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• AHP writes cheque to: Susie Perry [Boormans Market] amount: $32.50 [Filed under LP Biographical: Box #4.022, Folder #1]
• Itinerary for LP and AHP for April and May 1953. [Filed under LP Speeches: (Speeches by Linus Pauling, 1953), Box 1953s, Folder 1953s.4] [Also Filed under LP Speeches: (Speeches by Linus Pauling, 1953), Box 1953s, Folder 1953s.5]
• LP writes cheque to: Bennett Travel Agency amount: $348.07 [Filed under LP Biographical: Box #4.022, Folder #1]
• List of Participants for the Ninth Council of Chemistry Solvay [In French] [Filed under LP Speeches: (Speeches by Linus Pauling, 1953), Box 1953s, Folder 1953s.4]
• Pauling Scrapbook: Chemical and Engineering News article about LP RE: reports that LP has traveled to Europe and the east coast of the U.S. for a five week trip, in which he will visit protein research groups and will attend the 9th triennial Solvay Congress. He will also deliver the Treat B. Johnson Lectures in chem. at Yale and will receive an award from the Newspaper Guild of New York. [Filed under: LP Biographical, Box 6.006, Folder 6.32]
• Publication, “The configuration of Polypeptide Chains in Proteins.” [A report for the Ninth Solvay Congress, University of Brussels, April 6-14, 1953.] in Les Proteins. Rapports et Discussions, R. Stoops, ed. Brussels: Coudenberg, 1953, 63-99. [Filed under LP Reprints: (Publications of Linus Pauling, 1953), Box 1953p, Folder 1953p.3]
• Publication, “Two Pleated-Sheet Configurations of Poly-Peptide Chains Involving Both Cis and Trans Amide Groups.” Proc. Natl. Acad. Sci. 39 (April 1953): 247-252. [Linus Pauling and Robert B. Corey] [Filed under LP Reprints: (Publications of Linus Pauling, 1953), Box 1953p, Folder 1953p.10]
• Publication, “Two Rippled-Sheet Configurations of Polypeptide Chains, and a Note About the Pleated Sheets.” Proc. Natl. Acad. Sci. 39 (April 1953): 253-256. [Linus Pauling and Robert B. Corey] [Filed under LP Reprints: (Publications of Linus Pauling, 1953), Box 1953p, Folder 1953p.11]

• Article from the New York Times titled "Dr. Astin Defends Work of Bureau." [Filed under LP Science: Box 14.023, Folder 23.5]
• LP flies from Los Angeles to New York.
• Letter from J. H. Sturdivant [of the Caltech Chem Dept.] to Mr. C. T. Geiser of the U.S. Dept. of Agriculture RE: in response to Mr. Geiser's letter, Mr. Sturdivant informs him that the Caltech equipment that he referred to actually belongs to the Department of Agriculture. [Filed under U: Correspondence 1953] [Letter from Mr. Geiser of the US Dept. of Agriculture to the Chemistry Division of Caltech March 18, 1953].
• Letter from LP to Dr. Daniel Mazia. [Letter from Dr. Mazia to LP March 11, 1953] [Filed under M: Correspondence 1953, Box #256, Folder #4]

  1 April 1953

  Dr. Daniel Mazia

  Department of Zoology

  University of California

  Berkeley 4, California

  Dear Dr. Mazia:

  I am glad to have your letter of 11 March, and to know about your work on surface films of deoxyribonucleic acid.

  I am afraid that I do not have much to say about your first question - as to how to account for the stability of DNA film over a solution in which the substance is soluble.

  I agree with you that your measurement of 22 A for the thickness of the film agrees nicely with our results. The diameter of our helix is about 18 A. If these molecules were to be packed together in a surface film, there is a chance that the contact distance would be somewhat less with a corresponding increase in the thickness of the film, accordingly your value of 22 is, I think, compatible with our structure.

  As to your third question, I do not have a strong feeling about the matter. I have not thought enough about this matter as yet, to have formed a sound opinion.

  It seems to me that the work that you and Mr. James have done adds one more piece of evidence to support our structure, to the extent that it makes the thickness of the molecule roughly 20 A.

  I hope that you will continue to carry on work in this field. Professor Corey and I do not feel at all sure that our structure is the correct one, but we do feel that it will be possible, in the course of a few years, to determine the fundamental folding of polynucleotide chains in the nucleic acids.

  Sincerely yours,

  Linus Pauling:W

• Letter from LP to Dr. Ernest H. Lyons, Jr. RE: writes that he looks forward to receiving reprints of his detailed paper and also looks forward to seeing how he made use of LP's ideas about electronic structure of metals. It is good that he is continuing his work in connection with his teaching duties at Principia College. [Letter from Dr. Lyons, Jr. to LP February 18, 1953] [Filed under L: Correspondence 1953, Box #230, Folder #19]
• Letter from LP to Dr. Henry Lemaire [2 copies in the file] RE: writes in reply to Dr. Lemaire's letter that they will let him know if any openings that might interest him come to their attention. [Note in pen at bottom: "Neither Prof. Lucas or I are willing to consider Lemaire for an appointment, CN"] [Letter from Dr. Henry Lemaire to LP March 5, 1953] [Filed under L: Correspondence 1953, Box #230, Folder #19]
• Letter from LP to Dr. Netter, Kiel Universitat, Kiel, Germany, RE: Would be pleased to accept the invitations to the University of Kiel on his upcoming trip to Germany to participate in the protein symposium. [In reply to March 9, 1953 letter from Netter to LP]. [Filed under LP Peace: Box 4.001, Folder 1.3]
• Letter from LP to Dr. Z. M. Konasiewicz RE: in response to his enquiry, LP writes that Caltech does not have any work on fuel under way, however, there is such work in the field of petroleum technology being carried on at the University of Southern California. [Letter from Dr. Konasiewicz to LP February 16, 1953] [Filed under K: Correspondence 1953, Box #200, Folder #18]
• Letter from LP to H.H. Weber, Physiologisches Institut, RE: Final preparations are being made for LP's trip to Germany, and is looking forward to seeing Weber. Details plans to visit other Universities in Germany. [Filed under LP Peace: Box 4.001, Folder 1.3]
• Letter from LP to Mr. Claude A. Villee of the Dept. of Biochem. At Harvard Med. School, RE: thanks him for his note about the transposition of the two figures in his paper on nucleic acid. Will send a reprint later. [Filed under LP Correspondence: Box #427, Folder #13]
• Letter from LP to Peter Pauling [Filed under LP Biographical: Box #5.041, Folder #41.6]

  1 April 1953

  Dear Peter:

  Here is your check for 1 May 1953. I am sending it now because I shall not be back in Pasadena until 6 May.

  I am looking forward to seeing you and to talking with you about the structure of nucleic acids and other questions.

  Love from

  [Linus Pauling]

• Letter from LP to Professor K. Freudenberg, University of Heidelberg, RE: Would be glad to give a lecture at the University of Heidelberg on his upcoming trip to Germany, assuming it fits into his schedule. [Filed under LP Peace: Box 4.001, Folder 1.3]
• Letter from LP to W.N. Lacey RE: requests that a budget adjustment be made to allow for four full tuition scholarships for fifth year graduate students in Chemical Engineering on behalf of B.H. Sage. [Related letter form B.H. Sage to LP March 16, 1953]. [Filed under: LP Biographical, Box 1.018, Folder 18.2]
• Letter from the Page One Ball to LP RE: they are concerned with the potential travel expenses of LP's trip coast-to-coast to personally receive his award in science. Request that he let them know his travel intentions so they can plan for them. Also requests a photo of LP for their "Page One" book. [Letter of response from BW to Mr. Arthur Rosenstrock April 3, 1953].
• Memo from LP to Horace Gilbert RE: encloses his completed application and fee for membership in Town Hall. [brochure about Town Hall included with the letter] [Letter from Dr. Gilbert to LP March 17, 1953] [Filed under LP Correspondence: Box #410, Folder #18].

• AHP writes cheque to: Manor Market amount: $25.00 [Filed under LP Biographical: Box #4.022, Folder #1]
• Itinerary: arrive in New York at 10:30 AM; Stanley Schaefer at The Players; meeting with Theodore McClintock; leave New York at 5:00 PM [Filed under LP Travel: Box #1.001, Folder 1.11]
• LP flies from New York to London.
• Letter from LP [signed in his absence by BW] to Dr. Ronald Mason RE: writes that they would be glad to have him at Caltech if he wins the Exchange Fellowship in Cancer Research. [Note from Dr. Mason to LP March 28, 1953, note of response from Dr. Mason to LP May 12, 1953] [Filed under M: Correspondence 1953, Box #256, Folder #4]
• Letter from LP [signed in his absence by BW] to Mr. E. S. Proskauer RE: thanks him for the money for his review of the Rutger's book. Is willing that they quote his remarks on the quality of the text. [Letter from Mr. Proskauer to LP March 30, 1953] [Filed under LP Correspondence: Box #313, Folder #1].
• Letter from LP to Mr. Bartz RE: it is not worthwhile to release unpublished reports to certain industrial associates- which was requested by Bartz - and that release of information before publication should be very limited. [Reply to undated letter from Bartz to LP, filed under April 2, 1953]. [Filed under: LP Biographical, Box 1.028, Folder 28.3]
• Letter from LP to W. Nowacki RE: writes that he has turned Prof. Nowacki's letter about M cards over to Professor Shomaker. Thanks him for sending a copy of his book on Fourier synthesis. [Letter from LP to Prof. Nowacki March 9, 1953] [Filed under LP Correspondence: Box #277, Folder #15: file (Nowacki, Werner)].
• Pauling Scrapbook: Pasadena Star-News article entitled "Newspaper Guild to Honor Pauling" RE: reports that LP will receive a "Page One" award from the New York Newspaper Guild. [Filed under: LP Biographical, Box 6.006, Folder 6.32]
• Undated letter from R.V. Bartz to LP RE: recommends that LP prepare samples of reports on research being done for 3 particular industrial associates accounts. [Letter from LP to Mr. Bartz April 2, 1953]. [Filed under: LP Biographical, Box 1.028, Folder 28.3]

• Itinerary: arrive in London at 9:45 AM [Filed under LP Travel: Box #1.001, Folder 1.11]
• Letter from BW to Mr. Arthur Rosenstock RE: encloses a photo. Says that LP and AHP are planning to attend the "Page One Ball" and suggests she forward them any letters Mr. Rosenstock wishes to send, as LP is currently on travels. [Letter from Mr. Arthur Rosenstock to LP April 1, 1953, related letter from Jacob L. Holtzmann April 9, 1953].
• Letter from Henry Wise of the Jet Propulsion Lab of Caltech to LP RE: writes with the interest of obtaining a teaching appointment with the Dept. of Chem. Engineering. [Letter of response from LP to Dr. Wise May 25, 1953] [Filed under LP Correspondence: Box #444, File #1].
• Letter from L.A. DuBridge to Dr. Otto Haas, Rohm and Haas Company bcc:LP RE: Explains the nature of the Industrial Associates program and would like to arrange a meeting with Haas and perhaps Dr. Connor to discuss Rohm and Haas Company participation in the program. [Filed under: LP Biographical, Box 1.028, Folder 28.3]
• Letter from LP to H.G. Turley, RE: LP is sending a photograph and a biographical sketch as per Turley’s request. LP provides an outline of his estimated expenses for his travel to Cincinnati. [Turley’s letter March 23, 1953] [Filed under LP Speeches: (Speeches by Linus Pauling, 1953), Box 1953s, Folder 1953s.8]
• Letter from LP to Mr. Neilly of John Wiley & Sons, Inc., RE: thanks him for the copy of the book Non-Aqueous Solvents by Audrieth and Kleinberg. Comments on the book. [Filed under W: Correspondence 1953] [Letter from Mr. Neilly to LP January 27, 1953] [Filed under LP Correspondence: Box #444, File #1].
• Letter from LP to Mr. T. Imanishi RE: writes that he was interested to read Mr. Imanishi's last note, however, he is soon leaving on a trip to Europe, and therefore will not be able to think about Mr. Imanishi's questions at this time. It seems that the questions are too complicated for LP anyway, and so LP suggests that he will not be of much help to Mr. Imanishi. [Note from T. Imanishi to LP March 24, 1953, note from Mr. Imanishi to LP May 17, 1953] [Filed under I: Correspondence 1953, Box #185, Folder #14]
• Letter from W. M. Stanley to LP RE: writes that without proof he does not believe that Dr. O'Gorman's contract was not renewed due to any bias involving the "oath controversy." Feels that it was just the natural result of his Department's realization that no argument could be made for his retention. [Letter from LP to Prof. Stanley March 30, 1953, related note from Dr. John Michael O'Gorman to LP February 8, 1953] [Filed under O: Correspondence 1953, Box #300, Folder #15]
• Postcard from LP to Ava Helen Pauling RE: Writes that his plane is approaching the English coast. He mentions that he spent the previous evening with "Stan" and another man going over the printer's marks for the new edition of General Chemistry. [Filed under LP Safe: Box #1.021, Folder #21.2]

  Friday morning 3, April, 1953

  Dear girl:

  We are just approaching the English coast. The flight has been fine. We stopped in Goose Bay for an hour last night.

  Yesterday I spent the day (11:30 to 3:30) with Stan and the man putting in the printers' markds, McClintoch- no time for anything else.

  We are about 2 hours late.

  The same steward is on our BOAC clipper as last summer.

  Love from Daddy

• Letter from LP to Ava Helen Pauling RE: Pauling writes from Cambridge. Mentions the trip to England and a luncheon with Bragg, Perutz, Crick, and others. Goes on to mention various people who send their greetings to AHP.
• Letter from R.W. Asmussen to LP RE: Confirms that LP will attend the symposium in Denmark to discuss complex-chemistry. Asks him to forward a copy of his lecture. [In reply to letter from LP to Asmussen March 26, 1953, reply from LP to Asmussen June 19, 1953]. Filed under LP Speeches: 1953s.13].
• Pauling Scrapbook: (Pasadena) Star News article entitled "Give Students H-Bomb Facts, Teachers Told" RE: Reports LP's statement given at a convention of teachers at the Biltmore Hotel about educating children about the H-Bomb. [Filed under: LP Biographical, Box 6.006, Folder 6.32]

• AHP writes cheque to: Athenaeum amount: $21.52 [Filed under LP Biographical: Box #4.022, Folder #1]
• Memo from B. H. Sage to A. H. Walter, cc LP RE: Sends a purchase order for work entitled "The Volumetric Behavior of Some Aircraft Fuels." [Filed under: LP Biographical, Box 1.021, Folder 21.3]

• AHP writes cheque to: Adohr Milk Farm amount: $13.41 [Filed under LP Biographical: Box #4.022, Folder #1]
• AHP writes cheque to: Dr. H. A. Whipple amount: $6.00 [Filed under LP Biographical: Box #4.022, Folder #1]
• AHP writes cheque to: F.C. Nash & Co. amount: $8.21 [Filed under LP Biographical: Box #4.022, Folder #1]
• AHP writes cheque to: Pasadena Pool Maintenance amount: $25.00 [Filed under LP Biographical: Box #4.022, Folder #1]
• AHP writes cheque to: Pasadena Star News amount: $1.75 [Filed under LP Biographical: Box #4.022, Folder #1]
• Brief article from Chemical and Engineering News regarding the Astin case. [Filed under LP Science: Box 14.023, Folder 23.3]
• LP flies from London to Brussels, stays at the Fondation Universitaire, ll rue d'Egmont.
• Letter from Garff B. Wilson to LP RE: writes on President Sproul's behalf in thanks for LP's letter of March 30, 1953, and to apologize for the mistake in their Inauguration program for the American Philosophical Society. [Filed under LP Correspondence: Box #444, File #1]
• Letter from Henry Allen Moe, Guggenheim Memorial Foundation, to LP RE: Asks LP to give his opinion regarding a new application form, and H.F. Blum's application. [Related letter from Wulf to Moe April 8, 1953]. [Filed under LP Science: Box 14.015, Folder 15.1].
• Letter from Henry Allen Moe, Guggenheim Memorial Foundation, to LP RE: Asks LP to give his opinion regarding a request for grant extension and grant increase by two fellows of the foundation.
• Letter from LP to Ava Helen Pauling RE: Writes that he is safely in Brussels, and that he and Peter had lunch with Adair and Synge. He writes briefly about Peter, and then relays a story of how the bus he was in after getting off the plane had a close encounter with a large airplane. He mentions that after only five days he is quite lonesome. Significantly, he states that he saw the King's College nucleic acid pictures, and after talking with Watson and Crick, he feels that his structure is probably wrong and that theirs is correct. [Filed under LP Safe: Box #1.021, Folder #21.3]

  BRUXELLES, LE [printed] 6 April 1953 [LP's Handwritting]

  11, RUE D'EGMONT

  Dearest little love:

  I've just arrived, safely, in Brussels, and am in my room. No one else seems to be here. Synge and Adair were in the London bus terminal, and Peter and I had coffee with them in the buffet, about noon. They came on the plane with me (S + A) but are in a hotel, rather than this club. I shall go for a walk now, and have dinner, and go to bed. The town seems to be very quit- it is Easter Monday, a bank holiday in England.

  I saw Dorothy and Thomas- they passed through Cambridge on the way to visit D's mother.

  Peter is in fine shape- his face no yet clear, but perhaps a bir better. He is cutting a wisdom

  [page 2]

  tooth. He flies tomorrow to Paris. He liked the stuffed dates and cookies. I overlooked his vest. Anyway, he has a bright red one, with brass buttons - they are popular with the boys.

  We had lunch with the Braggs, + their two daughters. The talk was much about Crellin. The Braggs are looking forward to their trip to California.

  I dined with Bragg + Roughton last night in Trinity College. I didn't see the Todds, nor the Rothchilds + Tylers- they were in Rushbrooke.

  The flight from London was nice, but a bit cloudy + a bit rough. Our bus

  [page 3]

  from the airport met a 4-engined plane coming toward us on the ground. Our driver turned the bus around, shot back up the road ahead of the plane (which took up the whole road) and then off to one side. This is an unusual hazard.

  I haven't yet learned what our schedule is for the week, not who will be here (some I know about). I am already pretty lonesome, after five days.

  I have seen the King's College nucleic acid pictures, and talked with Watson and Crick, and I think that our structure is probably wrong, and theirs right.

  Much love from

  Daddy

• Letter from R.V. Bartz to Dr. Percy L. Julian, Glidden Company RE: Details the purpose of the Industrial Assoiciates program and highlights LP's point that participation does not direct research in any way. [Letter from LP to Bartz March 30, 1953]. [Filed under: LP Biographical, Box 1.028, Folder 28.3]
• Pauling Scrapbook: Chemical and Engineering News [two] articles entitled "Protein Structures Delineated" and "Protein Denaturation Still Not Fully Understood" RE: discusses LP's lecture with the Divisions of Biological and Polymer Chemistry on the structure of proteins. Second article discusses the progress of the discovery of what protein denaturation is. Quotes LP. [Filed under: LP Biographical, Box 6.006, Folder 6.32]

• AHP writes cheque to: Arthur Heimann and Sons amount: $22.93 [Filed under LP Biographical: Box #4.022, Folder #1]
• AHP writes cheque to: Colby Nurseries amount: $1.90 [Filed under LP Biographical: Box #4.022, Folder #1]
• AHP writes cheque to: Fashion Cleaners amount: $5.25 [Filed under LP Biographical: Box #4.022, Folder #1]
• AHP writes cheque to: Liebergs amount: $26.70 [Filed under LP Biographical: Box #4.022, Folder #1]
• AHP writes cheque to: Manor Market amount: $50.00 [Filed under LP Biographical: Box #4.022, Folder #1]
• AHP writes cheque to: Mira Loma Mutual Water Company amount: $9.72 [Filed under LP Biographical: Box #4.022, Folder #1]
• AHP writes cheque to: Pacific Tel & Tel amount: $17.84 [Filed under LP Biographical: Box #4.022, Folder #1]
• AHP writes cheque to: Richfield Oil Co. amount: $15.29 [Filed under LP Biographical: Box #4.022, Folder #1]
• AHP writes cheque to: Southern Counties Gas Co. amount: $19.83 [Filed under LP Biographical: Box #4.022, Folder #1]
• AHP writes cheque to: Standard Oil Co. amount: $8.64 [Filed under LP Biographical: Box #4.022, Folder #1]
• AHP writes cheque to: T.W. Mather Inc. amount: $15.92 [Filed under LP Biographical: Box #4.022, Folder #1]
• Letter from A. F. Holtorff of Kraft Foods Company, to LP RE: in order for Kraft to create processed cheeses, they use emulsifying salts. However, they are not entirely clear in understanding the problem of the elucidation of the mechanism of cheese emulsification. Ask if LP might talk with them about protein structures in the hopes that this will help them learn exactly how the salts are working. [Note in the right margin in blue ink: "Diphosphate? Linking H bonds?"] [Filed under H: Correspondence 1953, Box #166, Folder #4]
• Letter from Gerald Osborn of School Science and Mathematics Journal to LP RE: lets LP know that his article arrived and is being sent to the publishers at once. [Filed under LP Correspondence: Box #379, Folder #1]
• Letter from LP to Ava Helen Pauling RE: Writes that the congress has not begun, and he has not seen anyone as of yet. Writes about his evening of seeing a movie and going to dinner at a restaurant and getting lost on his way back to the hotel. LP draws a diagram of his trip. He mentions that the Russians are reportedly making an effort to be more cooperative. He then mention that after having thought more about the Watson-Crick DNA model, he thinks that it is probably right. [Filed under LP Safe: Box #1.021, Folder #21.4]

  BRUXELLES, LE [printed] 7 April 1953 [LP's Handwriting]

  11, RUE D'EGMONT

  Dearest love:

  Our congress has not yet started, and I have not yet seen anyone (except Synge and Adair, Yesterday). We begin tomorrow, at 9:30.

  Today I woke at 10:30. I was tired, not having slept very well on the plane or in Cambridge. The bed here is good. I had my continental breakfast in my room, and read until 1, in a French detective story (translated from the English). Then from 1 to 4:30 I walked around the center of town- Hotel de ville (very nice), Kings

  [page 2]

  town house, Mameken pr's [?], etc. Then I rested in my room until 6, sow a movie (made in France), had dinner, and come home.

  I hade gone to the movie (m) and restaurant (R)

  [Here he put a diagram showing his journey]

  by a simple way. When I came out I thought I would save a block (dotted line). Instead I got lost, and walked about a mile, coming out far beyond + below my place. I estimated my return route as shown by the /\/\/\/\/\/\/ line. Of course, the blocks aren't square and the streets aren't straight.

  [page 3]

  I think the movies help me to understand French. The words spoken in French are given ( in some what shortened version) in written Flemish at the bottom of the screen, and I can read it easily.

  I have a nice room, with a nice bathroom, much hot water, a bidet by the toilet, etc. This place is a club for university professors, etc. Very few people here - I have seen one or two in the foyer.

  The papers say that the Russians have turned over a new leaf, are very reasonable, and they hope that the Americans will be , too.

  I have thought more about the nucleic acid structure of Crick + Watson, + I think that it is probably right.

  Much love from

  Paddy

  P.S. Last night, 8:30 to 9, as I was coming home from my supper + movie, I sow the fireworks celebration for Princess Josephine - Charlotte, who gets married tomorrow. Very fine - like Lurich [?]. She came out on her balcony + waved to her thousands of shouting countrymen. The palace is only one block from the club.

• AHP writes cheque to: Broadway Pasadena amount: $14.96 [Filed under LP Biographical: Box #4.022, Folder #1]
• LP attends the Ninth Triennial Conference, Institut International de Chimie Solvay, Brussels, Belgium. [Filed under LP Speeches: 1953s.4]
• Letter from Beatrice Wulf, secretary to LP, to Henry Allen Moe, Guggenheim Memorial Foundation, RE: Informs Moe that LP is in Brussels attending the Ninth Solvay Congress until April 15, 1953. Asks if he would like her to forward the letter he has sent. [In reply to Letter from Moe to LP, April 6, 1953, reply from Moe to Wulf April 10, 1953]. [Filed under LP Science: Box 14.015, Folder 15.1].
• Letter from Dr. Fankuchen to LP RE: requests that LP send the American Association of Scientific Workers the manuscript for his chapter of the projected book on the peaceful uses of science. [previous letter from Dr. Fankuchen to LP December 30, 1952, following telegram from Dr. Fankuchen to LP April 29, 1953] [Filed under LP Correspondence: Box #117, Folder #4].
• Letter from L.A. DuBridge to Mr. Leland I. Doan, Dow Chemical Company bcc: LP RE: Describes Caltech's Industrial Associates program and asks if Dow would be interested in participating since they are participating in a similar program with M.I.T. [Filed under: LP Biographical, Box 1.028, Folder 28.3]
• Letter from LP to AHP RE: LP reports that a few speakers that were planned to present at the conference he is attending did not show. LP, planning to present his lecture the following day, presented his sickle cell anemia information early. He also relates the story of a French movie he viewed. [Filed under LP Safe: Box #1.021, Folder #21.5]

  BRUXELLES, LE 8 April 1953 [Date handwritten]

  11, RUE D'EGMONT

  Dearest love:

  Today was my working day. From the schedule I expected to speak tomorrow — Edwin Cohn and Kai Pedersen were to appear today. But Cohn did not come, nor did he write his report, nor inform them of his defection until two weeks ago; so he was not on today's program — a Belgian has been working hard to fill this gap, and will report later. Pedersen (who sends you his regards, and looks forward to seeing you in Stockholm, as does also Tiseluis [?] (Mrs. T. is not here; she has the flu)) spoke, and the discussion

  [page 2]

  of his paper lasted until mid-afternoon (we had a good lunch; our meetings are in the Cité Estudiantine, of the Université Libre, founded as a private university, & now supported by the government). Havinga took part in the discussion, & said that I should tell about sickle-cell anemia, which I did briefly, just before lunch.

  Then at mid-afternoon I gave my report. It was well received, but discussion is postponed until tomorrow morning, when Bragg begins it. Lady Bragg is here too. We then had tea, & met the Rector, who spent two months teaching philosophy in Claremont College, four years ago.

  Bragg said that the Solvay

  [page 3]

  Congress for Physics next year will be on the subject of metals.

  After tea we rode the tram (Karrer & I — Mrs. Karrer had been present at the lunch, but not the tea; she sends her regards to you) back to the Club. I hunted around for a movie, and went to one by Rene Clair, "Les Belles de Nint." It is very clever and amusing — about a young pianist & composer who lives over a garage & teaches elementary school & gives piano lessons. He is driven nearly wild by the noises of the revved-up cars, the air hammer digging up the streets, the hack saw, etc; he can't sleep, and when he does sleep he has dreams about himself as a leading composer & hero in former times — 1900, 1830, Foreign Legion, with the Three Musketeers, leading the Revolution against the nobles — also being a noble (or musician with them) & taken to the guilletine [sic], in the stone age in a Jeep, etc. He rescues girls right & left. Finally all ends well; his composition is performed at the Paris Opera.

  Much love from

  Paddy.

• Letter from Prof. William Lipscomb to LP RE: thanks LP for his recent correspondence relating to the appointment of a new staff member into their division. They decided on Dr. Rufus Lumry. [Letter from LP to Prof. William N. Lipscomb January 14, 1953] [Filed under LP Correspondence: Box #217, Folder #6 (Lipscomb, William N.)].
• Letter from Tomoji Tanaka to LP RE: sends LP his third report and manuscript about physical chemistry and why the Bolrzman, Fermi and Bose theories don't equate. Asks LP to comment on it. [Letter from LP to Tomoji Tanaka March 19, 1953, follow-up letter and manuscript from Mr. Tanaka to LP April 30, 1953, letter of response from LP to Mr. Tanaka May 11, 1953] [Filed under LP Correspondence: Box #410, Folder #18].

• LP attends the Ninth Triennial Conference, Institut International de Chimie Solvay, Brussels, Belgium. [Filed under LP Speeches: 1953s.4]
• Letter from Jacob L. Holtzmann of the U. of the State of New York RE: finds that LP is also to receive an award of the Newspaper Guild in New York on April 17, 1953. Invites LP and AHP as their guests at dinner at the Hotel Astor before the presentation of the awards. [Note in pencil at bottom: "Acceptance given to Mr. Holtzmann's secy. via phone 4/16. B Salaman. Telephone: Hanover 2-7 740"] [related letter from Arthur Rosenstock to LP April 1, 1953 (filed under P: 1953)].
• Letter from LP’s Secretary to Henry Woodburn, RE: LP needs to know if a hotel reservation has been made for him and AHP during their stay in Buffalo. The Paulings expect to be in New York from April 29th through May 6th. [LP’s reply May 7, 1953] [Filed under LP Speeches: (Speeches by Linus Pauling, 1953), Box 1953s, Folder 1953s.6]
• Letter from M.S. Sundaram, Embassy of India, to LP RE: Invitation for LP to attend the 41st Session of the Indian Science Congress, scheduled for the first week of January 1954. In addition, the Embassy is hopeful that LP will stay an additional 4 to 6 weeks and visit various Indian Universities. [Reply from LP to Sundaram May 13, 1953].
• Letter from W. J. Wiswesser to LP RE: requests visiting with LP during April as he is now interested in the problem of developing linear descriptions for all kinds of molecular structures. Goes on to describe his interests and work. Sends a copy of the first outline of a manual T. Y. Crowell hopes to publish that year. [Letter of response from BW to Dr. Wiswesser April 13, 1953] [Filed under LP Correspondence: Box #444, File #1].
• Pauling Scrapbook: California Tech (Caltech, Pasadena) article entitled "Pauling now on long trip" RE: reports LP's plans for his five-week trip to Europe and the Eastern U.S. [Filed under: LP Biographical, Box 6.006, Folder 6.32]

• LP Newspaper Clipping: 1953n. New York World-Telegram and Sun article "Enzyme Club Leads to Super-insecticides". April 10, 1953 [Filed under LP Newspaper Clippings: 1953n2.4]
• LP attends the Ninth Triennial Conference, Institut International de Chimie Solvay, Brussels, Belgium. [Filed under LP Speeches: 1953s.4]
• Letter from Brahama Datta Sharma to LP RE: a student of chemistry now working in the National Chemistry Laboratory with Dr. Biswas who is working on protein structures and requests reprints of some of LP's papers. [Note in pencil at left of letter: "all protein reprints sent 4/30/53."] [Letter of reply from LP to Mr. Sharma May 7, 1953] [Filed under LP Correspondence: Box #379, Folder #1].
• Letter from Dr. Netter to LP RE: [Written in German]. [Related letter from Netter to LP May 6, 1953]. [Filed under LP Peace: Box 4.001, Folder 1.3]
• Letter from Frederick L. Stone, Chief, Extramural Programs, National Institute of Neurological Diseases and Blindness to Dr. Lee Dubridge RE: discussion of the Commission on Higher Education and LP's support of public health research. [Letter from DuBridge to Stone March 14, 1953] [Filed under: LP Biographical, Box 1.030, Folder 30.4]
• Letter from Henry Allen Moe, Guggenheim Memorial Foundation, to LP RE: Requests that letter sent to LP on April 6, 1953 be sent back to him, and he will get in touch with LP in New Haven. [Reply to letter from Wulf to Moe April 8, 1953]. [Filed under LP Science: Box 14.015, Folder 15.1].
• Letter from LP to Ava Helen Pauling RE: Writes that yesterday was interesting, with a talk by Bragg and a discussion of LP's own work. He mentions spending some time thinking about collagen structure, and a biochemical meeting going on tomorrow. He also says that there are very few wives attending the conference. [Filed under LP Safe: Box #1.021, Folder #21.6]

  BRUSSEL, 10 April 1953 [Date handwritten]

  11, EGMONSTRAAT

  Dearest love:

  Yesterday was also an interesting day, with a talk by Bragg + discussion of my work in the morning, and reports by Chibnall and others in the afternoon. This morning Theorell is to speak.

  I went to a movie last night, but it wasn't very good. I came home, thought about collagen a while, and then went

  [page 2]

  to bed. I have slept better the last two nights.

  Tomorrow we attend the Biochemical meeting, and I go to tea at the Timmermans. On Sunday we make a tour of Bruges. We continue our work on Monday, + on Tuesday I start home. I shall come to La Guardia as soon as I can, and look for you at the Eastern Airlines place. My BOAC plane may be late, of course.

  [page 3:]

  Not many wives have come to this congress — about 2 in addition to Lady Bragg.

  I suggested that the Braggs come to Pasadena a week early in order that we might take them to Yosemite. They plan to do so.

  I must pop off now to the meeting.

  Love from

  Paddy

• Note from Mr. Denny Vaughan to LP RE: request suggestions about how he might go about fusing a white powder with flavor together without losing the intensity of the flavor. [Letter of response from BW to Mr. Vaughan April 30, 1953] [Filed under LP Correspondence: Box #427, Folder #13].
• Pauling Scrapbook: New York World- Telegram and Sun article entitled "Enzyme Clue Leads to Super-Insecticides." RE: a new alternative super-insecticide is being developed based on research at the U. of California citrus experiment station. LP's knowledge of the way enzymes in insects control their growth made the chemical building of the insecticides possible. [Filed under: LP Biographical, Box 6.006, Folder 6.32]

• AHP writes cheque to: Collector of Internal Revenue amount: $13.00 [Filed under LP Biographical: Box #4.022, Folder #1]
• AHP writes cheque to: Walter Fritts amount: $43.77 [Filed under LP Biographical: Box #4.022, Folder #1]
• LP attends the Ninth Triennial Conference, Institut International de Chimie Solvay, Brussels, Belgium. [Filed under LP Speeches: 1953s.4]

• LP attends the Ninth Triennial Conference, Institut International de Chimie Solvay, Brussels, Belgium. [Filed under LP Speeches: 1953s.4]

• AHP writes cheque to: Claude Bloch amount: $12.00 [Filed under LP Biographical: Box #4.022, Folder #1]
• AHP writes cheque to: Georg Jensen, Inc. amount: $82.50 [Filed under LP Biographical: Box #4.022, Folder #1]
• AHP writes cheque to: Pierre Dalinet Coiffures amount: $23.75 [Filed under LP Biographical: Box #4.022, Folder #1]
• AHP writes cheque to: Quinton Schooley amount: $75.00 [Filed under LP Biographical: Box #4.022, Folder #1]
• AHP writes cheque to: Trade World Corporation amount: $64.25 [Filed under LP Biographical: Box #4.022, Folder #1]
• Article from Chemical and Engineering News "Dismissal of NBS Head Stirs Scientists; Investigation Asked" discusses the Astin case. [Filed under LP Science: Box 14.023, Folder 23.3]
• LP attends the Ninth Triennial Conference, Institut International de Chimie Solvay, Brussels, Belgium. [Filed under LP Speeches: 1953s.4]
• Letter from BW to Dr. W. J. Wiswesser RE: writes that his letter has been received, but LP is in Brussels at the Solvay Congress at this time, and will not be in Pasadena when he visits later this month. [Letter from Dr. Wiswesser to LP April 9, 1953] [Filed under LP Correspondence: Box #444, File #1].
• Letter from Dr. Fred O’Flaherty, RE: O’Flahery is enclosing a check for LP for $300.00 to cover his expenses to Cincinnati. [Filed under LP Speeches: (Speeches by Linus Pauling, 1953), Box 1953s, Folder 1953s.8]
• Letter from Hans H. Weber, Physiologisches Institut, to LP RE: [Written in German]. [Reply from LP to H.H. Weber May 12, 1953]. [Filed under LP Peace: Box 4.001, Folder 1.3]
• Letter from LP to Dave Shoemaker of MIT RE: encloses Prof. Shoemaker's manuscript "A Systematic Method for Calculating Volumes of Truncated Brillouin Polyhedra." Asks whether Prof. Shoemaker wants prepublication circulation of his manuscript. [Letter from LP to Prof. Shoemaker February 19, 1953, letter from Prof. Shoemaker to LP June 1, 1953] [Filed under LP Correspondence: Box #363, Folder #3: File (Shoemaker, David & Clara 1942-1995)].
• Letter from LP to Dorothy E. Snavely, Unitarian Service Committee, RE: States that he has applied for a passport extension to allow for the Germany trip, and encloses various correspondence he's had with Weber. Also states that AHP would be interested in assisting the Unitarian Service Committee in any way necessary. [In reply to April 15, 1953 letter from Snavely to LP]. [Filed under LP Peace: Box 4.001, Folder 1.3]
• Letter from Peter Pauling to LP and AHP RE: Discusses Linda's travels to Spain and a few mutual acquaintances. [Filed under LP Biographical: Box 5.041, Folder 41.7].

  13 April 1953

  Dear Parents,

  I am sorry not to write sooner. I have been gone a few days to Paris where it is warm & the trees are in bloom and I could not write or work.

  Thank you Daddy for your letter & the cheques. I shall give Linda the one.

  They are still away, presumably in Spain. I still think this trip is good, though Linda knows anyway what she is doing. I really cannot say anymore until they return, I suppose at the beginning of next week.

  I must work very hard. I met a friend of yours Maria named Steven, a physicist. He folkdanced with you.

  I am still searching a little for a place to live next year.

  A big package has come from Elfriede. It's addressed to Linda. I am glad the book is going so well. I received a letter from the girl I escorted to the Ball at Luciafest in Stockholm and she uses it and seems to pass her exams by reading it.

  I received a letter from Linus and am glad he is still kicking. I was beginning to worry.

  I shall write when Linda returns.

  Much love,

  Peter

• Letter from Prof. F. J. Toole to LP RE: writes that he sent LP a present of maple syrup. Asks whether LP's revision of his General Chemistry will be ready for fall term. Wiesner is synthesizing the phenanthridine sample. [Letter from LP to Prof. F. J. Toole November 26, 1952, letter from LP to Prof. Toole May 21, 1953] [Filed under LP Correspondence: Box #407, Folder #8].
• Letter from Robert B. Corey to Miss Stella Albert [cc: LP] RE: writes concerning the Parke, Davis Abstracts she sent in accordance with LP's letter to her of June 7, 1950. Appreciates her abstracts, however, feels that the content does not apply enough for them to be on her mailing list. [Filed under LP Correspondence: Box #313, Folder #1]
• Letter from W. H. Eberhardt to LP RE: is considering taking a sabbatical from Georgia Tech for three months and would like to use that time to pursue a problem that he is studying. Was wondering if it were possible for him to spend that time at Caltech so as to utilize some assistance from LP and his colleagues. [Letter of response from LP to Prof. Eberhardt May 22, 1953].
• Memo from Caltech Dean of Faculty to President L. A. DuBridge cc: LP RE: Recommended salary increases for ten faculty members of Chemistry division. [Filed under: LP Biographical, Box 1.030, Folder 30.8]
• Pauling Scrapbook: photo from the International Institute of Chemistry at Solvay, of the council, including LP. [Filed under: LP Biographical, Box 6.006, Folder 6.33]

• AHP travels from Los Angeles to London, meeting LP.
• AHP writes cheque to: Aletha Courtney amount: $89.95 [Filed under LP Biographical: Box #4.022, Folder #1]
• AHP writes cheque to: Byron Hopper amount: $25.00 [Filed under LP Biographical: Box #4.022, Folder #1]
• AHP writes cheque to: I. Magnin & Co. amount: $13.51 [Filed under LP Biographical: Box #4.022, Folder #1]
• AHP writes cheque to: I. Magnin & Co. amount: $67.48 [Filed under LP Biographical: Box #4.022, Folder #1]
• AHP writes cheque to: Manor Market amount: $100.00 [Filed under LP Biographical: Box #4.022, Folder #1]
• AHP writes cheque to: Susie Perry [Boormans Market] amount: $45.00 [Filed under LP Biographical: Box #4.022, Folder #1]
• Article from the New York Times, "24 Senators Urged Product Rejected by Astin, Aide Says," discusses Astin case. [Filed under LP Science: Box 14.023, Folder 23.5]
• LP attends the Ninth Triennial Conference, Institut International de Chimie Solvay, Brussels, Belgium. [Filed under LP Speeches: 1953s.4]
• LP flies from Brussels to London, and then from London to New York.
• Letter from Francis Crick to LP. [Filed under LP Science: Box 9.001, Folder 1.38]

  UNIVERSITY OF CAMBRIDGE DEPARTMENT OP PHYSICS

  CAVENDISH LABORATORY

  Free School Lane, Cambridge.

  14th April 1953

  Professor Linus Pauling,

  Gates & Crellin laboratory,

  Pasadena 4, California,

  U.S.A.

  Dear Professor Pauling,

  I hope you were not puzzled because we said very little about coiled-coils when you were here, but your letter to Perutz about them only reached us on the day after you left.

  My recollection of our conversation in the summer is very similar to yours, except that, as I recall it, it was slightly longer than you have remembered it. In particular I touched on knobs-into-holes packing and the possibility of a 7-strand cable. You pointed out to me that this might explain the 27 Å equatorial reflection.

  It was natural, therefore, that when Peter told us you were working on coiled-coils that the idea should get round that I had suggested the idea to you. When your Nature article was eventually published it was clear to me that there were very little grounds, if any, for such a belief. In particular you had suggested a definite model, whereas I had not, and, more important, you had put forward a different reason for the coiling.

  In my view the idea that the α-helix might be inclined is an obvious one, and it is only a small, step from that to the idea of coiling. I attach much more importance to the reasons underlying the coiling, and the proof that a coiled-coil gives both 5.1 and 1.5 Å reflections on the meridian. On these points we have followed independent paths.

  On reflection I think it might have made things easier if you had let me know you were writing a paper on the idea, so that I would have had the opportunity of putting forward my ideas simultaneously However, as things turned out, thanks to the many channels of communic-ation between Caltech. and the Cavendish, this is effectively what happened.

  We very much enjoyed your visit here. Watson and I would be most interested to learn what you feel about our D.N.A. structure when you have had time to digest the idea and the experimental data.

  [handwritten] Yours sincerely, Francis Crick

• Letter from H.B. Hass of the Sugar Research Foundation, Inc., to LP RE: Asks LP for his opinion of a book Familial Nonreagenic Food Allergy by Dr. Arthur F. Coca that he is to review. Is of the opinion that it is poorly written and translated, but asks LP for a second opinion. [Note in LP's hand in lower left: "Old, afraid to go out of house." [Letter of response from LP to Dr. Hass May 21, 1953] [Filed under H: Correspondence 1953, Box #166, Folder #4]
• Letter from Henry Allen Moe, Guggenheim Memorial Foundation, to LP RE: After reconsidering, asks that his previous letters to LP not be forwarded back. [Related letter from Moe to Wulf April 10, 1953]. [Filed under LP Science: Box 14.015, Folder 15.1].
• Letter from L.A. DuBridge to Dr. Frederick L. Stone cc: LP RE: Thank you note for positive comments regarding the Commission on Higher Education report. [Letter in response to Frederick to DuBridge] [Filed under: LP Biographical, Box 1.030, Folder 30.4]
• Letter from Mrs. M. A. Kellar, Secretary to Dr. W. H. Taylor, to LP RE: acknowledges LP's letter, and writes that Dr. Taylor is in Spain. [Letter from LP to Dr. W. H. Taylor March 30, 1953, letter from W. H. Taylor to LP May 5, 1953] [Filed under LP Correspondence: Box #405, Folder #8, file: (Taylor, W. H.)].
• Letter from Sister Marie Augustine to LP RE: enquires about some research that LP mentioned he and Dr. Niemann had underway on the topic of inhibition of enzyme activity, in their article "Molecular Architecture and Biological Reactions." Requests references to where she might find further literature on the topic. [Letter of response from LP to Sister Marie Augustine May 21, 1953] [Filed under M: Correspondence 1953, Box #256, Folder #4]
• Letter from Theodore T. Puck, Ph.D. to LP RE: requests that LP stop over in Denver on his way home from the National Academy meeting in order to give a seminar before their faculty group of the U. of Colorado. [Letter of response from LP to Prof. Puck April 20, 1953] [Filed under LP Correspondence: Box #313, Folder #1].

• A copy of The Congressional Record, Proceedings and Debates of the 83rd Congress, First Session dealing with the Astin case. [Filed under LP Science: Box 14.023, Folder 23.4]
• Article from the New York Times titled "The Astin Case." [Filed under LP Science: Box 14.023, Folder 23.5]
• Itinerary: AHP arrives in New York at 7:45 AM; LP and AHP travel together to New Haven; c/o Professor and Mrs. Herbert Harned, Yale University [Filed under LP Travel: Box #1.001, Folder 1.11]
• Letter from Dorothy Snavely, Unitarian Service Committee, to LP RE: Asks LP to send her copies of any correspondence between Weber and himself so that they are informed about LP's trip to Germany to participate in the protein symposium. [Reply from LP to Snavely May 12, 1953]. [Filed under LP Peace: Box 4.001, Folder 1.3]
• Letter from L. A. DuBridge to the Division Chairmen, including LP RE: Budget for 1952-53 fiscal year passed, but requests further fiscal responsibility. [Filed under: LP Biographical, Box 1.030, Folder 30.4]

• Letter from LP to Henry Allen Moe, Guggenheim Foundation, RE: The extension requested by Dr. Hedberg with regards to his fellowship is justified. Furthermore, Donahue's request for a grant increase is also acceptable. Also favors the granting of a fellowship to Blum. [in reply to April 6, 1953 letter from Moe to LP]. [Filed under LP science: Box 14.015, Folder 15.1].
• Letter from W. P. Woodring to LP RE: was also glad to see LP at the Academy tea, though was sorry that they didn't get to talk. [Letter from LP to Dr. Woodring March 13, 1953] [Filed under LP Correspondence: Box #444, File #1].

• AHP writes cheque to: Lord & Taylor amount: $71.35 [Filed under LP Biographical: Box #4.022, Folder #1]
• Article from the New York Times, "Weeks Keeps Astin Until Evaluation of Agency is Ended," discusses the Allen V. Astin case. [Filed under LP Science: Box 14.023, Folder 23.5]
• LP and AHP attend the Page One Ball and Award of the New York Newspaper Guild, Hotel Astor, New York.
• LP and AHP check into the Hotel Astor in New York. [Receipt, checkout April 18, 1953].
• Letter from Dr. Wyman to LP RE: writes to LP about the details of their plans for him to visit France. Discusses how to go about getting funding for LP's visit. Also mentions a recent visit with LP's son. [Letter from LP to Dr. Wyman January 6, 1953, follow-up letter from Dr. Wyman to LP May 11, 1953].
• Speech by LP on The Structure of Proteins and Nucleic Acids, [series of three lectures] Treat B. Johnson Visiting Lectureship, Yale University, New Haven, Connecticut. [Filed under LP Speeches: 1953s.5]

• LP and AHP check out of the Hotel Astor. [Receipt, check-in April 17, 1953].
• Letter from Dr. J. Miller to LP RE: writes as a follow-up to his last letter of October 17, 1952 by describing his plans for the year of 1954 and by describing his special interests in the mechanisms of organic reactions. Requests information about whether Caltech has any funds available for his plans. [Letter from LP to Dr. Miller October 24, 1952, letter of response from LP to Dr. Miller June 22, 1953].

• Letter from LP to R.W. Asmussen RE: Pauling speech before the Denmark symposium on complex-chemicals will be titled "The Electroneutrality Principle in Relation to the Structure of Complexes". Also mentions that both PP and AHP will be joining him. [In reply to May 4, 1953 letter from Asmussen to LP]. [Filed under LP Speeches: 1953s.13].

• Fourteen pages torn out of Chemical and Engineering News regarding the Astin case. [Filed under LP Science: Box 14.023, Folder 23.3]
• Letter from BW to Miss Thelma Johnson Street RE: writes that LP has asked her to send her a biographical sketch of himself, which is enclosed. [Filed under LP Correspondence: Box #379, Folder #1]
• Letter from BW to Mr. Minoru Tsutsui RE: in response to his letter of request, BW sends him sample copies of examination questions in organic chemistry. [Letter from Mr. Tsutsui to LP March 25, 1953] [Filed under LP Correspondence: Box #410, Folder #18].
• Letter from Hymin Shapiro of the Ethyl Corporation to LP RE: sends a gram of the compound bis-cyclopentadienyl iron as LP mentioned that Dr. Shomaker might be interested in making an electron diffraction check of it. If LP would like a liquid derivative of this compound, let him know. [letter of response from LP to Dr. Hymin Shapiro June 22, 1953] [Filed under LP Correspondence: Box #313, Folder #1].
• Letter from LP to Max Delbruck. [Filed under LP Science: Box #9.001, Folder #1.39]

  20 April 1953

  Professor Max Delbruck

  California Institute of Technology

  Pasadena, California

  Dear Max:

  I received your letter, to Harry Weaver, this morning, and immediately telephoned him.

  He had not seen your letter yet, but after I told him what you had said, and what my opinion was, he said that he would bring Watson over for the Virus Symposium.

  He suggested that they might save money by having Watson stay here through the summer, instead of returning to England. I pointed out that the work that Watson is doing in collaboration with Crick is very important, and that it might well be important enough to justify sending him back to Cambridge, even for the period of two months. I judge that he agreed to do that, if necessary.

  I was very deeply impressed by the Watson-Crick structure, I do not know whether you know what put Corey and me off on the wrong track. The x-ray photographs that we had, which had been made by Dr. Rich, and which are essentially identical with those obtained some years ago by Astbury and Bell, are really the superposition of two patterns, due to two different modifications of sodium thymonucloates. This had been discovered a year or more ago by the King's College people, but they had not announced it, and I did not know that this was so. Corey and I had tried to find the structure that accounted for one of the principal features of one pattern, and simultaneously for one of the principal features of the second pattern, Watson and Crick saw the x-ray photographs made in King's College a couple of months ago, when they attended a seminar there, and they immediately began work on the problem. The King's College people had already derived one conclusion from the photographs, as to the nature of the helical structure. Watson and Crick amplified this by the idea of complementariness between purine and pyrimidine residues, and formulated

  Professor Max Delbruck 20 April 1953

  their structure. While there is still a chance that their stricture is wrong, I think that it is highly probable that it is right. It has very important implications, as you mention. It think that it is the most significant step forward that has been taken for a long time.

  Cordially yours,

  Linus Pauling

  LP:bfs

  cc: Professor Robert B. Corey

• Letter from LP to Prof. Theodore T. Puck RE: in response to his letter of request LP writes that he is unable to stop over in Denver to present a seminar on his way home to Pasadena from the Academy meeting because he will also be giving some lectures in Buffalo. [Letter from Prof. Puck to LP April 14, 1953].
• Letter from LP’s Secretary to The Congress Bureau of the XIIIth International Congress of Pure and Applied Science, RE: LP’s secretary is enclosing copies of the application form for accommodations for LP and AHP relating to the Congress. Also, Peter Pauling will need a reservation in the same boarding house as LP and AHP as he will be attending the Congress as well. [Reply from the Congress May 4, 1953] [Filed under LP Speeches: (Speeches by Linus Pauling, 1953), Box 1953s, Folder 1953s.12]
• Letter from Prof. Dr. J. Kuhnau of Medizinische Fakultat der Universitat Hamburg, to LP RE: [Letter written in German] [Filed under K: Correspondence 1953, Box #200, Folder #18]
• Note from Harlan Trumbull to LP RE: writes that the reprints of LP's papers on proteins that he said he was sending must have been miscarried and therefore requests another set be sent to his Ohio address. Mentions a meeting with Jimmie Bell. [Filed under LP Correspondence: Box #410, Folder #18]
• Speech by LP on The Structure of Proteins and Nucleic Acids, [series of three lectures] Treat B. Johnson Visiting Lectureship, Yale University, New Haven, Connecticut. [Filed under LP Speeches: 1953s.5]

• Letter from L. A. DuBridge to Dr. Ralph Connor, Rohm and Haas Company bcc: LP RE: States that he is happy to be meeting with Dr. Haas on May 4, 1953 regarding the Industrial Associates program. [Filed under: LP Biographical, Box 1.028, Folder 28.3]
• Speech by LP on The Structure of Proteins and Nucleic Acids, [series of three lectures] Treat B. Johnson Visiting Lectureship, Yale University, New Haven, Connecticut. [Filed under LP Speeches: 1953s.5]

• LP and AHP leave New Haven and fly to Philadelphia. [Handwritten note says "Meet Shaeffer 2:00 PM Benj. Franklin"].
• Letter from Robert Morris, Conference of Inquiry, to LP RE: Form letter requesting that people encourage others to join in the conference to discuss the Rosenberg trial and its implications. [Filed under LP Peace: Box 4.001, Folder 1.1]
• Package received from Ethyl Corporation by LP RE: Packing list shows 1 gram quantity of bis-cyclopentadienyl delivered. [Filed under: LP Biographical, Box 1.020, Folder 20.5]

• LP writes cheque to: Benjamin Franklin Hotel amount: $100.00 [Filed under LP Biographical: Box #4.022, Folder #1]
• Letter from Mr. Ben May to LP RE: Notices LP's work on insecticides with Drs. Blinn, Gunther, Carman and Metcalf. Mentions a drug, S.K.F. 525 A, that he might consider in relation to the insecticides. [Letter from Mr. Ben May to LP September 17, 1952, letter from LP to Mr. May June 22, 1953] [Filed under LP Correspondence: Box #244, Folder #5 (May, Ben)].

• Letter from I.C.M. Maxwell, Assistant Secretary, Inter-University Council for Higher Education in the Colonies, to LP RE: request for a statement regarding R. Spitzer's qualifications for an academic post. Included is information about the University of the West Indies including salary and background information. [Reply from LP to I.C.M. maxwell July 1, 1953].
• Note from Mr. P. K. Kapur of the U of Minn. School of Chem. to the Chairman of the Dept of Chem., Caltech, RE: writes with the intent of applying to Caltech for a post doctoral research fellowship in the Dept of Chemistry at Caltech. Goes on to list all of his educational, work and research experience. [Letter of response from LP to Mr. Kapur May 7, 1953] [Filed under K: Correspondence 1953, Box #200, Folder #18]

• AHP writes cheque to: Walter Fritts amount: $48.00 [Filed under LP Biographical: Box #4.022, Folder #1]
• Letter from Stephen H. Fritchman, First Unitarian Church, to LP RE: Invitation to LP to participate in a conference regarding the Rosenberg trial as a scientific advisor. [Filed under LP Peace: Box 4.001, Folder 1.1]

• LP and AHP leave Philadelphia and fly to Washington D.C.

• Article from Chemical and Engineering News "Weeks Keeps Astin as NBS Head Until New Tests Are Complete." Discusses the Astin case. [Filed under LP Science: Box 14.023, Folder 23.3]
• Letter from Garnet T. Page of The Chemical Institute of Canada to LP RE: Requests that LP address their Institute's Sections in Western Canada during the 1953-54 season. [Letter of response from LP to Mr. Page May 22, 1953] [Filed under LP Correspondence: Box #313, Folder #1].
• Pauling Scrapbook: Chemical and Engineering News article about LP RE: reports that LP has traveled to Europe to attend the 9th triennial Solvay Congress in Belgium and to visit protein research groups in London and Cambridge. [Filed under: LP Biographical, Box 6.006, Folder 6.32]

• Memorandum from G. Housner to Caltech faculty members RE: Announcement of a faculty meeting on May 13, 1953 at which Academic Freedom and Tenure will be discussed. [Filed under: LP Biographical, Box 1.029, Folder 29.6]
• Statement to Peter Pauling from Caltech RE: Lists a balance of $48.95 with a description of "Chemistry supplies and breakage." [Filed under: LP Biographical, Box 1.020, Folder 20.5]

• LP and AHP check into the Hotel Statler, Buffalo, New York. [Receipt, checkout May 6, 1953].
• LP and AHP meet with Professor Hunry M. Woodburn, University of Buffalo.
• Letter from Crellin Pauling to LP and AHP.

  April 29th, 1953

  Wednesday Evening

  Dear Parents,

  Please accept my humblest apologies for not writing you before this. The application for the drivers license came the Monday after Mamma left. I was glad to get it. A new windshield for the Fordie will cost about $12 for the glass and $3 to install it. I went down and got insurance. I didn't get fire and theft. Mr. Dawson didn't think it was worth it on an old car. I greatly enjoy the feeling of driving without the fear of getting a ticket for no lisence. [sic]

  I will make arrangements to meet you at the airport next week.

  The Fleming House party was a great success. We cooked fifty pounds of spare ribs. We had a hell of a time finding room to cook them, but we managed. Jack said that he would cook spare rips [sic] for our picnic at the time of the workshop.

  Everything is under control here. At the present time I have $2.69. Hope I can make out. I didn't go to the road race because I couldn't find anybody who wanted to go. McCormack and Tucker went, but the TC only holds two people. Damn good race, tho. Phil Hill won in a Ferrari 2.9.

  Sue hasn't come to work this week. I called her up this afternoon and she says her heart hurts. Says it feels like it will stop beating. Says Doctor X told her to keep quiet and not bend over. Hm.

  Well, I must do some home-work and write to my siblings.

  Love

  Crellie

  CP/jh

  P.S. I got a cold -- but it is almost over now. I couldn't go swimming at the party.

  [Filed under LP Biographical: Box 5.048, Folder 48.4].
• Letter from R.V. Bartz to Dr. Harry M. Weaver, National Foundation for Infantile Paralysis cc: Linus Pauling RE: Invitation to attend the conference on protein structure. Includes program of conference. [Filed under: LP Biographical, Box 1.028, Folder 28.3]
• Letter from R.V. Bartz to Lederle Laboratories, Inc. cc: LP RE: Invitation to attend the conference on protein structure. Includes program of the conference. [Filed under: LP Biographical, Box 1.028, Folder 28.3]
• Letter from R.V. Bartz to National Institute of Health cc: LP RE: Invitation to attend the conference on protein structure. Includes program of the conference. [Filed under: LP Biographical, Box 1.028, Folder 28.3]
• Letter from R.V. Bartz to Office of Naval Research cc: LP RE: Invitation to attend the conference on protein structure. Includes program of the conference. [Filed under: LP Biographical, Box 1.028, Folder 28.3]
• Letter from Ralph Connor, Rohm and Haas Company to LP RE: apologizes for not being able to attend May conference on protein structure. Hopes to meet with LP in the future. [Filed under: LP Biographical, Box 1.028, Folder 28.3]
• Memo from R.V. Bartz to LP RE: Includes attached list of ninety-three companies; Bartz hopes they can add 25 to 30 to the Industrial Associates program. [Filed under: LP Biographical, Box 1.028, Folder 28.3]
• Telegram from Dr. Fankuchen to LP RE: enquires about when LP will be ready with his manuscript for the projected AASW book about peaceful uses of science, as the publishers are ready to proceed. [previous letter from Dr. Fankuchen to LP April 8, 1953, following telegram from Beatrice Wulf to Dr. Fankuchen April 30, 1953] [Filed under LP Correspondence: Box #117, Folder #4].

• Letter from BW to Mr. Denny Vaughan RE: answers Mr. Vaughan's letter by informing him that no one in their department can help him with his particular question. Suggests he get in touch with a commercial research chemist. [Note from Mr. Vaughan to LP April 10, 1953] [Filed under LP Correspondence: Box #427, Folder #13].
• Letter from Tomoji Tanaka to LP RE: sends LP his fifth report and manuscript about the r-ray and the isomeride. Asks LP for an answer to his letters. [Letter from LP to Tomoji Tanaka March 19, 1953, previous letters from Mr. Tanaka to LP March 20, 1953, April 8, 1953, letter of response from LP to Mr. Tanaka May 11, 1953] [Filed under LP Correspondence: Box #410, Folder #18].
• Pauling Scrapbook: Buffalo Courier Express article entitled "Page One Ball Honors Famous in Many Fields" RE: reports the events of the Page One Ball and who attended. Additional blurb mentions LP's lecture scheduled for U. of Buffalo on the topic of "The Chemical Bond and the Structure of Inorganic Complexes." [Filed under: LP Biographical, Box 6.006, Folder 6.32]
• Pauling Scrapbook: U. of Buffalo Lecture Series Program entitled "A Course of Lectures by Dr. Linus C. Pauling" RE: lectures given in the series of Foster Lectures 1952-53. Lists the lecture dates and titles, April 30, May 1, 4, 5, about chemical bonds, valence of metals, intermetallic compounds, structure of proteins, and the structure of antibodies. [Filed under: LP Biographical, Box 6.006, Folder 6.32]
• Speech by LP on The Chemical Bond and the Structure of Inorganic Complexes, Foster Lecture Series, University of Buffalo. [Filed under LP Speeches: 1953]
• Telegram from Beatrice Wulf to Dr. Fankuchen RE: writes that LP is away and will be back May 7, 1953. [previous telegram from Dr. Fankuchen to LP April 29, 1953, following letter from Dr. Fankuchen to LP May 26, 1953] [Filed under LP Correspondence: Box #117, Folder #4].