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April
  • LP Research Notebooks, RNB 07 RE: Notes and X-ray diffraction data-CaB6 [LP and Sidney Weinbaum] [Filed under LP Research Notebooks: Research Notebook 7: 236-237, 239]

April 1  (Berkeley, CA)
  • AHP writes cheque to: Nora Gand Miller amount $5 [Filed under LP Biographical: Box #4.012, Folder #1]
  • LP writes cheque to: American Trust Company amount $15 [Filed under LP Biographical: Box #4.012, Folder #1]
  • Memorandum cheque notifying LP of $75 transfer among accounts [Filed under LP Biographical: Box #4.012, Folder #1]

April 3  (Berkeley, CA)
  • Manuscript: Triphenylmethyl, Ninth Lecture, Berkeley Lectures -- The Electronic Structure of Molecules with Especial Reference to the Resonance of Molecules Among Several Electronic Structures, University of California, Berkeley, April 3, 1933. [LP Science Box 2.002, Folder 6/LP Speeches 1933s.9]

April 4  (Berkeley, CA)
  • Note from Bright Wilson Jr. To LP RE: Wilson thinks it is an excellent idea for LP to write a book on chemical physics by himself. Goes on to inquire about Morse's work that has been published in two separate issues. [Filed under: W: Individual Correspondence, box #438.5]

April 5  (Berkeley, CA)
  • LP writes cheque to: American Trust Company amount $25 [Filed under LP Biographical: Box #4.012, Folder #1]
  • LP writes cheque to: Dr. Jack Sherman amount $12 [Filed under LP Biographical: Box #4.012, Folder #1]
  • Manuscript: Various Hydrocarbon Free Radicals, Tenth Lecture, Berkeley Lectures -- The Electronic Structure of Molecules with Especial Reference to the Resonance of Molecules Among Several Electronic Structures, University of California, Berkeley, April 5, 1933. [LP Science Box 2.002, Folder 6/LP Speeches 1933s.10]
  • Note from Willard Wheland to LP RE: Wheland returns to LP his notes on the free-radical calculations after making the necessary corrections. Wheland lists the energies and goes on to explain his work.

April 6  (Berkeley, CA)
  • AHP writes cheque to: Berkeley Ice Company amount $1.40 [Filed under LP Biographical: Box #4.012, Folder #1]
  • AHP writes cheque to: City of Pasadena amount $6.48 [Filed under LP Biographical: Box #4.012, Folder #1]
  • AHP writes cheque to: Dr. Wm. D. Donald amount $3.50 [Filed under LP Biographical: Box #4.012, Folder #1]
  • AHP writes cheque to: Golden State Company, Ltd., amount $17.63 [Filed under LP Biographical: Box #4.012, Folder #1]
  • AHP writes cheque to: Lincoln Market amount $9.86 [Filed under LP Biographical: Box #4.012, Folder #1]
  • AHP writes cheque to: Los Angeles Gas and Electric Corporation amount $14.72 [Filed under LP Biographical: Box #4.012, Folder #1]
  • AHP writes cheque to: William D. Crane amount $85 [Filed under LP Biographical: Box #4.012, Folder #1]

April 7  (Berkeley, CA)
  • AHP writes cheque to: Rotary Oil Company amount $3 [Filed under LP Biographical: Box #4.012, Folder #1]
  • LP writes cheque to: Faculty Club amount $6.85 [Filed under LP Biographical: Box #4.012, Folder #1]
  • LP writes cheque to: Mrs. R. M. Officer amount $45 [Filed under LP Biographical: Box #4.012, Folder #1]
  • Letter from Philip M. Morse to Mr. E. Bright Wilson, Jr. RE: Morse does not believe that he is duplicating Wilson's work and suggests that he continue with it as he would have priority for publishing. [Filed under: W: Individual Correspondence, Box #438.5
  • Manuscript Notes: The Calculation of Resonance Energies from Thermochemical Data, Eleventh Lecture, Berkeley Lectures -- The Electronic Structure of Molecules with Especial Reference to the Resonance of Molecules Among Several Electronic Structures, University of California, Berkeley. [LP Science Box 2.002, Folder 6/LP Speeches 1933s.11]

April 8  (Berkeley, CA)
  • LP writes cheque to: Faculty Club amount $10 [Filed under LP Biographical: Box #4.012, Folder #1]
  • Letter from Arthur A. Noyes to LP, RE: Tells LP that he will have left Pasadena before LP returns. Says that he is glad to hear that Bray and Lewis are going East. Explains that he suggested to Keyes that LP give and address, but that Keyes arranged to have Dr. Kraus give one instead. Tells LP that they had a visit from Beach. Discusses the experiment begun by himself and Wada. Informs LP that Wall accepted the Athenaeum plan and that they offered Gross the opportunity to work with Yost. Tells LP of appointments made at a recent meeting of the Trustees. Handwritten note by LP [referring to Wall]: "But he was displeased and left after one year." [Filed under LP Personal Safe: Drawer 2, Folder 2.018.12]

April 10  (Berkeley, CA)
  • AHP writes cheque to: Athenaeum amount $3.48 [Filed under LP Biographical: Box #4.012, Folder #1]
  • AHP writes cheque to: Bullock's amount $33.75 [Filed under LP Biographical: Box #4.012, Folder #1]
  • AHP writes cheque to: F. C. Nash and Company amount $2.05 [Filed under LP Biographical: Box #4.012, Folder #1]
  • AHP writes cheque to: Model Grocery Company amount $5.88 [Filed under LP Biographical: Box #4.012, Folder #1]
  • AHP writes cheque to: Southern California Telephone Co., amount $3.72 [Filed under LP Biographical: Box #4.012, Folder #1]
  • AHP writes cheque to: Standard Oil Company California amount $7.05 [Filed under LP Biographical: Box #4.012, Folder #1]
  • Handwritten note from Dr. Yost to LP, RE: Asks him to write to the man who has the xenon supply to ask if he could send another portion of it. Discusses the photochemical experiments they have done and those they plan to do with more material. [Filed under LP Personal Safe: Drawer 3, Folder 3.018.5a]
  • Note to Self: Fowler has asked if LP wants to publish the Chemical Bond book or Quantum Mechanics of Chemical Molecules in the Oxford series and he promises good type-setting. [LP Science Box 2.002, Folder 6]

April 12  (Berkeley, CA)
  • AHP writes cheque to: Rotary Oil Company amount $8.76 [Filed under LP Biographical: Box #4.012, Folder #1]
  • Manuscript, Notes: The Three-electron Bond, Thirteenth Lecture, Berkeley Lectures -- The Electronic Structure of Molecules with Especial Reference to the Resonance of Molecules Among Several Electronic Structures, University of California, Berkeley. [LP Science Box 2.002, Folder 6/LP Speeches 1933s.12]

April 13  (Berkeley, CA)
  • LP and J. Sherman. "The Nature of the Chemical Bond. VI. The Calculation from Thermochemical Data of the Energy of Resonance of Molecules Among Several Electronic Structures." Journal of Chemical Physics 1: 606-617. Received for publication April 13, 1933, published August 1933. [Filed under LP Publications: Box 1933p, Folder 1933p.11]
  • Letter from LP to Sam Goudsmit. RE: Couldn't reach Ann Arbor, but is looking forward to seeing him in Washington. Has AHP with him. Is sorry to hear of Professor Randall's illness. [Filed under LP Correspondence: G: Individual Correspondence, Box #137.4]

April 14  (Berkeley, CA)
  • AHP writes cheque to: Jevons Plumbing amount $1.25 [Filed under LP Biographical: Box #4.012, Folder #1]
  • LP writes cheque to: American Trust Company amount $25 [Filed under LP Biographical: Box #4.012, Folder #1]
  • Manuscript: The Nitric Oxide Molecule, Fourteenth Lecture, Berkeley Lectures -- The Electronic Structure of Molecules with Especial Reference to the Resonance of Molecules Among Several Electronic Structures, University of California, Berkeley. [LP Science Box 2.002, Folder 6/LP Speeches 1933s.13]

April 16  (Berkeley, CA)
  • Letter from A. A. Noyes to E. B. Wilson, Jr. RE: Informing him that upon the recommendation of Noyes and LP, he has been elected a Research Fellow in Chemistry. [LP Science Box 14.037, Folder 2]
  • Letter from Arthur A. Noyes to LP (at Berkeley) RE: Requests LP review the announcements of appointments from the Rockefeller Fund before they are sent to the individuals. Noyes is headed to the East coast.(Individual letters attached) [LP Science Box 14.037, Folder 2]

April 17  (Berkeley, CA)
  • LP writes cheque to: The Lido Caf amount $10 [Filed under LP Biographical: Box #4.012, Folder #1]
  • Letter from A. A. Noyes to G. W. Wheland RE: Informing him that upon the recommendation of Noyes and LP, he has been elected a Research Fellow in Chemistry. (Refer to Noyes' letter April 16, 1933) [LP Science Box 14.037, Folder 2]
  • Letter from A. A. Noyes to J. Holmes Sturdivant RE: Informing him that upon the recommendation of Noyes and LP, he has been elected a Research Fellow in Chemistry. (Refer to Noyes' letter April 16, 1933) [LP Science Box 14.037, Folder 2]
  • Letter from A. A. Noyes to J. Sherman RE: Informing him that upon the recommendation of Noyes and LP, he has been elected a Research Fellow in Chemistry. (Refer to Noyes' letter April 16, 1933) [LP Science Box 14.037, Folder 2]
  • Letter from A. A. Noyes to Lawrence O. Brockway RE: Informing him that upon the recommendation of Noyes and LP, he has been elected a Research Fellow in Chemistry. (Refer to Noyes' letter April 16, 1933) [LP Science Box 14.037, Folder 2]
  • Letter from A. A. Noyes to Sidney Weinbaum RE: Informing him that upon the recommendation of Noyes and LP, he has been elected a Research Assistant in Chemistry. (Refer to Noyes' letter April 16, 1933) [LP Science Box 14.037, Folder 2]
  • Manuscript: Continuation on Three-electron Bond, Fifteenth Lecture, Berkeley Lectures -- The Electronic Structure of Molecules with Especial Reference to the Resonance of Molecules Among Several Electronic Structures, University of California, Berkeley. [LP Speeches 1933s.14]

April 20
  • LP writes cheque to: American Trust Company amount $50 [Filed under LP Biographical: Box #4.012, Folder #1]

April 21
  • LP writes cheque to: Faculty Club amount $10 [Filed under LP Biographical: Box #4.012, Folder #1]
  • Letter from Edwin Kremble, Harvard University, to LP RE: Tells LP of his plans to work on the anomalous excited states of lithium hydride because James has reminded him that LP mentioned lithium hydride in one of his letters and they do not want to tread on each others toes. [Filed under LP Personal Safe: Drawer 3, Folder 3.018.115]

April 22
  • AHP writes cheque to: Nipon Laundry amount $12.39 [Filed under LP Biographical: Box #4.012, Folder #1]
  • LP writes cheque to: American Trust Company amount $25 [Filed under LP Biographical: Box #4.012, Folder #1]

April 26