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October 1
  • Letter from James S. Thompson, VP McGraw-Hill Book Company Inc., to LP RE: Asks LP to please respond with his opinion regarding the author correction charges as soon as possible because they would like to wrap up any unfinished business soon. [Filed under: LP Books, 1930b.4]

October 7
  • Letter from LP to H. Bateman, RE: After considering Bateman's suggestion that he lease a house with an option to buy it, LP has decided to adhere to his original decision not to do so. He feels that his future is not secure enough for him to enter a contract that will last a long period of time. [Bateman's letter: NaN, 30 S] [Filed under LP Safe Contents: Drawer 2, Folder 2.039.76b]

October 8
  • AHP writes cheque to: Myself amount $25 [Filed under LP Biographical: Box #4.011, Folder #1]
  • LP writes cheque to: Consumer's Research, Inc. amount $2.00 [Filed under LP Biographical: Box #4.011, Folder #1]
  • Letter from H. Bateman to LP, RE: Bateman thinks LP's decision not to buy the house is a wise one, especially if the large monthly payments would hinder him financially. [LP's letter: NaN, 7 Oc] [Filed under LP Safe Contents: Drawer 2, Folder 2.039.76c]

October 9
  • LP writes cheque to: Leo G. MacLaughlin Co. amount $235 [Filed under LP Biographical: Box #4.011, Folder #1]

October 10
  • LP writes cheque to: Cash amount $50 [Filed under LP Biographical: Box #4.011, Folder #1]

October 14

October 15
  • LP writes a cheque to: Cazel Co. amount $33.85 [Filed under LP Biographical: Box #4.011, Folder #1]

October 16
  • LP writes cheque to: Barker Bros. amount $175 [Filed under LP Biographical: Box #4.011, Folder #1]
  • LP writes cheque to: The May Company amount $40
  • Letter from S. Goudsmit, University of Michigan to LP RE: Goudsmit writes to LP concerning the author correction fees for Structure of Line Spectra and includes correspondence between himself and the publisher regarding a second printing of the book. Finally, he updates LP on his work and requests that they get together soon to finish up their research together. [Filed under: LP Books, 1930b.4]

October 20
  • LP writes cheque to: Athenaeum amount $2 [Filed under LP Biographical: Box #4.011, Folder #1]
  • LP writes cheque to: Self amount $50 [Filed under LP Biographical: Box #4.011, Folder #1]
  • Letter from Wm. Lloyd Evans, Chairman of the Department of Chemistry at the Ohio State University, to LP, RE: Thanks LP for sending him a copy of "The Structures of Line Spectra." Asks if it would be possible for LP to come to their campus to work during either the upcoming winter or spring quarter and explains the work they would like him to do while there. Notes that Drs. Lande and Llewellyn Thomas are at Ohio State University presently, and that Drs. Tibor Rado, Lincoln Lapaz, and Frederick Bamforth joined the Department of Mathematics that summer. [Filed under LP Personal Safe: Drawer 3, Folder 3.018.69]

October 21
  • Letter from LP to Sam Goudsmit. RE: Is glad he is not angry that LP did not write often. Thinks that they should only correct misprints. Discusses corrections to be made. Discusses his work with hyperfin structure separations. Gives his reasons for not stopping in Ann Arbor. [Filed under LP Correspondence: G: Individual Correspondence, Box #367.4]

October 28
  • Letter from S. Goudsmit to LP RE: Thanks LP for his letter regarding the corrections and explains that he put in a reference to Richtmyer on page 194. Wonders what they should do about the author correction fees. [Filed under: LP Books, 1930b.4]

October 29
  • Letter from James S. Thompson, VP McGraw-Hill Book Co., to LP and S. Goudsmit RE: Asks that LP and Goudsmit respond immediately regarding the author correction fees and hopes that they are satisfied with the agreement. [Filed under: LP Books, 1930b.4]

October 31
  • Letter from LP to Sam Goudsmit. RE: Encloses a letter to McGraw-Hill about the author corrections. Asks him to send it on if he agrees. Discusses other changes to be made. Discusses his current work and his new house. [Filed under LP Correspondence: G: Individual Correspondence Box #137.4]