP to make predictions in his field of interest or any subject of his choosing. Encloses some reprints of predictions made on other anniversary occasions. [Letter from LP to Crowe, July 18, 1951] [Filed under LP Correspondence: (Chemical and Engineering News), #70.3]
• Letter from LP to David M. Greenberg, Chairman of the Division of Biochemistry, School of Medicine, University of California at Berkeley, RE: Based on a meeting with Mr. Ronwin, summarizes principal points about a manuscript with information from meeting with Ronwin. [Letter from Greenberg to LP July 12, 1951] [Letter from Greenberg to LP June 21, 1951] [Filed under LP Correspondence: (G: Correspondence, 1951), #140.15]
• Letter from LP to Dr. Max Tishler, Merck and Co, RE: Asks if they would be interested in having Professor Dan H. Campbell talk about the recent developments in the plasma substitutes field when he is on his way East. States Professor Campbell has been effectively in charge of the oxypolygelatin work since its inception and emphasizes his belief it is better than the other substitutes. [Filed under LP Science: (Materials re: Oxypolygelatin Blood Plasma Substitute, 1945-1951), Box #6.003, Folder #3.3]
• Letter from LP to Dr. R. Vernon Jones, Treasurer, American Chemical Society, RE: Thanks him for his check and writes that he enjoyed his visit with the Northeast Oklahoma Section of the American Chemical Society. [Letter from Jones to LP, July 3, 1951] [Filed under LP Science: (American Chemical Society: Correspondence, 1950-1964), Box #14.006, Folder #6.4]
• Letter from LP to Garnet T. Page, General Manager, Chemical Institute of Canada, RE: Says that it is unlikely that he will be able to visit during the 1951-52 season. [Letter from Page to LP, July 4, 1951] [Filed under LP Correspondence: (P: Correspondence, 1951), #312.16]
• Letter from LP to Hans Neurath, Chairman of the Department of Biochemistry, University of Washington School of Medicine, RE: Says that he has invited Kendrew to visit the Institute, and that he has sent Neurath reprints of the protein papers. [Letter from Neurath to LP, July 5, 1951] [Filed under LP Correspondence: (Neurath, Hans), #276.8]
• Letter from LP to Harrison Brown, Institute for Nuclear Studies, University of Chicago, RE: Encourages Brown to accept a position in the Geology Division. Tells Brown not to turn down the offer before writing to him about matters that trouble him. Expresses his high opinion of the men in the Division of Geological Sciences and his own personal satisfaction with his work at Caltech. [Letter from Brown to LP, July 5, 1951] [Filed under LP Correspondence: (Brown, Harrison), #32.4]
• Letter from LP to John C. Kendrew, Cavendish Laboratory, Cambridge, RE: States that hopes that Kendrew will be able to visit Pasadena, and that they will be able to contribute $100 to his traveling expenses. [Letter from Kendrew to LP, July 14, 1951] [Filed under LP Correspondence: (Kendrew, John), #197.16]
• Letter from LP to Karl Bechert, Institut für theoretische Physik, Universität Mainz, RE: Thanks him for the invitation but declines. Discusses his current protein studies, his family, and the occasional times that he sees people who were in Sommerfeld’s Institute. [Letter from Bechert to LP, June 29, 1951] [Letter from Bechert to LP, September 24, 1951] [Filed under LP Correspondence: (B: Correspondence, 1951), #37.18]
• Letter from LP to Melba Phillips, Secretary, American Association of Scientific Workers, RE: Thanks her for sending the cable. States that he is trying to rest this summer after a rather strenuous winter and spring. Writes that he hopes that he will not have to leave Pasadena until September when he will travel to New York to attend the ACS meeting and the International Congress of Pure and Applied Chemistry. [Note from Phillips to LP, July 5, 1951] [Filed under LP Peace: (Assorted Peace Groups (Am)), Box #4.009, Folder #9.1]
• Letter from LP to P. S. Robertson, Special Service Department, Fisher Scientific Company, RE: Thanks him for sending the reprints of “Careers in Chemistry and Chemical Engineering.” States that he is pleased that Dr. Nicholson passed his request onto Dr. Robertson. [Letter from Robertson to LP, July 5, 1951] [Filed under LP Correspondence: (F: Correspondence, 1951), #128.16]
• Letter from LP to Roger Hayward RE: Asks him to make him another polyhedron, and gives directions. [Filed under LP Correspondence: (Hayward, Roger), #152.9]

• Check from AHP to Adhor Milk Farms for $13.93. [Filed under LP Biographical: (Business and Financial: Bank Statements and Canceled Checks, September 1950-December 1952), Box #4.021, Folder #21.2]
• Check from AHP to Athenaeum for $4.80. [Filed under LP Biographical: (Business and Financial: Bank Statements and Canceled Checks, September 1950-December 1952), Box #4.021, Folder #21.2]
• Check from AHP to Bullocks Pasadena for $96.85. [Filed under LP Biographical: (Business and Financial: Bank Statements and Canceled Checks, September 1950-December 1952), Box #4.021, Folder #21.2]
• Check from AHP to C.E. Eminger for $10.72. [Filed under LP Biographical: (Business and Financial: Bank Statements and Canceled Checks, September 1950-December 1952), Box #4.021, Folder #21.2]
• Check from AHP to Chadwick School for $14.70. [Filed under LP Biographical: (Business and Financial: Bank Statements and Canceled Checks, September 1950-December 1952), Box #4.021, Folder #21.2]
• Check from AHP to Dr. James Howe Britton for $4.00. [Filed under LP Biographical: (Business and Financial: Bank Statements and Canceled Checks, September 1950-December 1952), Box #4.021, Folder #21.2]
• Check from AHP to Fashion Cleaners for $16.90. [Filed under LP Biographical: (Business and Financial: Bank Statements and Canceled Checks, September 1950-December 1952), Box #4.021, Folder #21.2]
• Check from AHP to Hayne Heating Services for $7.94. [Filed under LP Biographical: (Business and Financial: Bank Statements and Canceled Checks, September 1950-December 1952), Box #4.021, Folder #21.2]
• Check from AHP to Mira Loma Mutual Water Company for $15.44. [Filed under LP Biographical: (Business and Financial: Bank Statements and Canceled Checks, September 1950-December 1952), Box #4.021, Folder #21.2]
• Check from AHP to National Sharecroppers Fund, Inc for $5.00. [Filed under LP Biographical: (Business and Financial: Bank Statements and Canceled Checks, September 1950-December 1952), Box #4.021, Folder #21.2]
• Check from AHP to Pacific Telephone and Telegraph for $14.58. [Filed under LP Biographical: (Business and Financial: Bank Statements and Canceled Checks, September 1950-December 1952), Box #4.021, Folder #21.2]
• Check from AHP to Richfield Oil Company for $14.25. [Filed under LP Biographical: (Business and Financial: Bank Statements and Canceled Checks, September 1950-December 1952), Box #4.021, Folder #21.2]
• Check from AHP to Southern California Edison Company for $21.50. [Filed under LP Biographical: (Business and Financial: Bank Statements and Canceled Checks, September 1950-December 1952), Box #4.021, Folder #21.2]
• Check from AHP to Southern Counties Gas Company of California for $14.49. [Filed under LP Biographical: (Business and Financial: Bank Statements and Canceled Checks, September 1950-December 1952), Box #4.021, Folder #21.2]
• Check from AHP to The American Indian Fund for $5.00. [Filed under LP Biographical: (Business and Financial: Bank Statements and Canceled Checks, September 1950-December 1952), Box #4.021, Folder #21.2
• Check from AHP to Union Oil Company of California for $4.21. [Filed under LP Biographical: (Business and Financial: Bank Statements and Canceled Checks, September 1950-December 1952), Box #4.021, Folder #21.2]
• Check from LP to Current Research for $5.00. [Filed under LP Biographical: (Business and Financial: Bank Statements and Canceled Checks, September 1950-December 1952), Box #4.021, Folder #21.2]
• Letter from Beatrice Wulf, Executive Secretary, Gates and Crellin Laboratories, to D. C. Martin, Assistant Secretary, Royal Society, RE: Requests that a copy of the Charter Book and its supplement be sent to LP. [Filed under LP Correspondence: (The Royal Society), #339.7]
• Letter from Dr. Edmund L. Keeney, San Diego County Medical Society, to LP RE: Tells LP that they have decided to invite the Women’s Auxiliary of their County Medical Society to the October meeting. Asks LP to tailor his talk to this mixed audience, and discusses the meeting format. [Letter from LP to Keeney, July 16, 1951] [Filed under LP Speeches: 1951s.17]
• Letter from James Winston to LP RE: States that he understood them to be parallel activities. Expresses his dissatisfaction with the management of the Bulletin of Atomic Scientists and Federation of Atomic Scientists, and asks LP to take positive action to correct managerial ills. [Letter from LP to Winston, July 6, 1951] [Letter from LP to Winston, July 17, 1951] [Filed under LP Correspondence: (W: Correspondence, 1951), #443.19]
• Letter from LP to Christopher Gregory, Department of Mathematics University of Hawaii, RE: Asks Dr. Gregory to consider the following points, raised by Professor Epstein, about his manuscript. Comments on his manuscript and Dr. Epstein’s comments.. [Letter from Gregory to LP, July 14, 1951] [Filed under LP Correspondence: (G: Correspondence, 1951), #140.15]
• Letter from LP to E. J. Ambrose, Research Laboratory, Courtaulds Limited, RE: Expands on a discussion about the structure of synthetic polypeptides. [Letter from Ambrose to LP July 3, 1951] [Filed under LP Correspondence: (A: Correspondence, 1951) #12.17]
• Letter from LP to James A. Shotton, Department of Chemistry, Oklahoma Agricultural and Mechanical College, RE: Encloses a check for the photographs that he received. [Letter from Shotton to LP, July 5, 1951] [Filed under LP Correspondence: (S: Correspondence, 1951), #378.5]
• Memo from LP to Contracts Committee RE: Recommends approval of the Task Order from the Navy. Describes briefly the research and who will be the immediate supervisor on the project. Includes copies of the proposed task order and copies of this memo. Notes on the copies list corrections that should be made and how many copies need to be sent. [Memo from Walter to LP June 29, 1951] [Memo from Walter to LP July 17, 1951] [Filed under LP Science: (Office of Naval Research: Correspondence, Contract Status Reports and Project Status Reports, 1947-1962), Box #14.031, Folder #31.5]

• Check from AHP to Aletha Courtney for $31.15. [Filed under LP Biographical: (Business and Financial: Bank Statements and Canceled Checks, September 1950-December 1952), Box #4.021, Folder #21.2]
• Check from AHP to Kukhams for $53.65. [Filed under LP Biographical: (Business and Financial: Bank Statements and Canceled Checks, September 1950-December 1952), Box #4.021, Folder #21.2]
• Check from AHP to Reed College for $50.00. [Filed under LP Biographical: (Business and Financial: Bank Statements and Canceled Checks, September 1950-December 1952), Box #4.021, Folder #21.2]
• Letter from David M. Greenberg, Chairman of the Division of Biochemistry, School of Medicine, University of California at Berkeley, to LP RE: Thanks LP for his time working with Mr. Ronwin and him on their manuscript. [Letter from LP to Greenberg, July 10, 1951] [Filed under LP Correspondence: (G: Correspondence, 1951), #140.15]
• Letter from Frederick Seitz, Department of Physics, University of Illinois, to LP RE: Invites LP to attend a meeting in Chicago entitled, “Conference on the Optical and Electrical Properties of the Ionic Crystals.” [Letter from LP to Seitz, July 20, 1951] [Filed under LP Correspondence: (S: Correspondence, 1951), #378.5]
• Memo from LP to himself RE: Writes thought about the paper by AJP Meyer and P Thelang on the ferromagnetism of the phase B1 of the cobalt-zinc alloys. [Filed under LP Science: (LP Notes to Self: Scientific, 1941, 1945, 1949-1992), Box #10.003, Folder #3.4]
• Note from J. S. McKinley McKee, Physical Chemistry Department, University of Cambridge, to LP RE: Inquires about the possibility of working in the United States next year on an application of physical chemistry to a biological problem. [Letter from LP to McKinley, July 23, 1951] [Filed under LP Correspondence: (M: Correspondence, 1951), #256.2]

• Check from AHP to Sue Perry for $30.00. [Filed under LP Biographical: (Business and Financial: Bank Statements and Canceled Checks, September 1950-December 1952), Box #4.021, Folder #21.2]
• Letter from Robert S. Mulliken, University of Chicago, to Members of the Conference on Quantum-Mechanical Methods in Valence Theory. [Letter from LP to Mulliken July 30, 1951] [Filed under LP Correspondence: (Mulliken, Robert) #251.1]

  July 13, 1951

  Members of the Conference on

  Quantum-Mechanical Methods In Valence Theory

  to be held Sept. 8-10, 1951 at

  Ram's Head Inn, Shelter Island

  Long Island, New York

  Gentlemen:

  Those listed below have accepted invitations to the Conference (a few others have not yet given a final answer):

  C. A. Coulson

  P.O. Lowdin

  R. Daudel

  H. Margenau

  M. Kotani

  J.E. Mayer

  J.E. Lonnard-Jones

  R.S. Mulliken

  H.C. Longuet-Higgins

  R.G. Parr

  W. Moffitt

  C.C.J. Roothaan

  T.H. Berlin

  J.C. Slater

  B.H. Crawford, Jr.

  C.W. Ufford

  H. Eyring

  J.H. Van Vleck

  J.O. Hirschfelder

  G.W. Wheland

  G.E. Kimball

  The following agenda are proposed tentatively:

  Sat. A.M. Valence theory; general (o.g. bond energies, hybridization, d orbitals, etc), and calculations by valence bond methods.

  Sat. P.M. Valence theory: calculations by molecular orbital methods (semi-empirical; self-consistent-field; best MO).

  Sun, A.M. Better wave functions and energies for atoms and Molecules(variational methods, including configuration-interaction and r_ij methods).

  Sun. P.M. Computational Methods for atomic and molecular energies (including analytic approximations, evaluation and tabulation, or approximation, of integrals).

  Monday Intermolecular forces (both cohesive and repulsive); and misc.

  1a

  Perhaps it should be emphasized again that the conference is intended for informal exchange of ideas, not for presentation of formal papers. Nevertheless, it will be good if everyone will think over, beforehand, what results, ideas, or questions he can present that are either novel, or controversial, or not widely or clearly enough understood. Such ideas can then be offered for presentation at appropriate sessions as brief semi-prepared talks which can serve as themes to start discussion. I should like to ask that those who intend to offer such talks send me a title and if possible a brief abstract for each proposed topic. I should appreciate information also about other specific topics which you are likely to feel like discussing during the informal question-and-argument phases of the sessions.

  The ONR will print for us a program of the meeting including abstracts or titles of semi-prepared and informal talks, as well as abstracts of formal papers prepared for the post-meeting Report, (No doubt in some cases abstracts for formal papers will also serve for informal talks.) Such abstracts must roach [sic] me not later than Friday, August. 5 if they are to be included in the printed program! please send a title if you cannot make the deadline for an abstract.

  After the conference the ONR will publish a Report including formal papers (about a dozen of these have so far been definitely promised), plus full accounts of the conference discussion, plus a general review of the accomplishments of the conference, prepared by the conference secretaries. Deadline for manuscripts of formal papers will be at the time of the conference. All manuscripts (including abstracts) should be typewritten, double spaced. All figures should be in black and white.

  The group will assemble at the Ram's Head Inn for dinner near 8 o'clock on Friday, September 7. Those going by railroad will take the 4:42 P.M. (daylight saving) Long Island train from the Pennsylvania Station, New York, to Greenport, Long Island on Friday (change trains at Jamaica). The only later train leaves at 6;01 P.M., and reaches Greenport at 9:05 P.M. Returning to New York on Monday, Sept, 10 after the conference, the last train leaves Greenport at 3:00 P.M.

  By car it is convenient to go by way of Greenport, from which the ferry to Shelter Island runs frequently.

  Swimming will be available at Shelter Island,

  Hotel room and meals of all conference members from Friday dinner through Monday lunch will be paid by ONR. A gratuity of about $4 to the hotel employees is customary (not provided for by ONR). For those whose travel to the conference is being assisted by ONR, final details as to reimbursement will be sent later. Tentatively, the plan is to refund at the time of the conference amounts equal to round-trip railroad fare (first-class railroad plus lower berth Pullman to New York, also per diem on travel time if funds permit, for over-night train distances) otherwise coach fare). However, this is subject to approval or modification by the Navy auditors. In any event, Pullman stubs, air tickets, or other receipts should be saved to be turned in.

  The hotel accomodations [sic] are two in a room, with separate beds. On the accompanying sheet please indicate your choices for a roommate which will be followed as closely as possible. I would also appreciate any suggestions you may care to make about the agenda, especially an indication as to specific topics you would like to discuss.

  Sincerely yours,

  R. S. Mulliken

  RSM/ds

  I am taking the 4:42 P.M. (daylight saving) Long Island R.R. train to Greenport, Friday, September 7, 1951.

  Other plans. Please give in full.

  My choices for roommate are:

  Suggestions as to the agenda, and topics you would like to discuss:

  Signed

• Newspaper Clipping: “We Are Determined to Prevent War -British Scientists,” Peace News. [Filed under LP Personal Safe, Drawer #1, Folder #1.032]

• Letter from Chris Gregory, Department of Mathematics, University of Hawaii, to LP RE: Thanks LP for considering his manuscript and Dr. Epstein for his comments as well as correcting a mistake that he made in his notation. [Letter from LP to Gregory, July 11, 1951] [Filed under LP Correspondence: (G: Correspondence, 1951), #140.15]
• Letter from J. B. Culbertson, Department of Chemistry, Cornell College, to LP RE: Thanks LP and AHP for a lovely evening during his satisfying and profitable sabbatical at Caltech. [Letter from LP to AHP, August 22, 1951] [Filed under LP Correspondence: (C: Correspondence, 1951), #74.19]
• Letter from John C. Kendrew, Cavendish Laboratory, Cambridge, to LP RE: States that he is looking forward to coming to Pasadena and learning about LP’s protein work. Discusses his U.S. schedule. [Letter from LP to Kendrew, July 10, 1951] [Letter from LP to Kendrew, July 20, 1951] [Filed under LP Correspondence: (Kendrew, John), #197.16]

• Letter from Sarah B. West to LP RE: Provides a detailed account of her son’s educational experience and his interest in astronomy. Asks LP if he has any advice on this matter. [Letter from LP to West, June 25, 1951] [Letter from LP to West, August 18, 1951] [Filed under LP Correspondence: (W: Correspondence, 1951), #443.19]
• Manuscript Notes, Calculations, X-ray Diffraction Photos: “Polyglycine”, July 15, 1951 - November 30, 1952. [Filed under LP Science: (Materials re: The Structure and Properties of Proteins, 1935-1953), Box #6.001, Folder 1.15]
• Newspaper Clipping: “Soviets Dispute a Chemical Theory”, New York Times, July 15, 1951. [Filed under LP Biographical: Scrapbooks, 1951-1955: Box #6.006, Folder 6.7] [Also filed under LP Biographical: Political Issues: (LP Passport Problems, 1945-1952.), Box #2.002, Folder #2.4]

• Bill from the Pacific Telephone and Telegraph Company to LP for $33.61. [Filed under LP Biographical: Business and Financial: (Assorted Bills, Receipts and Invoices, 1951-1962.), Box #4.060, Folder #60.1]
• Check from AHP to Linda Pauling for $50.00. [Filed under LP Biographical: (Business and Financial: Bank Statements and Canceled Checks, September 1950-December 1952), Box #4.021, Folder #21.2]
• Letter from Eleanor Reid, Managing Editor, Journal of the Electrochemical Society, to LP RE: Acknowledges LP’s order for 200 reprints of his article. [Letter from Reid to LP, June 29, 1951] [Filed under LP Manuscripts of Articles: 1951a2.5]
• Letter from LP to A. A. Merrill RE: Says that he is enjoying reading the reprints, particularly Merrill’s article on bonded debt, and that he will be including its ideas in a talk later this month. [Filed under LP Correspondence: (M: Correspondence, 1951), #256.2]
• Letter from LP to A. L. G. Rees, Australian Scientific Liaison Office, RE: States that he is looking forward to Rees’ visit to Caltech in September and explains the schedule he has planned for his visit. [Letter from Rees to LP, July 6, 1951] [Letter from Rees to LP, July 31, 1951] [Filed under LP Correspondence: (R: Correspondence, 1951), #340.16]
• Letter from LP to D. P. Riley, Royal Institution, London, RE: Thanks him for the letter and informs him that reprints will be sent when they arrive. [Letter from Riley to LP, July 6, 1951] [Filed under LP Correspondence: (Riley, D. P.), #329.6 and (The Royal Society), #339.7]
• Letter from LP to Dr. Edmund L. Keeney, San Diego County Medical Society, RE: States that he is glad the Women’s Auxiliary of the County Medical Society has been invited and that he feels LP’s talk would be appropriate for this occasion. Confirms that he will be able to give a talk at the meeting, unless something extraordinary happens. States that he looks forward to the occasion. [Letter from Keeney to LP, July 11, 1951] [Letter from Keeney to LP, July 19, 1951] [Filed under LP Speeches: 1951s.17]
• Letter from LP to President T. W. J. Taylor, University College of the West Indies, RE: Says that he will most likely arrive in Jamaica around November 14, and that he can stay for 7-10 days. States that he hopes that November 19 will be satisfactory for the date of the ceremony, rather than November 26. [Letters from Taylor to LP, June 19, 1951 and July 25, 1951] [Filed under LP Correspondence: (Taylor, T. W.), #405.7]
• Letter from LP to W. L. Bragg, Cavendish Laboratory, Cambridge. [Letter from Bragg to LP, June 13, 1951] [Filed under LP Correspondence: (Bragg, W. L.: Correspondence, 1927-1967), #30.1]

  July 16, 1951

  Sir Lawrence Bragg

  Cavendish Laboratory

  Cambridge

  England

  Dear Bragg:

  I thank you for your letter of 13 June. Dunitz had told me that he had withdrawn from candidacy fro the I.C.I. Fellowship after I had written my letter to you.

  I am very pleased to learn that you feel that our α-keratin structure carries conviction. Both Dr. Corey and I have developed much confidence in it, and also in the collagen structure, which seems to me to be the most extraordinary one of all. Dr. Hughes has not written me that you and Perutz have got some additional experimental support, by photographing the 1.5A basal plane reflection. I am very pleased to know that this reflection is given by proteins with the α-keratin structure, and also by hemoglobin. Ever since our discover of the 3.7-resudue-per-turn helix, nearly two years ago, we had been making calculations on it, with use of the published data for hemoglobin, but we hesitated to communicate the results until the comparison with fibrous proteins had been carried out, and found to be satisfactory.

  I am looking forward to hearing more about your hemoglobin work in September. Kendrew is scheduled to be in New York, I understand, and also we hope that he will visit us in Pasadena.

  Our family is all together now, except for our second son, Peter, who is working at the Marine Biological Laboratory at Woods Hole. Our eldest son, Linus, is with us, along with his wife and two babies. Crellin is now 14 years old. He thinks that there would be nothing finer than to come to visit you and Lady Bragg again.

  Ava Helen and I had a very pleasant experience last month, when we spent two weeks in Hawaii. It is really a most pleasant place.

  With best regards to Lady Bragg, I am

  Sincerely yours,

  Linus Pauling

• Letter from Marshall Sittig, Chrysler Corporation, to LP RE: Asks for a copy of his recent lectures on the use of X-ray and electron diffraction patterns. [Letter from LP to Sittig, July 25, 1951] [Filed under LP Correspondence: (S: Correspondence, 1951), #378.5]
• Letter from Rudolf Nitsche to the California Institute of Technology RE: Inquires about the possibility of working in their laboratories. [Letter from Corey to Nitsche, August 27, 1951] [Filed under LP Correspondence: (N: Correspondence, 1951), #287.18]
• Magazine Article: “Overcrowded Schedules Create Weakness at Senior Staff Level”, Chemical and Engineering News, Vol. 29, No. 29, July 16, 1951. [Filed under LP Biographical: Scrapbooks, 1951-1955: Box #6.006, Folder 6.7]
• Memo from LP to himself RE: Note from a book on the compounds of neutral nickel. [Filed under LP Science: (LP Notes to Self: Scientific, 1941, 1945, 1949-1992), Box #10.003, Folder #3.4]
• Statement of credit card purchases from the Standard Oil Company of California to LP. Charge slips attached totaling $31.22. [Filed under LP Biographical: Business and Financial: (Assorted Bills, Receipts and Invoices, 1951-1962.), Box #4.060, Folder #60.1]

• Check from AHP to Caltech Alumni Association for $4.00. [Filed under LP Biographical: (Business and Financial: Bank Statements and Canceled Checks, September 1950-December 1952), Box #4.021, Folder #21.2]
• Letter from C. Sheldon Hart, Carleton College, to LP RE: Agrees that structure, in a broad sense, is a key to general chemistry. Inquires where LP buys his cork spheres. [Letter from LP to Hart, July 25, 1951] [Filed under LP Correspondence: (H: Correspondence, 1951), #166.2]
• Letter from Charles A. Coulson, University of London King’s College, to LP RE: Agrees that it does not appear that there will be any conflicts between the talks they will give at the Journal of the American Chemical Society conference in September. [Letter from LP to Coulson, June 27, 1951] [Letter from LP to Coulson, July 20, 1951] [Filed under LP Correspondence: (Coulson, Charles A.), #68.4]
• Letter from G. F. Bell, Alcoa Mining Company, to LP RE: Thanks him for his recommendations, and says he will be ordering LP’s text, The Nature of the Chemical Bond. [Letter from LP to Bell, July 9, 1951] [Filed under LP Correspondence: (B: Correspondence, 1951), #37.18]
• Letter from LP to Frank H. Dickey RE: Says that he does not know the results of the gel samples and that he expects the reprints of the protein structures soon. LP also congratulates him on his appointment to UC Berkeley. [Letter from Dickey to LP, July 8, 1951] [Filed under LP Correspondence: (D: Correspondence, 1951), #98.16]
• Letter from LP to Frank Hovorka, Chairman of the Department of Chemistry, Western Reserve University, RE: Thanks him for his letter regarding Morris Gippin. [Letter from Hovorka to LP, July 10, 1951] [Filed under LP Correspondence: (G: Correspondence, 1951), #140.15]
• Letter from LP to James Winston RE: States that he too is not pleased with the Bulletin of Atomic Scientists but that he considers it necessary, and asks Winston to specify his grievances. [Letter from Winston to LP, July 11, 1951] [Letter from Winston to LP, July 23, 1951] [Filed under LP Correspondence: (W: Correspondence, 1951), #443.19]
• Letter from LP to MacMillian Co. Ltd. RE: Says that he would like to subscribe to Nature and asks that he begin receiving issues in January 1951. [Filed under LP Correspondence: (M: Correspondence, 1951), #256.2]
• Letter from LP to Morris Gippen RE: Offers his encouragement and logical reasoning as to why he has not been hired. Suggests that Gippen’s handicap is his attitude and that it is preventing him from securing a new position. [Letter from Gippen to LP, June 30, 1951] [Letter from Gippen to LP, July 29, 1951] [Filed under LP Correspondence: (G: Correspondence, 1951), #140.15]
• Letter from LP to Prof. E.B. Wilson RE: Encloses a paper entitled “ On the Formal Expansion of Operator Functions in Terms of a Set of Basic Operations,” by Christopher Gregory. [Filed under LP Science:(National Academy of Sciences, 1945-1951); Box #14.019, Folder #19.4]
• Letter from LP to Sir Eric Rideal, University of London, RE: Congratulates him on being knighted. [Filed under LP Correspondence: (R: Correspondence, 1951), #340.16]
• Letter from Michel Magat, Laboratorie de Chimie Physique de la Faculté des Sciences de Paris, to LP RE: Says that his visa was refused so he cannot attend the International Congress or give the lectures in Pasadena. Magat asks LP to send reprints of the protein papers when he has them. [Filed under LP Correspondence: (M: Correspondence, 1951), #256.2]
• Memo from A.H. Walter to LP RE: Encloses a copy of Task Order Number 6 under N123s-57251 for his files and requests his approval of it. Notifies him that it will probably be numerically designated Chemistry 31 once the Order is executed. [Memo from LP to Contracts Committee July 11, 1951] [Memo from LP to Walter July 20, 1951] [Filed under LP Science: (Office of Naval Research: Correspondence, Contract Status Reports and Project Status Reports, 1947-1962), Box #14.031, Folder #31.5]
• Memo from LP to Dr. S. Frankel RE: Discusses Frank Dickey’s plans for London, and states when he will be starting his duties as an instructor at U.C. Berkeley. [Filed under LP Correspondence: (F: Correspondence, 1951) #128.16]
• Memo from Robert B. Corey, Caltech, to LP RE: Suggests that William Cochran work on improving the techniques of x-ray crystallography. States that Dr. Sturdivant believes that if he does not arrive until next spring, they will have a spectrometer for him to use. [Filed under LP Correspondence: (Corey, Robert B.), #67.5]

• Bill from the Southern Counties Gas Company of California to LP for $11.77. [Filed under LP Biographical: Business and Financial: (Assorted Bills, Receipts and Invoices, 1951-1962.), Box #4.060, Folder #60.1]
• Letter from LP to C. E. Stanfield RE: Says that he does not have any information about the hard-chrome process. [Letter from Stanfield to Caltech Department of Chemistry, July 8, 1951] [Filed under LP Correspondence: (S: Correspondence, 1951), #378.5]
• Letter from LP to James M. Crowe, Executive Editor, Chemical and Engineering News, RE: States that he is too busy to prepare predictions to meet Crowe’s deadline in seven days. Says that he is disturbed that the issue will feature a special article by Anthony Standen because Crowe should have selected writers of greater value to ACS and to science. [Letter from Crowe to LP, July 10, 1951] [Filed under LP Correspondence: (Chemical and Engineering News), #70.3]
• Letter from LP to Matthew Meselson. [Note from Meselson to LP, June 11, 1951] [Letter from LP to Meselson, June 12, 1951] [Filed under LP Correspondence: (Meselson, Matthew), #246.8]

  July 18, 1951

  Mr. Matt Meselson

  Room 656

  International House

  1414- East 59th street

  Chicago, Illinois

  Dear Mr. Meselson:

  Thank you for your note. I have just arranged with Professor Swift to have you given credit for the remaining four hours of work for which you were registered.

  I have your research report. So far I have not been able to arrange with anyone else to complete the work on Eurechis hemoglobin and the isocyanides. I had hoped to give summer employment to an advanced undergraduate, in order that he could carry out some investigations in which I am interested, but I did not find a suitable man who was available.

  Your suggestion that you come to see me during the inter-quarter vacation is a good one, provided that I am in town. I plan to leave for the East somewhere near the first of September - possibly a few days earlier or a couple of days later. I shall then be back about September 18. You would better telephone over before coming to see me in order to find out if I am at hand.

  Sincerely yours,

  Linus Pauling:W

• Letter from Otto M. Smith, Director, Research Foundation, Oklahoma Agricultural and Mechanical College, to LP RE: States that they will request $146 toward the expenses he incurred during the conference in Oklahoma. He also asks for suggestions on possible members of his committee. [Letter from LP to Smith, July 25, 1951] [Filed under LP Correspondence: (S: Correspondence, 1951), #378.5]
• Memo from LP to Chuck Newton, RE: Explains the meeting that he had with Mr. Ross Thomas, vice-president in charge of research at Phillips Petroleum, concerning the Industrial Associates plan. Suggests that Newton write to Thomas and try to get Phillips Petroleum to participate in the plan. [Filed under LP Biographical: Academia: (California Institute of Technology: Administrative Files, 1938-1971.), Box #1.030, Folder #30.3]

• Check from AHP to Sue Perry for $40.00. [Filed under LP Biographical: (Business and Financial: Bank Statements and Canceled Checks, September 1950-December 1952), Box #4021, Folder #21.2]
• Letter from B. H. Sage to LP, cc: Ch.E.(2), RE: Discusses the talk he had with Dr. Stromberg concerning the thermal transfer phenomena at a moving fluid boundary. Returns Dr. Stromberg’s letter and the enclosure to LP, and tells LP to call upon him if he thinks he can be of further help in the matter. Says that he is pessimistic as to the practical effectiveness of Dr. Stromberg’s proposal. [Filed under LP Biographical: Academia: (CIT: Materials re: Division of Chemistry and Chemical Engineering, 1946-1964.), Box #1.021, Folder #21.3]
• Letter from Dr. Edmund L. Keeney, San Diego County Medical Society, to LP RE: States that they are all pleased LP will be speaking before them on October 9, 1951. Informs LP that the Society will cover all of his travel expenses. Tells LP that they would be delighted if AHP came as well. [Letter from LP to Keeney, July 16, 1951] [Letter from Keeney to LP, August 8, 1951] [Filed under LP Speeches: 1951s.17]
• Letter from LP to Roger Hayward. [Filed under LP Correspondence: (Hayward, Roger), #152.9]

  July 19, 1951

  Mr. Roger Hayward

  920 Linda Vista

  Pasadena, California

  Dear Roger:

  Could you during the next few days make some drawings. We need to get a paper off for publication immediately, because I have learned that someone else (a Swede) is doing some closely similar work, and I think that we might as well publish our results as obtained so far.

  I would like to have drawings made of the structure of Na₂Cd₁₁, closely similar to those that you have already made for me in pastel. If you need to pick these up, please drop by the laboratory and get them. There is, however, one difference, which I shall describe below - this involves an interchange of the six larger atoms and six of the smaller atoms.

  Also, the drawings to be made now should be line drawings from which cuts can be made - that is, black and white, line drawings, with stippling or some other type of shading of the atoms.

  The five drawings needed are, as before, a central atom surrounded by the skeleton of an icosahedron. Then the complex of 13 atoms surrounded by the skeleton of a pentagonal dodecahedron. Then two views of the rhombic triacontahedron, one a skeleton drawing, as before, and the other a drawing showing 32 atoms at the corners of the triacontahedron. In this case, however, 12 of the 32 atoms are to be represented as somewhat larger than the others. These are the 12 atoms that are shaded red in your pastel drawing. They are the atoms at the ends of the longer diagonals of the six rhombs that are in the six cube faces. In order to make room for them, they might be moved out a little farther from the center of the rhomb than indicated in your earlier drawings.

  The fifth drawing is a drawing showing the structure obtained by placing one of these rhombic triacontahedra at each corner of a cube, in such a way that the six rhombic faces are shared. Then an octahedron of six atoms (the same size as the smaller atoms, now) is to be introduced at the center of the cube, in the same way as in your fifth pastel drawing, the only difference being that these six atoms -are now the smaller atoms,

  Mr. Hayward 7/19/51

  and the others, as described before, at the ends of the long axes of the shared rhombic faces, are now the larger atoms.

  If you have any questions about the nature of these drawings, please let me know. They are to accompany an article to be published in the Proceedings of the National Academy of Sciences, The page here is 4 1/2 inches wide (length of the line) and 7 1/4 high. I think that the first four drawings might be put on a single sheet, about 11 inches square, which could then be reduced to 4 1/2 x 4 1/ 2. The second drawing could then be reduced to full page width, and the balls would come out about the size as in the first drawing.

  Sincerely yours,

  Linus Pauling:W

• Letter from M. Muñoz T., Macaulay Institute for Soil Research, to LP RE: Asks if he can include drawings from one of LP’s papers in his paper on clay composition. [Letter from LP to Muñoz, July 25, 1951] [Filed under LP Correspondence: (M: Correspondence, 1951), #256.2]

• Check from AHP to Market Basket for $25.00. [Filed under LP Biographical: (Business and Financial: Bank Statements and Canceled Checks, September 1950-December 1952), Box #4.021, Folder #21.2]
• Check from LP to Astounding Science and Fiction for $4.50. [Filed under LP Biographical: (Business and Financial: Bank Statements and Canceled Checks, September 1950-December 1952), Box #4.021, Folder #21.2]
• Letter from K. Lark-Horovitz, Head of the Department of Physics, Purdue University, to LP RE: Discusses a possible visit from Dr. Felix van der Maesen. [Letter from LP to Lark-Horovitz, July 25, 1951] [Filed under LP Correspondence: (L: Correspondence, 1951), #230.17]
• Letter from LP to Charles A. Coulson, University of London King’s College, RE: Comments on an aspect of Coulson’s paper on butadiene. Talks about his son, Peter, who is studying physics, and states that most of his recent studies have focused on the structure of proteins. [Letters from Coulson to LP, July 17, 1951] [Letters from Coulson to LP, August 1, 1951] [Filed under LP Correspondence: (Coulson, Charles A.), #68.4]
• Letter from LP to Christopher Gregory, Department of Mathematics, University of Hawaii, RE: Provides more comments on his manuscript. [Letter from Gregory to LP, July 14, 1951] [Filed under LP Correspondence: (G: Correspondence, 1951), #140.15]
• Letter from LP to Frederick Seitz, Department of Physics, University of Illinois, RE: Says that he will not be able to attend the conference on the optical and electrical properties of ionic crystals. [Letter from Seitz to LP, July 12, 1951] [Filed under LP Correspondence: (S: Correspondence, 1951), #378.5]
• Letter from LP to John C. Kendrew, Cavendish Laboratory, Cambridge, RE: Says that he looks forward to seeing him in August and asks when he will arrive so that he can make hotel reservations. [Letter from Kendrew to LP, July 14, 1951] [Letter from Kendrew to LP, July 26, 1951] [Filed under LP Correspondence: (Kendrew, John), #197.16]
• Letter from LP to William H. Freeman, W. H. Freeman & Co., RE: Requests a bound copy of the last printing of General Chemistry with interleaved blank pages. [Letter from Schaefer to LP July 24, 1951] [Filed under LP Books: 1947b6.2]
• Letter from Milton Harris, Harris Research Laboratories, to LP RE: Tells LP that C. H. Bamford would like to see him when he visits California in October. [Letter from LP to Harris, July 25, 1951] [Filed under LP Correspondence: (B: Correspondence, 1951), #37.18]
• Letter from Robert F. Gould, Managing Editor, Chemical and Engineering News, to LP RE: Discusses their plans to publish titles of Ph.D. theses in their journal as soon as they have been accepted. States that they have selected ten leading universities for this trial run, including Caltech. Requests that LP provide them with Ph.D. theses in chemistry and chemical engineering that were accepted for degrees at the most recent commencement. Asks for additional information. [Letter from LP to Gould, July 30, 1951] [Filed under LP Correspondence: (Chemical and Engineering News), #70.3]
• Memo from LP to A.H. Walter RE: Approves execution of Task Order 6 under N123s-57251. [Memo from Walter to LP July 17, 1951] [Memo from Lindvall to DuBridge July 25, 1951] [Filed under LP Science: (Office of Naval Research: Correspondence, Contract Status Reports and Project Status Reports, 1947-1962), Box #14.031, Folder #31.5]
• Referee Comments by LP RE: Concerns a manuscript entitled, “Properties and Structure of Vitreous and Crystalline Boron Oxide I.,” by Fajans and Barber. [Letter from LP to Noyes, October 3, 1951] [Filed under LP Correspondence: (Journal of the American Chemical Society), #191.1]
• Report: Standard Samples for Physico-Chemical Measurements, a report to the Committee on Physical Chemistry of the Division of Chemistry and Chemical Technology of the National Research Council by its subcommittee on Physico-Chemical Standards. [Filed under LP Science:(National Research Council, 1950-1992), Box #14.028, Folder #28.1]

• Check from AHP to Bill’s Liquor Mart for $15.46. [Filed under LP Biographical: (Business and Financial: Bank Statements and Canceled Checks, September 1950-December 1952), Box #4.021, Folder #21.2]
• Handwritten copy of letter from LP to the Collector of Internal Revenue, RE: Encloses for identification a statement of income tax due. Explains that the amount due corresponds to a $2000 error in income. Asks him to return his enclosed statement with a note telling him where he made an error in his calculations. [Letter from Ridell to LP and AHP, August 3, 1951] [Filed under LP Biographical: Business & Financial: (Tax Documents, 1930-1956.), Box #4.001, Folder #1.5]
• Manuscript Notes, Memoranda, Calculations, Diagram, X-ray Diffraction Photos: “Rudall’s Photograph of Fibrin”, July 21, 1951 - January 14, 1952. [Filed under LP Science: (Materials re: The Structure and Properties of Proteins, 1951-1956), Box # 6.002, Folder #2.1]
• Pamphlet: (in Italian) “Ricerche chimico-fisiche sull’emoglobina del morbo di Cooley” byt Alfonso M. Liquori and Floriana Bertinotti. Reprinted from La Ricerca Scientifica. [Filed under LP Science: (Non-Pauling Reprints re: Hemoglobin research, 1930s - 1950s), Box #6.009, Folder #9.2]

• Letter from H. Harry Szmant, Duquesne University, to LP RE: Discusses the electronic structure of sulfones. There are three notes in the left margin: one is indecipherable, the second reads, “I agree,” and the third says, “I don’t know.” [Letter from LP to Szmant, July 30, 1951] [Filed under LP Correspondence: (S: Correspondence, 1951), #378.5]

• Check from AHP to Beatrice Wulf for $100.00. [Filed under LP Biographical: (Business and Financial: Bank Statements and Canceled Checks, September 1950-December 1952), Box #4.021, Folder #21.2]
• Letter from Dennis Flanagan, Editor, Scientific American, to LP RE: Encloses a copy of the August issue containing the article about LP’s work with sickle-cell anemia, and returns the diagrams. Asks LP if, at some point, he would be willing to write an article about his new protein work. [Letter from Flanagan to LP, June 22, 1951] [Letter from LP to Flanagan, August 2, 1951] [Filed under LP Correspondence: (Scientific American), #374.9]
• Letter from LP to Dr. Edward C. Lingafelter, University of Washington, RE: Informs him that Mr. Freeman sent him corrections that Lingafelter had pointed out from COLLEGE CHEMISTRY. Thanks him for pointing these errors out. Handwritten note: “I do not have this. BW.” [Filed under LP Personal Safe, Drawer #2, Folder #2.009]
• Letter from LP to E. A. Moelwyn-Hughes, Physical Chemistry Department, University of Cambridge, RE: Asks for a reference for J. S. McKinley McKee. [Letter from Moelwyn-Hughes to LP, July 30, 1951] [Filed under LP Correspondence: (Moelwyn-Hughes, E. A.), #248.7]
• Letter from LP to J. S. McKinley McKee, Physical Chemistry Department, University of University of Cambridge, RE: States that there might be a place for him at the Institute, but that he is unsure about funding. Asks if he is interested in hemoglobin and heme compounds. [Note from McKee to LP, July 12, 1951] [Filed under LP Correspondence: (M: Correspondence, 1951), #256.2]
• Letter from LP to Mr. W. H. Freeman, RE: Encloses a list of corrections for COLLEGE CHEMISTRY. [Filed under LP Personal Safe, Drawer #2, Folder #2.009]
• Letter from LP to R. G. W. Norrish, Physical Chemistry Department, University of Cambridge, RE: Asks for a reference for J. S. McKinley McKee who would like to obtain a fellowship and carry on his work on the combination of alkyl isocyanides with hemoglobin and related home proteins at Caltech. [Letter from Norrish to LP, July 28, 1951] [Filed under LP Correspondence: (M: Correspondence, 1951), #256.2 and LP Correspondence: (Norrish, Ronald G. W.), #277.13]

• Letter from LP to Paul M. Marston RE: Thanks him and Mr. Maxwell for answering his letter and enclosing the signed account current for Edward Crellin Pauling. [Letter from Marston to LP, June 28, 1951] [Filed under LP Biographical: Personal & Family: (Family Correspondence: Edward Crellin Pauling, 1930-1995, No Date.), Box #5.048, Folder #48.3]
• Letter from LP to Roger Hayward RE: States that he will not be getting the paper on Na2Cd11 to the editor before the end of the month. Criticizes some of Hayward’s drawings, and asks if he will redraw some of the figures. [Letter from Hayward to LP, July 27, 1951] [Filed under LP Correspondence: (Hayward, Roger), #152.9]
• Letter from N. Jacobson, Port Agent, National Union of Marine Cooks and Stewards, to Sirs and Brothers RE: Includes a resolution in support of the Spanish people that unanimously passed at their last San Francisco membership meeting. Indicates who was elected to represent their union at the Thomas Addis Anniversary Dinner, and encloses a check to cover the cost. [Filed under LP Correspondence: (Materials re: Thomas Addis Memorial Committee and Addis Biographical Memoirs research), #2.4]
• Letter from Stanley Schaefer, W. H. Freeman & Co., RE: Says that a copy of General Chemistry will be interleaved and sent to LP. Regrets that he was unable to attend a function last Tuesday. [Letter from LP to Freeman July 20, 1951] [Filed under LP Books: 1947b6.2]
• Letter from W. George Parks, Gordon Research Conferences, to LP RE: Provides information about the Gordon Research Conference on Inorganic Chemistry. [Filed under LP Correspondence: (Stern, Kurt G.), #368.2]
• Memo from Robert B. Corey, Caltech, to LP RE: Discusses the subject of sodium thymonucleate. [Filed under LP Correspondence: (Corey, Robert B.), #67.5]
• Memorandum from LP to Robert Corey. [Filed under LP Science: Box #6.002, Folder #2.1]

  Rudall’s crystalline fibrin

  I have worked for several days on Rudall’s photograph of fibrin, and my results are described in the following paragraph. First, we note that there is what seems to be a powder line with six strong reflections on it, forming a hexagon. The equatorial reflections correspond to spacing 2.84 A, and the others to 2.81 A. These are close enough to the value for 200 of sodium chloride to suggest that there are some oriented sodium chloride crystals in the preparation.

  I have considered this possibility and rejected it. First, in order to give six spots from the form 200, the sodium chloride crystals would have to be oriented with the zone axis 220 vertical. Then the four spots not on the equator would be at angles of close to 45º, whereas in fact these four spots are at the angle 57º with the equator. Second, the difference between the spacings 2.84 and 2.81 A seems to be real. Third, there is no indication of the reflections 111 and 220 of sodium chloride that would be expected.

  I have accordingly assumed that all of the spots on the photograph are to be attributed to fibrin, except the ring identified by Rudall xx from 111 of copper, and a few round spots (that is, not having the shape expected for a reflection from the fibrin sample), that are also not duplicated in positions on the film where they should be because of the symmetry of the film.

  I have measured eight spots in the equator, which may be named A1 to A8. Their spacings are 10.0, 4.89 A (marked on original inspection of the photograph as possibly double), 3.16, 2.84, 2.65, 2.47, 2.38, 2.24 A. Of these the strongest is A4. The remaining spots lie approximately on two hyperbolas, duplicated also below the equator. These hyperbolas correspond approximately to identity distance 7 A and 3.5 A along the fiber axis.

  J. R. Katz and A. deRooy reported fibrin to have the β-keratin structure. Later K. Bailey, W.T. Astbury, and K.M. Rudall, Nature, 151, 716 (1943), stated that fibrinogen and fibrin give an α-keratin pattern, and after extended stretching of the sample gives a β-keratin pattern. However, W.T. Astbury, Proc. Roy. Soc. B 134, 303 (1946) reproduces photographs of α-fibrin, β-fibrin, α-fibrinogen, and β-fibrinogen (his designations). I note that the α photographs show a closer general resemblance to the β-keratin pattern than to the α–keratin pattern. However, the strong 4.7 A reflection of β-keratin is not present. I think that Astbury identified these as α photographs because of the absence of this equatorial reflection, and that this was a mistake. I think that it is likely that the α is really a special kind of β, such that the 4.7 A reflection is very weak.

  When the off-equator reflections are measured it is found that they do not correspond to a small fiber-axis identity distance. For example, spot B2 with d = 4.08 A, lies on a hyperbola corresponding to identity distance 7.10 A, and a similar reflection in the next hyperbola, C2, with d = 2.95 A, corresponds to 3.56 A. These two identity distances are related by the factor 1/2. Similarly, two other reflections, B3 and C3, with spacing 3.78 A and 2.81 A, respectively, lie on the hyperbolas corresponding to 6.75 A and 3.39 A, respectively, which are again related by the factor 1/2.

  We must decide between two/alternative explanations of these facts. One is that the pattern is really the superposition of two fiber patterns, with fiber-axis identity distances 7.10 A and 6.75 A, respectively. The second is that the fiber-axis distances 7.10 and 6.75 are respectively the 19th and 20th submultiples of a very large fiber-axis identity distance, 135 A. several facts indicate the second of these to be correct. Other reflections correspond to different fiber-axis identity distances, including 7.45 and 6.37, and half these values. These can be interpreted on the second alternative as the 18th and 21st submultiples of 135 A, respectively, whereas there is no explanation for them on the other basis. Also, the reflections C3 and B2 correspond to the same equatorial reflection, A2 (which, however, appears possibly to be a double reflection, one component of which might belong to one pattern and the other to the other). I have accordingly proceeded on the assumption that the identity distance y has the value 135 A.

  We may now ask what the explanation of the non-equatorial reflections is. Fibrin is made by the aggregation of fibrinogen molecules. Fibrinogen molecules are known to be long and thin. They might consist of polypeptide chains in a beta sheet, with perhaps two sheets, each containing 4 or 5 chains, constituting a molecule.

  These molecules would line up beside one another in fibrin. They might line up in such a way as to give essentially an aggregate of infinite sheets. However, it is known that the about one residue in 25 is proline, which will cause a flaw in the lattice. Other aspects of the distribution of amino acid residues might cause the true identity distance to be 135 A or a multiple of this value, in the fiber-axis direction. In a well-crystallized specimen of fibrin the observed reflections would correspond to this value of y. However, only those orders of reflection would occur with significant intensity that correspond approximately also to a small unit, with y = to about 7 A, as in β-keratin and silk fibroin. The enhancement effect would be expected to give rise to several closely adjacent hyperbolae, as is observed on Rudall’s photograph.

  I have found that all of the equatorial reflections A1 to A8 can be easily accounted for by a monoclinic unit, such that the strong reflection A4 corresponds to the plane 203. The parameters of the unit area are a = 9.50 A, b = 135 A, c = 10.03 A, β = 85.1º. The reflection A2 that appears to be double could have the indices 002 and 200, with spacings 5.00 A and 4.75 A, respectively, the average spacing as measured being 4.89 A.

  I am not sure what to do next. I think that it would be a good idea for us to have our own photographs of fibrin. Would you have a fibrin preparation made and photographed. Also, it occurs to me that it might be a good idea to get hold of some of the commercial fibrin film that was made at Harvard, in order to see what sort of a diffraction pattern it gives.

  Linus Pauling

• Bill from Athenaeum to LP for $10.65. Handwritten note: “Pd.” [Filed under LP Biographical: Business and Financial: (Assorted Bills, Receipts and Invoices, 1951-1962.), Box #4.060, Folder #60.1]
• Bill from Peter Satori British Motor Cars to AHP for $13.50. [Filed under LP Biographical: Business and Financial: (Assorted Bills, Receipts and Invoices, 1951-1962.), Box #4.060, Folder #60.1]
• Check from AHP to Peter Satori for $44.97. [Filed under LP Biographical: (Business and Financial: Bank Statements and Canceled Checks, September 1950-December 1952), Box #4.021, Folder #21.2]
• Letter from LP to C. H. Bamford, Courtaulds, Limited, RE: Invites Bamford to visit him when he travels to California in October. Asks if Bamford would be interested in giving a seminar talk. [Letter from LP to Harris, July 25, 1951] [Letter from Bamford to LP, August 8, 1951] [Filed under LP Correspondence: (B: Correspondence, 1951), #37.18]
• Letter from LP to C. Sheldon Hart, Carleton College, RE: Says that an article for Chemical Education or Chemical and Engineering News would be worthwhile and encloses information about cork spheres. [Letter from Hart to LP, July 17, 1951] [Letter from Hart to LP, August 4, 1951] [Filed under LP Correspondence: (H: Correspondence, 1951), #166.2]
• Letter from LP to Dr. K. Lark-Horovitz, Head of the Department of Physics, Purdue University, RE: Says that he looks forward to seeing Dr. Felix van der Maesen. [Letter from Lark-Horovitz to LP, July 20, 1951] [Filed under LP Correspondence: (L: Correspondence, 1951), #230.17]
• Letter from LP to E.G. Watson RE: Recommends that the name of Robert C.C. St. George be sent to the International Universities Bureau in connection with the potential openings for university professor in Pakistan. [Memo from Watson to LP August 1951] [Filed under LP Correspondence: (S: Correspondence, 1951), #378.5]
• Letter from LP to George H. Coleman, Friends of the Kresge-Hooker Scientific Library, Chemistry Department, Wayne University, RE: Says that he will have the manuscript for the Record of Chemical Progress to him by September 1. [Letter from Coleman to LP, May 14, 1951] [Filed under LP Correspondence: (C: Correspondence, 1951), #74.19]
• Letter from LP to M. Muñoz T., Macaulay Institute for Soil Research, RE: Gives his permission to use the drawings from Proceedings of the National Academy of Sciences, 16, 578, 1930. [Letter from Muñoz T. to LP, July 19, 1951] [Filed under LP Correspondence: (M: Correspondence, 1951), #256.2]
• Letter from LP to Marshall Sittig, Chrysler Corporation, RE: Says that he has not written the lecture he gave on x-ray and electron diffraction, but provides an article by Robert Spurr that might help. [Letter from Sittig to LP, July 16, 1951] [Filed under LP Correspondence: (S: Correspondence, 1951), #378.5]
• Letter from LP to Milton Harris, Harris Research Laboratories, RE: Thanks him for the notification of Dr. Bamford’s upcoming visit. States that he is very interested in Dr. Bamford’s work, so he has invited him to visit. [Letter from Harris to LP, July 20, 1951] [Filed under LP Correspondence: (B: Correspondence, 1951), #37.18]
• Letter from LP to Otto M. Smith, Oklahoma Agricultural and Mechanical College, RE: Says that he is looking forward to the possibility of the committee coming to Pasadena. Informs that he will not be able to attend the next meeting. [Letter from Smith to LP July 18, 1951] [Filed under LP Correspondence: (S: Correspondence, 1951), #378.5]
• Letter from LP to Professor R. J. W. Le Fevre, University of Sydney, RE: Congratulates him on the gift made to the University of Sidney, and invites him to visit Pasadena. [Note from Le Fevre to LP, No Date] [Filed under LP Correspondence: (L: Correspondence, 1951), #230.17]
• Letter from LP to W.H. Freeman Co., Attn: Miss T. Johnson, RE: Notes even more changes for COLLEGE CHEMISTRY. Informs her that some of them are from her letter of June 12th. [Letter from Johnson to LP, June 12, 1951] [Letter from Johnson to LP, July 27, 1951] [Filed under LP Personal Safe, Drawer #2, Folder #2.009]
• Letter from LP to W.H. Freeman Co., Attn: Miss T. Johnson, RE: Notes further corrections for COLLEGE CHEMISTRY. [Letter from Johnson to LP, July 27, 1951] [Filed under LP Personal Safe, Drawer #2, Folder #2.009]
• Letter from LP to the Secretaries of the Proceedings of the Royal Society, RE: Submits a manuscript for publication entitled “An Electrochemical Approach to Crystal Chemistry with Special Reference to the Micas.” by R. P. Mitra and K. S. Rajagopalan. [Letter from Martin to LP, July 30, 1951] [Filed under LP Correspondence: (The Royal Society), #339.7]
• Letter from President T. W. J. Taylor, University College of the West Indies, to LP RE: Says that November 20 is a bad date because it is a holiday in Jamaica, but that he will begin to make arrangements for the ceremony to be held November 16 or17. He also mentions that J. Z. Young from the University of London will be in Jamaica at the same time. [Letter from LP to Taylor, July 16, 1951] [Letter from LP to Taylor, August 2, 1951] [Filed under LP Correspondence: (Taylor, T. W.), #405.7]
• Letter from W. H. Freeman to LP RE: Requests LP’s response to two points regarding corrections for reprints of his books. [Filed under LP Correspondence: (W. H. Freeman and Company, 1951), #439.9]
• Memo from F.C. Lindvall to President L.A. DuBridge RE: Explains that LP’s task order has been accepted by the Contracts Committee. States that since the original contract is one that encourages task orders of a service nature the Committee watches any of the orders under it very closely. [Memo from LP to Walter July 20, 1951] [Memo from DuBridge to LP July 31, 1951] [Filed under LP Science: (Office of Naval Research: Correspondence, Contract Status Reports and Project Status Reports, 1947-1962), Box #14.031, Folder #31.5]
• Memo from LP to Dean Watson, RE: Suggests that the name of Dr. Robert C. C. St. George be sent on the to International Universities Bureau in connection with the openings for university and assistant professors in Pakistan. Explains Dr. St. George’s qualifications, and talks about his interest of teaching in India. Says that he has been appointed instructor at Harvard from the 1951-52 year, so he would not be available for appointment in Pakistan until September 1952. [Filed under LP Biographical: Academia: (California Institute of Technology: Administrative Files, 1938-1971.), Box #1.030, Folder #30.8]
• Memo from LP to Dean Watson. [Memo from Watson to LP, August 1951] [Filed under LP Correspondence: (S: Correspondence, 1951), #378.5]

  July 25, 1951

  To: Dean Watson

  From: Linus Pauling

  Subject: Recommendation for opening in Pakistan

  Pasadena, California

  I suggest that the name of Dr. Robert C. C. St. George be sent on to the International Universities Bureau in connection with the openings for university professors and assistant professors in Pakistan.

  Dr. St. George was Merck Fellow last year, from January 1 to December 31, 1950. He spent this period in Pasadena, working with me on compounds of hemoglobin. He is a biochemist, who received his Ph.D. degree at Harvard in 1949. Dr. St. George worked with Professor George Wald in the Biology Department at Harvard University.

  Dr. St. George told me that he was interested in the possibility of teaching in India, and I judge that he would include Pakistan in this interest. I made an effort to get an appointment for him in India, but without success.

  Dr. St. George now has been appointed instructor at Harvard, for the year 1951-52. Accordingly he would not be available, I judge, for appointment in India in September of 1951, but he might be interested in an appointment for September 1952.

  Dr. St. George is married. He is a very able and well trained man. I expect him to be a first-rate teacher. While here he assisted to some extent in the teaching of freshman chemistry.

  Linus Pauling:W

• Newspaper Clipping: “Memorial Dinner to Dr. Addis”, People’s World, July 25, 1951. [Filed under LP Biographical: Scrapbooks, 1951-1955: Box #6.006, Folder 6.7]
• Newspaper Clipping: “Probable Location”, People's World, July 25, 1951. [Filed under LP Biographical: Scrapbooks, 1951-1955: Box #6.006, Folder 6.7]
• Newspaper Clipping: “What’s On”, People's World, July 25, 1951. [Filed under LP Biographical: Scrapbooks, 1951-1955: Box #6.006, Folder 6.7]
• Note from John Iball, University of St. Andrews, to LP RE: Requests reprints of LP’s protein structure papers. [Letter from LP to Iball August 15, 1951] [Filed under LP Correspondence: (I: Correspondence, 1951), #185.12]
• Open Letter to Secretary Acheson from Illinois Committee for Peaceful Alternatives. [Filed under LP Peace: (Assorted Peace Groups. (Co-Ev)), Box #4.011, Folder #11.1]
• Receipt from Peter Satori, British Motor Cars, to Linda Pauling for $31.47. [Filed under LP Biographical: Business and Financial: (Assorted Bills, Receipts and Invoices, 1951-1962.), Box #4.060, Folder #60.1]

• Letter from John C. Kendrew to LP RE: States that he will arrive in Pasadena on August 6th or 7th. [Letter from LP to Kendrew, July 20, 1951] [Filed under LP Correspondence: (Kendrew, John), #197.16]
• Letter from LP to Dr. Louis Levin, Biochemistry Branch, Office of Naval Research, Navy Department RE: Notifies him as to the immediate needs of the lab regarding funding for the research project on protein structure. Explains that they have made some discoveries in their recent work which persuade them to think that they should not put this research on hold. Handwritten note in top right corner: “office copy return to BW please.” [Memo from LP to Walker October 30, 1951] [Filed under LP Science: (Office of Naval Research: Correspondence, Memoranda, Notes and Assorted Materials re: “the Structure and Properties of Proteins and Synthetic Polypeptides”, Contract Nonr 220(05) (Chemistry 32), 1951-1963), Box #14.032, Folder #32.1]
• Letter from LP to Eugene G. Rochow, Department of Chemistry, Harvard University. [Letter from Rochow to LP, August 1, 1951] [Filed under LP Correspondence: (R: Correspondence, 1951), #340.16]

  July 26, 1951

  Professor Eugene G. Rochow

  Department of Chemistry

  Harvard University

  12 Oxford Street

  Cambridge 38, Massachusetts

  Dear Professor Rochow:

  I am writing to ask you for some information about your ideas on the low temperature coefficient of viscosity of the silicone oils.

  Recently someone has told me that in lectures to your students and in talks before local sections of the American Chemical Society you have stated that it has been shown that the explanation that I have offered in my textbook of the low temperature coefficient of viscosity is wrong, and have referred to the work of Roth and Harker on octamethylspiro(5,5)pentasiloxane.

  So far as I am aware, there is no reliable evidence to show that my suggestion is wrong; and, on the other hand, I think there is good reason to doubt the suggestion made by Roth and Harker, that there is an abnormally easy librational motion of the methyl groups in the silicones, and that this librational motion is responsible, in some unexplained way, for the low values of the heat of vaporization and the temperature coefficient of viscosity of these oils.

  You probably know that in their paper in Acta Crystallographica vol. 1, page 34 (1948), Roth and Harker merely suggest that "free rotation of CH, groups about siloxy bonds in the linear polymers is responsible for the small intermolecular forces characteristic of these compounds." They do not explain why free rotation of this sort should lead to small intermolecular forces, nor do I understand why it should. Moreover, although Roth and Harker make a quite definite statement that they have shown that there is an abnormal case of libration motion of the methyl groups, examination of their paper shows that it is quite likely that this conclusion is unjustified, and that instead it rests upon an error of judgment made by them in the selection of the value for the x-ray scattering factor of the methyl groups.

  Prof. Rochow

  Roth and Harker carried out their calculations for the methyl group of the x-ray scattering factor for the fluorine atom. This was a serious error on their part. It has been found that the scattering factor for the carbon atom, as given by theoretical calculations, serves well for the carbon atom in the methyl group, except that a small correction is needed at very small diffraction angles. The scattering factor for the fluorine atom is between 1.5 and two times as great as that for the carbon atom, and it is accordingly not surprising that Roth and Harker were unable to get satisfactory agreement between the observed and calculated intensities without making some additional correction. The correction that they introduced was that of using a temperature factor corresponding to an abnormally great libration of a methyl group. This temperature factor cuts down the scattering factor for fluorine to approximately the correct value for the carbon atom. In other words, the electron distribution for fluorine atom with a large temperature coefficient is just about correct for a methyl group with a normal temperature coefficient. Roth and Harker are not justified in concluding that the methyl group in their compound shows abnormal librational motion, relative to the siloxane nucleus of the molecule.

  The foregoing statements would not, of course, be justified if Roth and Harker had been required to assign an abnormal motion to the methyl group only in the transverse directions, with a normal temperature coefficient in the directions along the bonds. However, they themselves state "Within the limits of the available data, the correction could probably be represented as a specific temperature factor applied to the CH3 groups, that is , exp(-BCH,(sin θ/λ)2), but this would seem incorrect since it implies abnormally large amplitudes for silicone methyl stretching vibrations." Thus an isotropic temperature coefficient correction for the fluorine scattering factors would, according to Roth and Harker, agree with their data. This isotropic temperature correction multiplied into the fluorine scattering factor gives, however, just the correct scattering factor for the methyl group. Roth and Harker point out that there is indication that the entire pentasiloxane molecule is undergoing significant libration within the crystal. This has been observed for other molecular crystals also.

  I conclude by pointing out that Roth and Harker have not presented evidence to show that there is an abnormally great librational motion of the methyl groups relative to the siloxane nucleus in the pentasiloxane molecule, and that there is no sound reason to support their proposal that such an abnormal librational motion is responsible for the properties of the silicones. Also, so far as I know, there exists no evidence that contradicts the suggestion that I have made about the nature of silicone oils.

  I hope that you will tell me what you think of this matter. I have looked in your book on the chemistry of silicones, without finding any discussion of the point. I have not yet seen the second edition of the book, however.

  Sincerely yours,

  Linus Pauling:W

• Letter from Robert Corey, Caltech, to L. E. R. Picken, Department of Zoology, University of Cambridge, cc: LP RE: Says that they have obtained no patterns similar to his. Discusses his plans to take a few more photos and then to return Picken’s specimen. States that he made copies of Picken’s photos, but asks to keep the originals for another month. [Letter from LP to Picken, June 12, 1951] [Filed under LP Correspondence: (P: Correspondence, 1951), #312.16]
• Memorandum from LP to Robert Corey. [Filed under LP Science: Box #6.002, Folder #2.1]

  Crystalline fibrin

  Yesterday I decided that it might be possible that the chains in fibrin are parallel, and that the unit is only half as large as previously assumed: namely, with a = 4.75 A, b = 135 A, c = 10.03 A, β = 85.1º. on checking this possibility I found that the small unit accounts for all of the reflections that I had measured except one, a faint equatorial reflection with spacing 3.16 A. However, the possibility then suggested itself that this reflection be a β reflection. If it is assumed that it is due to copper Kβ – Rudall stated “probably trace of β” – then the spacing becomes 2.84 A, which is that of the strongest equatorial reflection.

  On checking the other reflections I had found another very faint reflection that is to be interpreted as β, corresponding to the strongest non-equatorial spot, with spacing 2.81 A.

• Check from AHP to Claremont Hand Prints for $11.33. [Filed under LP Biographical: (Business and Financial: Bank Statements and Canceled Checks, September 1950-December 1952), Box #4.021, Folder #21.2]
• Check from AHP to Sue Perry for $25.00. [Filed under LP Biographical: (Business and Financial: Bank Statements and Canceled Checks, September 1950-December 1952), Box #4.021, Folder #21.2]
• Letter [typed] from F. J. Toole, Department of Chemistry, University of New Brunswick, to LP RE: Invites LP to come to Fredericton on August 30th and 31st for Sir Robert Robinson’s visit. Asks LP to make a change in his NY itinerary. [Letter from LP to Toole, August 2, 1951] [Filed under LP Correspondence: (Robinson, Robert), #335.2 and LP Travel: Box #1.001 Folder 1.9]
• Letter from Roger Hayward to LP RE: Encloses a sketch and discusses it. States that he produces the figures for the pleasure involved, but that he does not enjoy receiving criticisms of drawings that he was asked to produce in a hurry. [Letter from LP to Hayward, July 24, 1951] [Letter from LP to Hayward, August 2, 1951] [Filed under LP Correspondence: (Hayward, Roger), #152.9]
• Letter from T. Johnson, W.H. Freeman and Company Publishers, to LP, RE: Thanks him for all the corrections that have been sent in. Asks LP about a change he suggested in his July 25th letter.
• Note from Frank Lanni, Instituto Osvaldo Cruz, to LP RE: Says that he will be visiting Pasadena in August and tells LP of his travel plans. States that his appointment at Illinois is official, and thanks LP for his recommendation. [Letter from LP to Lanni, June 28, 1951] [Filed under LP Correspondence: (Lanni, Frank), #212.10]
• Southern Commercial and Savings Bank Advice of Various Charges for AHP for $1.50. [Filed under LP Biographical: (Business and Financial: Bank Statements and Canceled Checks, September 1950-December 1952), Box #4.021, Folder #21.2]
• Tells him how to identify the different printings of the book. [Letter from LP to Johnson, July 25, 1951] [Letter from LP to Johnson, July 30, 1951] [Filed under LP Personal Safe, Drawer #2, Folder #2.009]

• Letter from R. G. W. Norrish, Physical Chemistry Department, University of Cambridge, to LP RE: Says that J. S. McKinley McKee is a competent experimenter, but that he does not think that he has the intellectual capability to direct original research on his own. [Letter from LP to Norrish, July 23, 1951] [Letter from LP to Norrish, August 6, 1951] [Filed under LP Correspondence: (M: Correspondence, 1951), #256.2 and LP Correspondence: (Norrish, Ronald G. W.), #277.13]
• Southern Commercial and Savings Bank Advice of Various Charges for AHP for $0.50. [Filed under LP Biographical: (Business and Financial: Bank Statements and Canceled Checks, September 1950-December 1952), Box #4.021, Folder #21.2]

• Action Memo No. 8 from Paul B. Johnson, Executive Director, to All Chapters and Councils, Committee for Peaceful Alternatives, RE: Discusses local peace work, offers to start new chapters, letter campaigns, a fund-raiser, and other matters. [Filed under LP Peace: (Assorted Peace Groups. (Co-Ev)), Box #4.011, Folder #11.1]
• Letter from Morris Gippin to LP RE: Thanks him for his interest and advice, and says that he has been appointed to the Rubber and Plastics section of the ERDL. [Letter from LP to Gippin, July 17, 1951] [Letter from LP to Gippin, August 6, 1951] [Filed under LP Correspondence: (G: Correspondence, 1951), #140.15]

• Check from AHP to Collector of Internal Revenue for $17.61. [Filed under LP Biographical: (Business and Financial: Bank Statements and Canceled Checks, September 1950-December 1952), Box #4.021, Folder #21.2]
• Letter from D. C. Martin, Assistant Secretary, Royal Society, to LP RE: States that they received LP’s article, “An Electrochemical Approach to Crystal Chemistry with Special Reference to the Micas.” [Letter from LP to Secretaries, July 25, 1951] [Filed under LP Correspondence: (The Royal Society), #339.7]
• Letter from E. A. Moelywn-Hughes, Physical Chemistry Department, University of Cambridge, to LP RE: Tells him about McKee’s work in his lab. Says McKee is a hard worker, but that he requires supervision. [Letter from LP to Moelwyn-Hughes, July 23, 1951] [Letter from LP to Moelwyn-Hughes, August 6, 1951] [Filed under LP Correspondence: (Moelwyn-Hughes, E. A.), #248.7]
• Letter from H. L. Holmes, Riker Laboratories to LP RE: Congratulates him on his presentation at the seminar at Riker Laboratories and inviting to come visit the research laboratories. [Filed under LP Speeches: 1951s.13]
• Letter from Ira M. Freeman, Department of Natural Sciences, UNESCO, to LP RE: Says that he is sending a copy of the series of reports on the place and role of the sciences in general education. [Letter from LP to Freeman, August 16, 1951] [Filed under LP Correspondence: (United Nations Educational, Scientific, and Cultural Organization (UNESCO)), #420.2]
• Letter from Julia A. Noonan, Assistant Secretary, American Philosophical Society to LP RE: Requests that he sign the Certificates of Membership for the newly elected members of the society, since he is one of the vice-presidents. Suggests forwarding them to him so that he can sign. [Letter from LP to Noonan August 2, 1951] [Filed under LP Science: (American Philosophical Society, 1936-1963, 1989, 1991), Box #14.011, Folder #11.2]
• Letter from LP to Dr. Anton Postl, Oregon College of Education, RE: Thanks him for the suggestions that he made to Mr. Behnke about COLLEGE CHEMISTRY. Handwritten note: “I do not have this. BW.” [Filed under LP Personal Safe, Drawer #2, Folder #2.009]
• Letter from LP to Dr. Charles E. Jahrem, Austin Junior College, RE: Informs him that he has corrected the list of errors that he noticed in LP’s COLLEGE CHEMISTRY. Handwritten note: “I do not have this. BW.” [Filed under LP Personal Safe, Drawer #2, Folder #2.009]
• Letter from LP to Grundfest, Marine Biological Laboratory, College of Physicians and Surgeons, Columbia University, RE: Gives up his plan to visit Woods Hole. States that he is sorry that he will not be able to see Dr. Grundfest this summer and that he hopes that he is satisfied with Peter’s work. [Letter from Grundfest to LP, July 10, 1951] [Filed under LP Correspondence: (G: Correspondence, 1951), #140.15]
• Letter from LP to H. Harry Szmant, Duquesne University, RE: Says that he is not sure how changes in the d orbitals of sulfur bonds would influence subsequent bond angles. LP guesses that the bond angle would increase, but has little confidence in the hunch. [Letter from Szmant to LP, July 22, 1951] [Filed under LP Correspondence: (S: Correspondence, 1951), #378.5]
• Letter from LP to James Winston RE: Thanks him for his letter and says that he hopes he that he will publish an article on his views of human affairs. [Letter from Winston to LP, July 23, 1951] [Filed under LP Correspondence: (W: Correspondence, 1951), #443.19]
• Letter from LP to Joseph Ferrante RE: States that he is pleased that Ferrante found General Chemistry interesting, and explains his reference to cyanuric triazide. LP recommends Francis Weston Sears’ books for a good introductory book on physics. [Letter from Ferrante tp LP, July 7, 1951] [Filed under LP Correspondence: (F: Correspondence, 1951), #128.16]
• Letter from LP to Kurt G. Stern, Vice-Chairman, Gordon Conference on Nucleic Acids & Proteins, Polytechnic Institute of Boston, RE: States that he will not be able to accept the invitation to attend the Gordon Conference on Nucleic Acids and Proteins. [Letter from Stern to LP, June 18, 1951] [Letter from Stern to LP, August 8, 1951] [Filed under LP Correspondence: (Stern, Kurt G.), #368.2]
• Letter from LP to Peter Pauling, RE: Informs Peter that he has written to Dr. Grundfest to tell him that he and AHP are not going East until September 3rd, and that they will not be able to make it to Woods Hole. Says that the might buy a car in Detroit to drive home, and that he has decided to buy a Studebaker or Ford. Explains that Mr. Mardian is hoping to have the man who ran into Peter pay $40-$50 a month for a total of $1800. Explains that he is working on the structure of proteins. Handwritten note: “Have decided to buy the Riley. We shall reach Boston Aug. 29, and might possibly visit you.” [Filed under LP Biographical: Personal & Family: (Family Correspondence: Peter Jeffress Pauling, 1939-1953.), Box #5.041, Folder #41.4]

  July 30, 1951

  Dear Peter:

  I have just written to Dr. Grundfest to say that Mamma and I are not going to come East until September 3, and that we are not able to include Woods Hole in our trip. We are now planning to fly directly to New York, and then directly home after the meeting. I have discussed tentatively the possibility of our buying a car which we would pick up in Detroit. If we were to do that, perhaps you would want to drive home with us. However, I am not at all sure about this plan. I have just about decided to buy a Studebaker or Ford or some similar car. Bill Freeman has had excellent service from his Studebaker. I wish that the Studebaker looked better.

  Mr. Mardian is hoping to get the fellow who ran into you to sign up to pay $40 or $50 a month for a total of about $1800.

  I am putting in most of my time now (except that devoted to routine business) in continuing work on the structure of proteins.

  We enjoyed the visit of Linus and Anita and the two little boys immensely.

  Much love from

  [Linus Pauling]

  [handwritten note] *Have decided to buy the Riley. We shall (-och?) Boston Aug. 29, and might possibly visit you."

  Linus Pauling:W

• Letter from LP to Robert S. Mulliken, University of Chicago, RE: Says that he enjoyed having Lucia with them and that a meeting with the Office of Naval Research will prevent him from attending the conference. [Letter from Mulliken to Members July 13, 1951] [Letter from Mulliken to LP August 6, 1951] [Filed under LP Correspondence: (Mulliken, Robert) #251.1]
• Letter from LP to W.H. Freeman and Co., Attn: Miss T. Johnson, RE: Tells her that the change he suggested on page 136 should not be made because the third printing is satisfactory. Explains that he sent in some other corrections on accident because he had been looking at the second edition when he thought it was the third. [Letter from Johnson to LP, July 27, 1951] [Filed under LP Personal Safe, Drawer #2, Folder #2.009]
• Letter from Robert F. Gould, Managing Editor, Chemical and Engineering News, to LP RE: Sends Gould the information he requested about the men who received Ph.D. degrees in chemistry and chemical engineering in June, the titles of their theses, and the names of the professors for whom the research was conducted. [Letter from Gould to LP, July 20, 1951] [Filed under LP Correspondence: (Chemical and Engineering News), #70.3]
• Letter from Stephen Brunauer to LP RE: Tells LP of his resignation from the Navy, and inquires if there are any openings at Caltech. [Letter from LP to Brunauer, August 18, 1951] [Filed under LP Correspondence: (Brunauer, Stephen), #32.6]
• Magazine Article: “World’s Crystallographers Observe Great Progress”, Chemical and Engineering News, Vol. 29, No. 31, July 30, 1951. [Filed under LP Biographical: Scrapbooks, 1951-1955: Box #6.006, Folder 6.7]
• Memo from Verner Schomaker to LP RE: Discusses the structure of the cationic intermediate complex C4H7. [Filed under LP Correspondence: (Schomaker, Verner), #359.1]
• Southern Commercial and Savings Bank Advice of Various Charges for AHP for $1.00. [Filed under LP Biographical: (Business and Financial: Bank Statements and Canceled Checks, September 1950-December 1952), Box #4.021, Folder #21.2]

• Bill from Herbert A. Whipple, D.D.S. to Linda Pauling for $68.00. Handwritten note: “Pd.” [Filed under LP Biographical: Business and Financial: (Assorted Bills, Receipts and Invoices, 1951-1962.), Box #4.060, Folder #60.1]
• Letter from A. L. G. Rees, Australian Scientific Liaison Office, to LP RE: Thanks him for the reply to his request to visit, and accepts the luncheon invitation. [Letter from LP to Rees, July 16, 1951] [Filed under LP Correspondence: (R: Correspondence, 1951), #340.16]
• Letter from Claire A. Padille of Poole and Mardian enclosing a Conditional Release for his signature regarding Pauling vs. Nottingham, #C-288. [Filed under LP Biographical: Legal (Assorted Legal Disputes), Box #3.057, Folder #57.3]
• Letter from Dr. Frederick D. Rossini, Chairman, Committee on Physical Chemistry, Division of Chemistry and Chemical Technology, National Research Council to Members of the Committee on Physical Chemistry, Division of Chemistry and Chemical Technology, NRC RE: Attaches a copy of the report of the Subcommittee on Physico-Chemical Standards and requests their approval or disapproval of the report. [Letter from LP to Rossini August 8, 1951] [Filed under LP Science: (National Research Council, 1950-1992), Box #14.028, Folder #28.1]
• Letter from LP to A. E. van Arkel, Anorgaisch Chemisch Laboratorium, RE: Invites him to visit Pasadena and speak at a chemistry seminar during his upcoming trip to the States. [Letter from van Arkel to LP, August 7, 1951] [Filed under LP Correspondence: (V: Correspondence, 1951), #427.11]
• Letter from LP to Gerson Kegeles RE: States that they do not plan to make an appointment in the instrumentation field so there is little prospect that a position will open up at the Institute that would interest Kegeles. Tells Kegeles that he would be happy to meet with him if his summer visit to San Francisco materializes. [Letter from Kegeles to LP, July 7, 1951] [Filed under LP Correspondence: (K: Correspondence, 1951), #200.16]
• Letter from LP to Gunnar Hagg, Institute of Chemistry, University of Uppsala, RE: Invites Professor Hagg to visit Pasadena if he makes a trip to the west coast. Informs him that a moderate amount of work is being done in their laboratories along the lines of Hagg’s interests. [Letter from Hagg to LP, August 27, 1951] [Filed under LP Correspondence: (H: Correspondence, 1951), #166.2]
• Letter from LP to Harry L. Fisher, National Research Council, RE: Discusses the inability of European scientists, including Dr. Michel Magat and Dr. Rollier, to obtain visas to enter the United States. LP advises that Fisher contact the State Department regarding this matter. [Filed under LP Correspondence: (D: Correspondence, 1951), #98.16]
• Letter from LP to Sir John Lennard-Jones, University of Cambridge, RE: States that he is pleased that Lady Lennard-Jones and he will be visiting New York in September, and inquires if they plan on traveling west. Invites them to stay with AHP and he if they visit Pasadena. [Letter from Lennard-Jones to LP, August 10, 1951] [Filed under LP Correspondence: (Lennard-Jones, John E.), #215.4]
• Letter from LP to Sir Robert Robinson, Dyson Perrins Laboratory, RE: Expresses his hope that he and Lady Robinson will be able to make a trip to the Pacific Coast. Discusses arrangements and Caltech’s support for such a visit. Mentions that Taylor asked him to come to Jamaica for a ceremony because Robinson was unable to do so. States that he is continuing his protein work. [Note from Robinson to LP, August 15, 1951] [Filed under LP Correspondence: (Robinson, Robert), #335.2]
• Letter from W.J. King, Lt. Col., MPC, Army Alternate Member, to LP, RE: Notifies him that his request for access to certain classified matter at CIT has been submitted to the Army-Navy-Air Force Personnel Security Board for review. Explains why consent for access was denied. Tells LP that he may submit any information in writing to refute what he stated above, but has no right to appear before the Board in person or be represented by counsel. Explains that he may appeal to the Industrial Employment Review Board if the decision is adverse. [Filed under LP Personal Safe, Drawer #1, Folder #1.032]
• Memo from President L.A. DuBridge to LP RE: Notifies him that his Task Order has been accepted by the Committee on Government and Industrial Contracts, and he also adds his approval. [Memo from Lindvall to DuBridge July 25, 1951] [Memo from Walter to Gilmore November 8, 1951] [Filed under LP Science: (Office of Naval Research: Correspondence, Contract Status Reports and Project Status Reports, 1947-1962), Box #14.031, Folder #31.5]
• Note from John C. Kendrew to LP RE: Says that he will arrive in Los Angeles on August 5th and will stay in Pasadena until August 9th. Handwritten notes about the his flight and pick-up arrangements. [Filed under LP Correspondence: (Kendrew, John), #197.16]