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July 1
  • AHP writes cheque to: Mrs. M. M. Fillmore amount $11 [Filed under LP Biographical: Box #4.011, Folder #2]
  • LP writes cheque to: Hancock Music Company amount $37 [Filed under LP Biographical: Box #4.011, Folder #2]
  • Reprint: "Relativistic Theory of the Photoelectric Effect," by: Harvey Hall and J. R. Oppenheimer. [Filed under LP Correspondence: Box #296, Folder #296.2]
  • Reprint: Bridgman, P. W. "P-V-T relations of NH4Cl and NH4Br, and in particular the effect of pressure on the volume anomalies." Physical Review 38: 182-191. [LP Science Box 14.037, Folder 1]

July 2
  • LP writes cheque to: Teachers Insurance and Annuity Association of America amount $13.10 [Filed under LP Biographical: Box #4.011, Folder #2]

July 3
  • AHP writes cheque to: A. C. Vroman, Inc. amount $1 [Filed under LP Biographical: Box #4.011, Folder #2]
  • AHP writes cheque to: Athenaeum amount $2.96 [Filed under LP Biographical: Box #4.011, Folder #2]
  • AHP writes cheque to: Barker Brothers amount $46 [Filed under LP Biographical: Box #4.011, Folder #2]
  • AHP writes cheque to: City of Pasadena amount $3.09 [Filed under LP Biographical: Box #4.011, Folder #2]
  • AHP writes cheque to: City of Pasadena amount $3.42 [Filed under LP Biographical: Box #4.011, Folder #2]
  • AHP writes cheque to: Commercial Credit Company amount $23.30 [Filed under LP Biographical: Box #4.011, Folder #2]
  • AHP writes cheque to: Encyclopedia Britannica amount $16.30 [Filed under LP Biographical: Box #4.011, Folder #2]
  • AHP writes cheque to: F. C. Nash and Company amount $16.50 [Filed under LP Biographical: Box #4.011, Folder #2]
  • AHP writes cheque to: Golden State Company, Ltd. amount $9.21 [Filed under LP Biographical: Box #4.011, Folder #2]
  • AHP writes cheque to: Los Angeles Gas and Electric Company amount $6.38 [Filed under LP Biographical: Box #4.011, Folder #2]
  • AHP writes cheque to: Mrs. M. M. Fillmore amount $8 [Filed under LP Biographical: Box #4.011, Folder #2]
  • AHP writes cheque to: Southern California Telephone Company amount $2.90 [Filed under LP Biographical: Box #4.011, Folder #2]
  • AHP writes cheque to: T. W. Mather Company amount $51.25 [Filed under LP Biographical: Box #4.011, Folder #2]
  • AHP writes cheque to: William D. Crane amount $91.33 [Filed under LP Biographical: Box #4.011, Folder #2]
  • LP writes cheque to: Cash amount $50 [Filed under LP Biographical: Box #4.011, Folder #2]
  • LP writes cheque to: Cecil E. Reece amount $33.85

July 4
  • AHP writes cheque to: Mrs. Eunice Hodges amount $4 [Filed under LP Biographical: Box #4.011, Folder #2]

July 8

July 9
  • Handwritten note from LP to John, RE: Suggests that he spends May at MIT. Asks Slater to let him know if this plan is agreeable with him, what the financial arrangements would be, and what lectures LP would be giving. Suggests that lectures on the empirical material or crystal structure and the chemical bond be given. [Letter from Slater to LP, July 13, 191931] [Filed under LP Personal Safe: Drawer 2, Folder 2.003.41]

July 10

July 11
  • Letter from Assistant Treasurer, Teachers Insurance and Annuity Association of America, to LP RE: Encloses a premium receipt and a check for $5 to reimburse LP for the expense of the medical exam. [Filed under: LP Biographical: Business and Financial, Box #4.042.7]

July 13
  • Letter from John C. Slater, Massachusetts Institute of Technology Department of Physics, to LP, RE: Tells LP that April and May would be a good time for him to come to MIT. Says that he can not say anything about financial arrangements until he talks to Compton and that he would like to consult with others before telling LP would the topics of his lectures should be, but that he thinks LP's suggestions are good. Informs LP that the plans for the dedication ceremony have not been solidified yet. Discusses things at Berkeley. [Handwritten note from LP to Slater, July 9, 191931] [Filed under LP Personal Safe: Drawer 2, Folder 2.003.42]

July 14
  • LP writes cheque to: Cash amount $50 [Filed under LP Biographical: Box #4.011, Folder #2]

July 15
  • AHP writes cheque to: Mrs. M. M. Fillmore amount $10 [Filed under LP Biographical: Box #4.011, Folder #2]

July 16

July 17

July 20
  • Letter from H. Mark to LP RE: Written in German. Thanks LP for his letter and the congratulations on his second boy. States that his work suffers due to the economic depression and that they had to abandon their visit to Dr. Wierl in Pasadena. Is pleased that LP also works in the electron reflection field. Will send LP a reprint of his and Wierl's results from their electron reflections. Complements LP on his research-always bringing chemistry and physics together. [Filed under LP Personal Safe: Drawer 3, Folder 3.018.189]

July 21
  • LP writes cheque to: Cash amount $25 [Filed under LP Biographical: Box #4.011, Folder #2]

July 22
  • AHP writes cheque to: Mrs. M. M. Fillmore amount $10.05 [Filed under LP Biographical: Box #4.011, Folder #2]
  • AHP writes cheque to: Sanitary Laundry amount $2.38 [Filed under LP Biographical: Box #4.011, Folder #2]
  • Letter from Arthur B. Lamb, Editor, Journal of the American Chemical Society to LP RE: Thanks LP for his opinion of the Note by Dr. Rawlins, the Journal will not publish his paper. He would like LP's opinion on a similar note he has received from Dr. Huggins. He also would like LP to prepare a brief review of a supplementary volume of the Zeitschrift fr Kristallographie. [LP's letter to Lamb July 17, 1931; LP's reply to Lamb July 30, 1931] [LP Science Box 14.002, Folder 1]
  • Letter from M. Gomberg, President of the American Chemical Society to LP RE: More information concerning the topic of LP's lecture at the Buffalo meeting. [LP's letter to Gomberg July 10, 1931] [LP Scrapbooks 6.002.1]

July 25
  • AHP writes cheque to: Sanitary Laundry amount $2.63 [Filed under LP Biographical: Box #4.011, Folder #2]
  • LP writes cheque to: Sears, Roebuck and Co. amount $21.25 [Filed under LP Biographical: Box #4.011, Folder #2]

July 27
  • Letter from Robert E. Swain, Stanford University Department of Chemistry, to LP, RE: Tells LP that they might like to have him come for a series of lectures in the future. Says that they have not made a regular appointment in physical chemistry for the next year and that an offer was made to Bjerrum some time ago, but he declined. [Filed under LP Personal Safe: Drawer 2, Folder 2.003.33]
  • Note from Simon Freed to LP RE: Complimenting LP on his first paper in what is to become "The Nature of the Chemical Bond" series. [LP Scrapbooks 6.002.2]

July 28
  • Letter from Charles L. Parsons, Secretary of the American Chemical Society to LP RE: Requesting LP inform him how he would like his award certificate made out. He also inquires about the length of LP's intended talk. [LP's reply to Parsons July 31, 1931] [LP Scrapbooks 6.002.1]
  • Returned Check Charge of $0.50 to LP for cheque of $21.25 [Filed under LP Biographical: Box #4.011, Folder #2]

July 29
  • AHP writes cheque to: Mrs. M. M. Fillmore amount $10.80 [Filed under LP Biographical: Box #4.011, Folder #2]

July 30

July 31