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• Reprint: Govinda Rau, M. A. Intra-molecular rotation in organic compounds. Current Science 3 (4): 145-150. [LP Science Box 14.037, Folder 1]

• AHP writes cheque to: C.E. Powers amount $1.60 [Filed under LP Biographical: Box #4.012, Folder #2]
• Handwritten note from E. Bright Wilson, Jr. to LP, RE: Tells LP that he is sorry he isn't feeling well and that the stuff he sent him fit in fine. Discusses the people he visited while at Princeton. Asks LP if he agrees that they should include writing about Slater's paper and bond angles in their book. Tells LP that he has settled the difficulties he was having with Chapter X, that he will write about angular momentum in Chapter XV, and that is willing to try anything else LP would like him to do. Discusses the work of his colleagues. Talks about the Society of Fellows dinners. [Handwritten note from LP to Bright, 1 1, 191934] [Filed under LP Personal Safe: Drawer 3, Folder 3.005.57]
• LP writes cheque to: Bell and Cooley amount $5 [Filed under LP Biographical: Box #4.012, Folder #2]
• Lecture Notes: The Structure of Crystals-Lecture 2, Lattices and their Properties [LP Bio: Academia Box 1.010, Folder 8]
• Letter from James B. Conant, Harvard University to LP RE: Conant believes LP should read the information backing up the formulas he wishes to change more carefully as he feels there is sufficient evidence for them. He does not have student to recommend to LP at this time. [Letter from LP to Conant September 25, 1934] [Filed under C: Individual Correspondence, Box #66.15]

• Handwritten note from LP to E. Bright Wilson, Jr., RE: Encloses Chapter IX and says that XI is almost ready with resonance included in Section 41. Suggests that they put susceptibilities in Chapter XIII. Asks if Bright has written anything on matrices. [Filed under LP Personal Safe: Drawer 3, Folder 3.005.57]
• Lecture Notes: The Structure of Crystals-Lecture 3, Diffraction of Waves [Filed under LP Biographical: Academia Box 1.010, Folder 8]
• Note from LP to Charles W. Stillwell. [Stillwell's letter: September 25, 1934] Filed under: S: Correspondence, Box #377.4]

  Oct. 2, 1934

  Dr. Stillwell:

  In your letter you suggest using radius for oxygen in between bivalent oxygen and atomic oxygen. However, I don't know what the radius of "atomic oxygen" is. I would say that it has a covalent radius (0.66 Å) giving distance to an atom to which it is bonded, and a van der Waals radius, giving distance to non-bonded atoms. No systematic study of this has been made; the v.d. Waals radius is probably about 1.5 Å, but quite variable.

  It is only by using the ionic viewpoint that the radius ratio can be made useful. I used my "univalent radii" in the antimonic acid paper because these radii represent the relative sizes of ions and so should be used in simple packing considerations. The crystal radii do not represent relative sizes of ions of different charge, but contain correction factors for valence. I think you have overlooked the definition of my univalent radii -- see pp. 770 and 773 of my 1927 paper. The univalent radius for O⁼ is not the ionic radius of O^-, and the N-O distance in NO₃ ^- should not be the sum of the univalent radii, but rather this sum with a large correction factor, equal to √√10 - 2/n-1 with n=6 (Eq. 13).* This gives 2.01 x .631 = 1.27 Å. Another value is the sum of the crystal radii, 1.51 Å with about a -15% correction because of coordination number 3 (instead of 6); this gives 1.28 Å, with an uncertainty of about 0.05 Å or more because of the uncertain correction. A more reliable distance can be predicted from the covalent viewpoint. The double-bond distance is 1.22 Å (p 224), and recent studies which we have made indicate that a correction of + 0.05 Å should be made for resonance between one double & two single bonds, giving 1.27 Å. This should be reliable to within 0.01 Å.

  I hope this clears up your difficulty. The only thing not discussed in detail is the use of √z₁z₂ in place of z in Eq. 13. This was used for fluorite (√2) at the bottom of the next page.

  Very truly yours,

  Linus Pauling

  * The 10 is the product of valences 2 and 5 of O⁼ and N⁵⁺.

• Letter from Warren Weaver, Director of the Natural Sciences, The Rockefeller Foundation to LP RE: Weaver is interested in LP' s progress in his researches with electron diffraction methods. He does not plan to be in the Far West during the fall, but his associate, Mr. Hanson, will visit Pasadena before Christmas and it would be advisable for LP to suspend his grant re-application until after his visit. [LP's letter to Weaver September 25, 1934] [LP Science Box 14.037, Folder 5]

• AHP writes cheque to: F. N. Chamberlain amount $10.35 [Filed under LP Biographical: Box #4.012, Folder #2]

• Handwritten note from E. Bright Wilson, Jr. to LP, RE: Encloses chapter 10 and says that he will try to think of more problems and prepare the diagram for the chapter. Tells LP that he will try his new helium X as soon as he can and that his substitute for chapter 13 seems clear. [Filed under LP Personal Safe: Drawer 3, Folder 3.005.51]
• Letter from Pauline Pauling to LP and AHP RE: Pauline writes to tell LP and AHP she and Tommy have bought a house, are now married and are expecting a baby. She asks if she can borrow some money from them to cover the unexpected expenses. [Filed under LP Biographical: Box #5.051, Folder #51.1]
• Manuscript Notes: "Li2+" [LP Science Box 3.004, Folder 1]

• Lecture Notes: The Structure of Crystals-Lecture 4, Reciprocal Lattice cont'd. [LP Biographical: Academia Box 1.010, Folder 8]
• Manuscript: Simplified Treatment of Atoms and Molecules [LP Science Box 3.004, Folder 2]

• Lecture Notes: The Structure of Crystals-Lecture 5, Bragg, oscillation and rotation methods [LP Biographical: Academia Box 1.010, Folder 8]

• AHP writes cheque to: Aram Pashigan amount $50 [Filed under LP Biographical: Box #4.012, Folder #2]
• AHP writes cheque to: William D. Crane amount $85 [Filed under LP Biographical: Box #4.012, Folder #2]

• AHP writes cheque to: City of Pasadena amount $12.54 [Filed under LP Biographical: Box #4.012, Folder #2]
• AHP writes cheque to: Consumer's Research Inc., amount $3 [Filed under LP Biographical: Box #4.012, Folder #2]
• AHP writes cheque to: F. N. Chamberlain amount $2 [Filed under LP Biographical: Box #4.012, Folder #2]
• AHP writes cheque to: Goodes Seed and Feed amount $4.30 [Filed under LP Biographical: Box #4.012, Folder #2]
• AHP writes cheque to: Gould and Attlesey amount $8 [Filed under LP Biographical: Box #4.012, Folder #2]
• AHP writes cheque to: Los Angeles Gas and Electric Corp., amount $3.41 [Filed under LP Biographical: Box #4.012, Folder #2]
• AHP writes cheque to: Model Grocery Co., amount $4.59 [Filed under LP Biographical: Box #4.012, Folder #2]
• AHP writes cheque to: Munger and Munger amount $1.50 [Filed under LP Biographical: Box #4.012, Folder #2]
• AHP writes cheque to: Pasadena Star-News amount $1.30 [Filed under LP Biographical: Box #4.012, Folder #2]
• AHP writes cheque to: Southern California Telephone Co., amount $3.99 [Filed under LP Biographical: Box #4.012, Folder #2]
• AHP writes cheque to: Standard Oil Co. Of California amount $7.06 [Filed under LP Biographical: Box #4.012, Folder #2]
• AHP writes cheque to: T. W. Mather Co., amount $50.66 [Filed under LP Biographical: Box #4.012, Folder #2]
• AHP writes cheque to: The Athenaeum amount $8.96 [Filed under LP Biographical: Box #4.012, Folder #2]

• AHP writes cheque to: Adohr Milk Farms amount $17.53 [Filed under LP Biographical: Box #4.012, Folder #2]
• AHP writes cheque to: C.E. Powers amount $3.20 [Filed under LP Biographical: Box #4.012, Folder #2]
• Handwritten note from E. Bright Wilson, Jr. to LP, RE: Discusses the problem in the integral of the He function. Explains the ideas he has about a chapter on general theory. Tells LP about some of the work he's doing at Harvard, the lectures he is attending, and the possibility of using their book to teach a course. Says that he will try to write something about susceptibilities. Shows LP how the integral he mentioned earlier behaves as its limit approaches zero. [Filed under LP Personal Safe: Drawer 3, Folder 3.005.56]
• Letter from Charles W. Stillwell to LP RE: thanking LP for the reprint and the discussion of univalent radii, but still has a few more questions to be answered. [LP's letter: October 2, 1934, LP's reply: October 16, 1934] [Filed under: S: Correspondence, Box #377.4]

• Lecture Notes: The Structure of Crystals-Lecture 6, Bragg, oscillation and rotation methods cont'd. [LP Biographical: Academia Box 1.010, Folder 8]
• Letter from LP to Arthur B. Lamb, Editor, Journal of the American Chemical Society. [Lamb's letter to LP September 25, 1934; Lamb's reply to LP October 26, 1934] [LP Science Box 14.002, Folder 2]

  October 15, 1934

  Prof. Arthur B. Lamb,

  Laboratory of Chemistry,

  Harvard College,

  Cambridge, Mass.

  Dear Professor Lamb:

  I have carefully examined the manuscript "Properties of Electrolytic Solutions," by Fuoss, and the accompanying material, and I recommend that it be not accepted for publication.

  I concur completely with Dr. Scatchard, and could hardly express my opinion regarding the manuscript better than by quoting his remarks. I feel that the mathematical treatment is not sufficiently reliable nor sufficiently closely related to the chemical problem under discussion to represent any advance over the simpler treatments already published by the author. If published, the paper would have to be read by those people interested in the field, each of whom would thus be forced to devote several hours to this profitless endeavor. It is for this reason that I believe that complicated mathematical treatments of chemical problems should be published only when they represent a real contribution.

  To be more specific in criticism, I may point out that the treatment of this manuscript is based on the earlier treatment of ion-pairs, which is in error (as Dr. Scatchard has pointed out) in that the distribution function does not agree with its definition, and that it is assumed that neighboring ions do not affect the probability of a configuration. I agree with Dr. Scatchard that the discussion regarding the size of solvent molecules is far from convincing.

  I have found it necessary to keep this difficult manuscript for two weeks in order to work through it carefully; as a rule I return manuscripts within two or three days.

  Yours truly,

  Linus Pauling

  LP:M

  Enclosure

• AHP writes cheque to: A&P amount $5 [Filed under LP Biographical: Box #4.012, Folder #2]
• Lecture Notes: The Structure of Crystals-Lecture 7, Bragg, oscillation and rotation methods cont'd. [LP Biographical: Academia Box 1.010, Folder 8]
• Note from LP to Dr. Stillwell RE: LP does not recommend using ionic radii in discussing covalent compounds. [Stillwell's letter: October 12, 1934] [Filed under: S: Correspondence, Box #377.4]

• Letter from J. McKeen Cattell to LP RE: Thanks LP for the review of the book by Davey. Apologizes that it is so unfavorable. Is sending a proof of his review [Article proof October 22, 1934] to LP and asks that if there are any good points in the book to add a paragraph about them. Originally asked Dr. Wyckoff to review the book, but he would not because his views were unfavorable. LP notes relating to book review on top of page. [Letter from LP to Cattell 1 6, 1934] [Filed under LP Personal Safe: Drawer 3, Folder 3.018.43]

• AHP writes cheque to: C.E. Powers amount $3.20 [Filed under LP Biographical: Box #4.012, Folder #2]
• AHP writes cheque to: Ruthanna Pollard amount $30 [Filed under LP Biographical: Box #4.012, Folder #2]

• AHP writes cheque to: A&P amount $6.63 [Filed under LP Biographical: Box #4.012, Folder #2]

• Article Proof RE: Proof of LP's text review of Wheeler P. Davey's book, "A Study of Crystal Structure and its Application." Enclosed in letter from Cattell to LP 10-17-34. [Filed under LP Personal Safe: Drawer 3, Folder 3.018.52]
• LP Research Notebooks, RNB 09 RE: Electron diffraction data - Tetramethylmethane

• Handwritten note from E. Bright Wilson, Jr. to LP, RE: Discusses the contributions on perturbation theory and matrix mechanics. Tells LP that he is working on Slater for Chapter XIII and asks if LP could sent him an outline for XIV sections heads. Asks LP what he thinks of Rossin and Kistakowski's work and mentions Andrew's work. Asks if Stilt has gotten anywhere on his normal coordinate treatment of Si2F6. Notes that he has done some of the appendices and asks if LP has received everything. Asks if anything has happened to Hoard. [Filed under LP Personal Safe: Drawer 3, Folder 3.005.61]

• AHP writes cheque to: Aram Pashigan amount $25 [Filed under LP Biographical: Box #4.012, Folder #2]

• AHP writes cheque to: A&P amount $10 [Filed under LP Biographical: Box #4.012, Folder #2]
• Letter from Arthur B. Lamb, Editor, Journal of the American Chemical Society to LP RE: Requests that LP review the rebuttal from R. M. Fuoss concerning the manuscript that LP felt should not be published. Lamb will be glad to accept any surrebuttal. [LP Science Box 14.002, Folder 2]

• AHP writes cheque to: C.E. Powers amount $3.20 [Filed under LP Biographical: Box #4.012, Folder #2]

• AHP writes cheque to: Pay'n...? amount $5 [Filed under LP Biographical: Box #4.012, Folder #2]

• Handwritten note from LP to E. Bright Wilson, Jr., RE: Says that he has finished polishing up chapter 10 and advises Bright only to write a section on Slater's molecule treatment and simple applications, rather than a chapter, to be added to chapter 12. Outlines the miscellaneous chapter 13. Encloses section 48 of chapter 13. Briefly discusses other work he is doing. [Filed under LP Personal Safe: Drawer 3, Folder 3.005.55]
• LP writes cheque to: Wm. D. Crane amount $85 [Filed under LP Biographical: Box #4.012, Folder #2]