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September 1  (Los Angeles, CA)
  • AHP writes cheque to: Mr. A. H. Shaw amount $3.20 [Filed under LP Biographical: Box #4.011, Folder #3]
  • Memorandum cheque notifying LP of $50 transfer among accounts [Filed under LP Biographical: Box #4.011, Folder #3]

September 6

September 7
  • AHP writes cheque to: Athenaeum amount $5.75 [Filed under LP Biographical: Box #4.011, Folder #3]
  • AHP writes cheque to: Sears, Roebuck and Co. amount $8.84 [Filed under LP Biographical: Box #4.011, Folder #3]
  • Withdrawal receipt for LP amount $50 [Filed under LP Biographical: Box #4.011, Folder #3]

September 8
  • AHP writes cheque to: A. H. Shaw amount $3.35 [Filed under LP Biographical: Box #4.011, Folder #3]
  • AHP writes cheque to: Sanitary Laundry amount $4.60 [Filed under LP Biographical: Box #4.011, Folder #3]
  • AHP writes cheque to: William D. Crane amount $100 [Filed under LP Biographical: Box #4.011, Folder #3]

September 13

September 15
  • LP writes cheque to: Professor A. A. Noyes amount $800 [Filed under LP Biographical: Box #4.011, Folder #3]
  • Reprint: Impacts of Fast Electrons and Magnetic Neutrons, by: J. F. Carlson and J. R. Oppenheimer. [Filed under LP Correspondence: Box #296, Folder #296.2]

September 17
  • Handwritten note from F.J. Allen to LP, RE: Tells LP that he would be glad to send the Xenon to him. Explains that it will be a few days before he can prepare a sample, because new plumbing is being installed in his laboratory. Notes that they bought a house last spring and that his son James is now 7 months old. [Filed under LP Personal Safe: Drawer 3, Folder 3.018.2]

September 18
  • LP Research Notebooks, RNB 07 RE: Indates, Stannates, Antimonates, Tellurates, Periodates, Perchlorates. [Filed under LP Research Notebooks: Research Notebook 7: 063-065]

September 19
  • AHP writes cheque to: Curtis Studios amount $20 [Filed under LP Biographical: Box #4.011, Folder #3]

September 21
  • LP makes a note to himself that introduces the idea of writing a freshman chemistry textbook (1941b.16). [LP Biographical: Academia Box 1.010, Folder 5]

September 22
  • Letter from P.P. Ewald, Zeitschrift fur Kristallographie / Abteilung A, to LP, RE: Thanks LP for his letter and the paper by Dr. Hoard and Dickinson. Notes that they have a Lehrauftrag in chemical physics for Dr. Huckel which has worked well for two years. Lets LP know that he is satisfied that the structure papers are going to be handed over to the Z.Krist. Replies that he hopes to finish his manuscript for the 2nd edition of the Handbuch article in a few weeks and then after getting that and the Rektorat finished, he will work on his book. [Filed under LP Personal Safe: Drawer 3, Folder 3.018.68]

September 24
  • AHP writes cheque to: A. H. Shaw amount $1.60 [Filed under LP Biographical: Box #4.011, Folder #3]
  • AHP writes cheque to: Matthews amount $9.02 [Filed under LP Biographical: Box #4.011, Folder #3]
  • AHP writes cheque to: Model Grocery amount $2.00 [Filed under LP Biographical: Box #4.011, Folder #3]
  • Letter from Harold C. Urey, Columbia University, to LP RE: Asks LP to send the paper for the first number of the Journal of Chemical Physics on transitions in solids that he promised to send. Asks that it be sent as soon as possible so the issue can be put out soon. [Filed under LP Personal Safe: Drawer 3, Folder 3.018.160]

September 27
  • AHP writes cheque to: cash amount $2.50 [Filed under LP Biographical: Box #4.011, Folder #3]
  • Withdrawal receipt for LP amount $25 [Filed under LP Biographical: Box #4.011, Folder #3]

September 29
  • AHP writes cheque to: Helen Daugherty amount $40 [Filed under LP Biographical: Box #4.011, Folder #3]

September 30
  • Handwritten note from Peter Debye, Department of Physics at the University of California to LP, RE: Informs LP that he and his wife are in Berkeley and plan to visit Pasadena on his way back east. Asks LP what date would be good for him to see LP in his laboratory and tell LP that he's asked Professor Millikan the same question. Handwritten note by LP: "Prof. Millikan will ask if he will talk at 5 on Tues. + Sat. morning or Mon. PM. asked to dinner Mon night Oct. 17th." [Filed under LP Personal Safe: Drawer 3, Folder 3.018.49]