- Letter [in German] from Prof. Dr. R. Mecke to LP RE: Submits to him the first reprint to be published since the war, entitled “Empfindliche KapazitÃ¤tsmessungen mit DoppelrÃ¶hrenvoltmeter und Spannungsteiler.” [Filed under LP Correspondence: Box #255.15, file:(M: Correspondence, 1948)]
- Letter from LP to Charles Schauer RE: Sends his opinions on Sidney Benson in connection with Benson's request for grant monies. [Letter from Schauer to LP April 1, 1948]
- Letter from LP to Dr. Ronald S. Nyholm, Chemistry Department, University College London, RE: Discusses briefly Nyholm's comments on tertiary arsines, mentioning that Ingold informed him that the small number of compounds formed by alkyl amines was due to the theory of distribution of charge. States this may be similar in tertiary arsines and phosphines. [Letter from Nyholm to LP April 6, 1948] [Filed under LP Correspondence: Box #279.7, file:(Nyholm, Ronald S.)]
- Letter from LP to Dunod, French Translator. RE: LP informing him that it would be great to have a French translation, but that he should contact Cornell University Press before doing so to come to common terms of sales. [Filed under: LP Manuscripts of Books, 1939b.2]
- Letter from LP to E. K. Wickman, Director, The Commonwealth Fund RE: Says his reply was delayed due to trips, says they would be happy to have Dr. John Sheridan at Caltech, hopes he is successful in getting a Commonwealth Fund Fellowship as he is interested in the program he proposes, and says he has not met him but Sidgwick and Haworth have made it clear he is a first rate man. [Letter from Wickman to LP April 21, 1948] [Filed under LP Correspondence: 378.2]
- Letter from LP to Hugh Bryson, Independent Progressive Party, RE: Regrets he cannot accept the nomination to serve on the interim State Central Committee as he will be in Europe until September 19th. Hope he can be of use at a future date. [Letter from Bryson to LP April 7, 1948] [Filed under LP Correspondence: Box #185.9, file:(I: Correspondence, 1948)]
- Letter from LP to Miss Jean L. Harvey, New Hampshire teacher. RE: Answering her question about resonance states, and providing some extra material that could help her understand better. [Filed under: LP Manuscripts of Books, 1939b.2]
- Letter from LP to Prof. J. H. Sturdivant, Caltech. [Letter from Unicam Instruments (Cambridge) Ltd. April 26, 1948] [Filed under LP Correspondence: 370.3]
A. AIR MAIL Balliol College
May 4, 1948
Professor J. H. Sturdivant
California institute of Technology
Pasadena 4, California
I enclose some material about Unicam instruments, with the suggestion that you order an apparatus immediately, in case that one of the Unicam instruments has not already been ordered. I think that it could be paid for from any suitable fund, including the Rockefeller Fund.
It might well be that two of the instruments should be ordered, such as the single crystal goniometer and the two crystal goniometer.
I feel that it is important that we increase the facilities for x-ray photography at the institute. I was very much interested to see what they have in the x-ray lab at the Cavendish Laboratory, where H. B. Taylor is in charge. They have in one room, about 50% larger than our x-ray lab, a number of transformers and x-ray tubes, with associated apparatus. The total number of "windows" in this lab is 25—-most of the tubes have two windows, one on each of two sides, and in general they seem to operate two tubes from the same transformer. There is a bank of six transformers with controls down the center of the room, with an x-ray tube on each of two sides of each transformer, and an apparatus on each side of each x-ray tube. This gives 24 windows—I don't know where the 25th is. In addition they have a teaching laboratory with four windows, which is used only one term in the year for teaching, and is available for research the rest of the time. They use the multiple film technique for intensities, and seem to have some sort of photometric method of obtaining intensities, without, however, doing much in the way of integrating over the spot.
I must say that I think that there is one advantage to the English system, which is that research men are supposed to devote all of their time to research, rather than only half time or less. They do attend a few lectures, but not very many. It seems to me that perhaps we should revise our system somewhat, and have our graduate students take class work completely during the first year, and then practically 100% research during the other two years. The disadvantage to this is, of course, that we do not find out whether the man has any research ability during his first year.
Prof. Sturdivant May 4, 1948
They have been doing some interesting jobs at Cambridge. Two of the pyrimidine structures, that I saw last summer under way, are described in the first issue of Acta Crystallographica. They are finishing up a purine now. Corey would be interested to know that this work on pyrimidines and purines is designed as a start in an attack on nucleic acids. Also a girl there, Mrs. Douglas, has just finished determining the structure of a complicated intermetallic compound, Co2Al9, which has monoclinic symmetry. There are a number of other representatives of this structure. She is also beginning work on MnAl6. Their general program is to tackle the compounds of aluminum and the iron-group transition elements. In addition they have made some studies of the sigma-phase of chromium and iron, containing 50% of each of these two elements. This phase is a complicated powder diagram, which is, however, closely related to the body-centered structure. Instead of the successive lines of the body-centered structure, there is, in the general neighborhood of each of these lines, a complex of a half-dozen or more lines. They have not yet found out what the unit of structure is for this sigma phase. The single crystals of Co2Al9 and MnAl6, that they use are made by an interesting method, of annealing the an alloy with an excess of aluminum or cobalt--I am not sure which--and then subjecting the sample to electrolytic etching until the phase that is the more readily attacked is dissolved away, leaving a pile of crystals of the other phase. These crystals are perhaps two- or three- or four-tenths of a millimeter in two directions, and several millimeters along the needle axis.
There are three men working with Taylor on the structure of feldspar. They find, for example, that the first feldspars give rotation photographs corresponding to the normal feldspar
structure, but with faint extra layer lines in between the strong layer lines. These faint layer lines indicate a unit either five times or seven times longer in the direction of the axis of rotation. Moreover, the two extra layer lines that are nearest to half-way between the main layer lines are strong, the others being very weak. This indicates an approximate doubling of the c axis. The explanation presumably is that the two kinds of feldspar structure, say a and b, tend to repeat, but not exactly, the sequences being ababa ababa or abababa abababa. It is clear that many interesting things remain to be done in this field. The difficulty in this feldspar work is that it is almost impossible to obtain single crystals of the micro-type feldspars that they are studying, the ordinary apparent single crystals being complex twins. The girl who has been making these photographs has taken an apparent single crystal, made x-ray photographs of it (Laue photographs), chipped off a piece, repeated the x-ray photographs, and continued until she obtained a small piece that gave a simple Laue diagram.
Prof. Sturdivant May 4, 1948
The piece that she obtained was about 0.02 X 0.02 X 0.01 millimeters, and yet they have used it to get first-rate rotation and Weissenberg photographs.
I am looking forward to getting back, and to talking with you about the x-ray work. I hope that you aren't working too hard now.
- Letter from LP to Prof. Lloyd A. Jeffress RE: Thanks Jeffress for keeping an eye on the Pauling's financial matters in Pasadena. Discusses the family's time in Paris, mentioning his attack of sinusitis, but stating that the children immensely enjoyed the trip. Regrets that they may not be able to go to Scandinavia later in the year. Describes travels in Scotland and northern England. Discusses Crellin's progress in school. [Letter from Jeffress to LP March 31, 1948] [Filed under LP Correspondence: Box #189.1, file:(Jeffress, Lloyd A.)]
- Letter from LP to Prof. R. C. Gibbs, NRC RE: LP suggests that he not be included as a member of the Executive Committee of the American Section of the International Union of Crystallography as he will be out of the country for such a long time, but is willingly to remain a member as to give moral support, etc. [Filed under LP Science: National Research Council, 1925-1950: Box #14.027 Folder #27.4]
- Letter from LP to Professor T. S. Wheeler, Department of Chemistry, University College in Dublin RE: Thanks him for his invitation, regrets that he cannot accept it as he has previous engagements for all those times already, explains that he has stopped accepting speaking engagements, and hopes that he can come visit Dublin another time. [Letter from Wheeler to LP April 15, 1948] [Filed under LP Correspondence: (Oxford University, [re: Eastman professorship and residency in Oxford] 1946-1948), #299.8]
- Letter from LP to the Fellowship Div., U.N.E.S.C.O., RE: Writes about Dr. Camille Sandorfy's application to U.N.E.S.C.O. for a fellowship to he may work in the U.S. Recommends that Sandorfy be granted this application. [Letters from Eleanor T. Middleditch to LP March 11, 1948, from William D. Carter to LP May 11, 1948] [Filed under LP Correspondence: #357.2]
- Letter from Mrs. J. C. Low to Dr. Albert Einstein, Chairman, Emergency Committee of Atomic Scientists. Writes that she things the Catholic Church and the Federal Council of Churches should speak up against atomic bombs. LP Peace: Box 3.005, Folder 5.3
- Letter from Mrs. R. B. Conroy, Secretary, National Research Council to Dr. F. D. Rossini, cc: all committee members RE: Reorganization of the Division of Chemistry and ChemiCaltechnology's Committee on Physical Chemistry. [Filed under LP Science: National Research Council, 1925-1950: Box #14.027 Folder #27.4]
- Letter from R. Kingan, British Chemical Warfare Representative, British Joint Services Mission, to LP [Director, Gates and Crellin Laboratory, Caltech] RE: Introduces L.H. Kent who will be in Los Angeles from May 9th to May 12th and would like to visit the labs. [Filed under LP Correspondence: Box #200.13, file:(K: Correspondence, 1948)]
- Manuscript: Interaction of Two Harmonic Oscillators, Oxford Lectures, Lecture 3, England. [Filed under: LP Speeches, 1948s.36]
- Newspaper Clipping: “Professor Pauling's Lecture”, The Yorkshire Post and Leeds Mercury, May 4, 1948. [Filed under LP Scrapbooks, 1946-1950: Box #6.005, Folder 5.22]