1893-1900, U. Freiburg/Breisgau and U. Berlin: 1897, U. Berlin, Dr. phil. with M. Planck; 1897-1900, U. Berlin, Asst. to Planck.
1900-09, U. Göttingen, Priv.-Doz.; except 1905, U. Cambridge and U. Illinois.
1909-15, Techn. Hochsch. Milan, Prof.
1917-19, Milit. Serv.
1920-21, Techn. Hochsch. Stuttgart, o Prof.
1921-22, Techn. Hochsch. Aachen, Prof.

BOHR: 7 Dec 20 (BSC 1,1).
SOMMERFELD: 21 May 98, 7 Jan 99, 6 Feb 99, 27 Apr 99, 30 Apr 99, 4 Nov 99, 31 Jan 00, 8 Mar 00, 28 May 00, 7 Oct 00, 23 Feb 01, 18 Jun 01, 19 Oct 01, 9 Dec 02, 14 Oct 04, 12 Nov 06, 28 Jan 08, (29,3).

See: Sommerfeld.

Boston, Mass., U.S.A.
1899, Beloit Coll., B.S.
1901, Harvard U., M.S.
1901-03, Tyndall Fel.: U. Berlin, U. Göttingen, U. Cambridge.
1904, Harvard U., Ph.D.
1903-43, Princeton U.: 1903-06, Instr.; 1906-09, Asst. Prof.; 1909-43, Prof.

BOHR: 6 Mar 20,28 Apr 20, 8 Jul 20, (BSC 1,1).

See: BOHR.

BOHR COLLECTION, Copenhagen, Denmark. Letters to Bohr, 29 Jan 23, 27 Sep 31.
PALMER PHYSICAL LABORATORY, Princeton University, Princeton, N.J. Letters and memorabilia held in the Departmental office.

1893-1900, U. Cambridge: 1897, M.A.; 1897-1900, 1851 Exhibition Scholar with J. J. Thomson. 1900-05, Supervisor, Lord Blythwood's Lab., Renfrew.
1905-19, U. London, Lect.: 1909, D.Sci.
1919-44, U. Edinburgh: 1919-23, Lect. then Reader; 1923-44, Prof.

GOUDSMIT: 15 Oct 27, 25 Nov 27, (61,7).

See: GOUDSMIT.

BOHR COLLECTION, Copenhagen, Denmark. Letter to Bohr, 25 Oct 23.

c. 1923-29, U. Rome.
1929-30, U. Leipzig with P. Debye.
1930-to date, U. Rome: 1934-37, Asst.; 1937-to date, Prof.

One session, 34 pp. transcript.

KRAMERS: 2 letters 1951 (I1,1).

BOHR COLLECTION, Copenhagen, Denmark. 3 Letters to Bohr, 1941-42. See: Bohr.

1905-10, U. London.
1910-11, U. Heidelberg: 1911, Dr. phil. with P. Lenard
1911-12, Cambridge U., 1851 Exhibition Scholar.
1912-13, U. London, 1851 Exhibition Scholar.
1913-14, U. Manchester, John Harling Fel., with E. Rutherford.
1914-19, Milit. Serv.
1920-28, Artillery Coll., Woolwich, Prof.
1928-50, U. London, Prof.

One session, 7 pp. transcript.

BOHR: 14 Feb 19, 22 Mar 19, 12 Jul 19, [Mar 22], (BSC 1,1).
GERLACH: 29 Nov 24 (1g,1).

See: BOHR.

BOHR COLLECTION, Copenhagen, Denmark. 2 Letters to Bohr, 22 Nov 23, 21 Jul 28, 15 letters 1948-1957.
BEDFORD COLLEGE, LIBRARY, University of London, London, England. Letter to W. Wilson, 7 Dec 50.

1926-30, U. Michigan: 1926, B.S.; 1930, Ph.D. with S. A. Goudsmit.
1930-31, Calif. Inst. Techn., Nat. Res. Fel.
1931-32, Mass. Inst. Techn., Nat. Res. Fel.
1932-33, U. Michigan, Alfred Lloyd Fel.
1934-35, Columbia U., Instr.
1935-40, Cornell U.: 1935-37, Instr.; 1937-40, Asst. Prof.

GOUDSMIT: 25 Feb 29, (63,1); 26 Mar 29, (63,2) 4 Apr 29, 30 Apr 29, (63,3); 22 May 29, (63,4); 1 Jun 29, (63,5).
KRAMERS: 2 letters 1948-49 (11,2).

BOHR COLLECTION, Copenhagen, Denmark. Letter to Bohr, 21 Nov 57. See: BOHR.

1902-06, U. Strassburg, U. Berlin, U. Munich.
1906-14, U. Tübingen: 1906-08, Referendar; 1913, Dr. rer. nat. with F. Paschen; 1913-14, Asst. 1914-18, Milit. Serv.
1918-20, Veifa Co., Frankfurt-am-Main, Physicist. 1920-26, U. Tübingen: 1920-23, Asst.; 1923-26, Priv.-Doz.
1926-36, Agric. Inst., Hohenheim: 1926-29, a. o. Prof.; 1929-36, o. Prof.
1936-48, U. Tübingen, o. Prof.

GOUDSMIT: 23 Dec 26 (60,9); 8 Mar 27 (61,2); 6 Apr 27 (61,3); 2 Jun 27 (61,4); 2 Aug 27 (61,6); 26 Nov 27, 1 Dec 27, (61,7); 24 Jun 29 (63,5); 30 Aug 29 (63,6); 2 Feb 30 (64,2).
LANDÉ,: 7 Mar 21, 3 May 21, 4 Jun 21, 13 Aug 21, (4,15).
SOMMERFELD: 2 Apr 20, 29 Apr 20, 18 Jun 20, 23 Jun 20, 7 Jun 21, 14 Jun 21, 5 Jul 21, 16 May 22, 20 Feb 31, 2 Apr 35, (29,5).

See: GOUDSMIT, SOMMERFELD.

See: PAULING.

1894-99, U. Liverpool.
1899-1902, U. Cambridge, 1851 Exhibition Scholar with J. J. Thomson.
1902-09, U. Liverpool: 1902-05, Oliver Lodge Fel.; 1904, D. Sci.; 1905-07, Demonstrator and Lab. Asst.; 1907-09, Lect.
1909-13, U. London, Prof.
1913-44, U. Edinburgh, Prof.

RUTHERFORD COLLECTION, Cavendish Laboratory, Cambridge, England. Letters to Rutherford, 27 Dec 09, 15 Dec 11 to 12 Jul 13, 13 Jun 20, 29 Mar 21.
BEDFORD COLLEGE LIBRARY, University of London, London, England. Letters to W. Wilson, 27 Feb 30, 8 Apr 30.
ROYAL SOCIETY LIBRARY, London, England. 4 letters, 1916-17.
DEUTSCHE STAATSBIBLIOTHEK, Berlin, Germany [DDR]. Letter to Scheel, 4 Sep 1943 (Fic* 1903); Letter to Iklé, 1908.

According to his son, Dr. H. M. Barkla, most of Barkla's papers, including research notebooks kept during the last twenty years of his life, were destroyed after his death.

1898-1904, U. Paris.
1904-05, U. Göttingen, then U. Berlin.
1905-12, U. Paris, Res. Asst. to J. Perrin: 1912, Dr. ès sci.
1913-14, École de Phys. et de Chimie, Paris, Prof. Suppléant.
1914-17, Milit. Serv. and War Prisoner, Germany.
1917-18, U. Zurich, with P. Weiss.
1919-28, U. Strassburg, Maitre des Conférences, then Prof. sans chaire.
1928-41, Collège de France, Sous-Dir., Phys. Lab.

Two sessions, 23 pp. transcript.

KRAMERS: 6 Nov 51 (11,2).

DUKE UNIVERSITY ARCHIVES, Durham, N.C. 6 Letters to London, 1934-36. See: LONDON.

1920-25, U. Munich: 1925, Dr. phil. with A. Sommerfeld.
1925-26, U. Madrid, Rockefeller Found. Fel., Phys. Inst.
1926-33, U. Munich, Asst. to Sommerfeld: 1930-1933, Priv.-Doz.
1933-46, U. Giessen, o. Prof.

GOUDSMIT: 22 Mar 26 (60,6).
SOMMERFELD: 9 Nov 34, 4 Dec 34, 13 letters 1936-47 (29,7).

1906-09, U. Freiburg/Breisgau: 1909, Dr. phil.
1909-26, Physicist, industry.
1922-26, U. Berlin, Priv.-Doz.
1926-36, Techn. Hochsch. Berlin, o. Prof.
1936-55, U. G6ttingen, o. Prof.

KRAMERS: 7 Aug 24, 26 Mar 25, 4 Apr 25, (8,2) 3 letters 1943-47 (11,2).
SOMMERFELD: 25 Jul 28, 4 Jun 32, 1 Mar 39, (29,8).

See: KRAMERS, SOMMERFELD.

BOHR COLLECTION, Copenhagen, Denmark. Letter to Bohr, 9 Dec 23.
DUKE UNIVERSITY ARCHIVES, Durham, N.C. Letter to London, 25 Oct 37. See: LONDON.

1897-1903, École Polytechnique, Paris.
1900-03, U. Paris.
1903-48, Muséum d'Histoire Naturelle, Paris: 190309, Sous-Dir.; 1909-48, Prof.
1911-29, École Polytechnique, Paris, Répetiteur.

KRAMERS: 8 Nov 30, 9 Nov 30, 20 Nov 30, 31 Jan 31, 16 Mar 31, 7 Aug 31, 31 Aug 31, 16 Sep 31, 20 Sep 31, 15 Nov 31, 7 Jan 32, 22 Feb 32, 5 Mar 32, 8 May 32, 15 Aug 32, 16 Sep 32, 30 Sep 32, 8 Oct 32, 15 Oct 32, 19 Oct 32, 26 Oct 32, 19 Nov 32, 25 Nov 32, 11 Jan 33, 28 Jan 33, 18 Feb 33, 7 Mar 33, 25 Mar 33, 28 Mar 33, 6 May 33 [by Gabrielle Becquerel], 31 Oct 33, 31 Dec 33, 10 Feb 34, 23 Feb 34, 28 Feb 34, 1 Mar 34, 23 Mar 34, 5 Apr 34, 4 Oct 34, 10 Oct 34, 12 Sep 35, 10 Oct 35, 23 Nov 35, 17 letters 1936-39, (9,2); 15 letters 1941-51 (11,4).

See: KRAMERS, VAN VLECK.

Reproduction of a manuscript of a paper, "Théorie du métamagnétisme," (9,3).

DEUTSCHE STAATSBIBLIOTHEK, Berlin. Material at present held at the Westdeutschen Bibliothek, Marburg/Lahn, Germany [BRD]. Letter to Kayser [undated]. (Darmstaedter Coll., Fic 1910)
RIJKSMUSEUM VOOR DE GESCHIEDENIS DER NATUURWETENSCHAPPEN, Leiden, The Netherlands. Letter to Kamerlingh-Onnes, 24 Feb 26; to W. Tuyn, 1952; to Inst. International du Froid, 1930.
EINSTEIN COLLECTION, Princeton, N.J. Correspondence with Einstein, 5 items 1951.

1901-10, U. Jassy: 1905-10, Asst.
1910-14, U. Paris.
1914-27, U. Jassy: 1914-19, Chargé de Conférences; 1919, Dr. ès sci . with D. Hurmuzescu [Jassy] and G. Lippmann [Paris]; 1919-20, Maître de Conférences - 1920-27, Prof. Suppléant.
1927-c. 35, U. Cernauti [Czernowitz]: 1927-30, Asst. Prof.; 1930-c. 35, Prof.

BOHR COLLECTION, Copenhagen, Denmark. Letters to Bohr, 8 Aug 24, 19 Dec 25, 31 Dec 25, 9 Jul 26, 12 Sep 26, 9 Jan 35, 10 Mar 35, 11 Jul 35, 6 letters 1942-56. See: BOHR.

1893-1910, U. Uppsala: 1904, Fil. Dr. with K. Angström; 1904-10, Lect.
1911-22, Tekn. Högsk. Stockholm, Prof.
1922-35, U. Stockholm, Dir., Metallurgical Inst.

BOHR: 27 Sep 18 (BSC 1,2).

BOHR COLLECTION, Copenhagen, Denmark. Letters to Bohr, 8 Sep 29, 27 Mar 30, 1941. See:
BOHR.
LIBRARY OF THE SWEDISH ACADEMY, Stockholm, Sweden. Letters to Oseen, 23 Sep 13, 10 Oct 13, 17 Mar 14, 23 Apr 14, 17 Jul 18, 11 Mar 20, 12 Sep 20, 29 Sep 20, 28 Apr 21, 18 May 35, 1 letter [undated].

1881-85, U. Berlin and U. Breslau: 1885, U. Breslau, Dr. phil. with O. E. Meyer.
c. 1885-c. 1913, Allg. Elektr. Ges., Berlin, Head, Phys. Lab.
1913-35, Editor, Naturwiss.

BOHR: 7 Mar 16, 7 Jun 18, (BSC 1,2).
KRAMERS: 30 Jul 24, 20 Aug 24, (8,2).
PLANCK: 28 Jul 34 (29,8).
SOMMERFELD: 31 Oct 33, 8 Dec 33 15 31 Jul 35, 28 Aug [35], (29,8).

See: KRAMERS, SOMMERFELD.

BOHR COLLECTION, Copenhagen, Denmark. Letter to Bohr, 5 Jul 23. See: BOHR.
DEUTSCHE STAATSBIBLIOTHEK, Berlin, Germany [DDR]. Letter to Lewin, 1912. (Lewin)
DEUTSCHE STAATSBIBLIOTHEK, Berlin. Material at present held at the Westdeutschen Bibliothek, Marburg/Lahn, Germany [BRD]. Letter to Adolf Baginsky, 1904; to Paul Ehrlich, 1911; 2 to Elster and Geitel, 1913-16; 4 to Anton Krause, 1916; 4 to Adolf Seitz, 1921-26. (Darmstaedter Coll., G2 1900)
BAYERISCHE STAATSBIBLIOTHEK, Munich, Germany [BRD]. Letter to Franz Boll. 1916.
RIJKSMUSEUM VOOR DE GESCHIRDENIS DER NATUURWETENSCHAPPEN, Leiden, The Netherlands. 5 Letters to Ehrenfest, 1930-31.
EINSTEIN COLLECTION, Princeton, N.J. Correspondence with Einstein, 5 items 1919-24, 2 items 1930.
DUKE UNIVERSITY ARCHIVES, Durham, N.C. Letters to London, 21 Jan 29, 23 May 29, 17 Nov 30, 11 Mar 33. See: LONDON.

1924-26, U. Frankfurt-am-Main.
1926-28, U. Munich: 1928, Dr. phil. with A. Sommerfeld.
1928-29, U. Frankfurt-am-Main, Priv.-Doz. 1929-30, Techn. Hochsch. Stuttgart, Priv.-Doz., then U. Munich, Priv.-Doz.
1930-32, Rockefeller Found. Fel.: U. Cambridge and U. Rome.
1932-33, U. Tübingen, Priv.-Doz.
1933-34, U. Manchester, Lect.
1934-35, U. Bristol, Fel.
1935-to date, U. Cornell: 1935-37, Asst. Prof. 1937 to date, Prof.

One session, 22 pp. transcript.

MØLLER: 25 Mar 32, 30 Apr 32 (59,4).
SOMMERFELD: 5 Jan 33, 15 Jan 33, (29,9).

See: MØLLER, SOMMERFELD.

BOHR COLLECTION, Copenhagen, Denmark. Letters to Bohr, 27 Jul 33, [Jul 33], 19 Aug 33, 30 May 34, 24 Aug 34, 28 Sep 34, 5 letters 1936-54.
PAULI COLLECTION, Zurich, Switzerland. See: PAULI.
CORNELL UNIVERSITY ARCHIVES, Ithaca, N.Y. Personal papers.
DUKE UNIVERSITY ARCHIVES, Durham, N.C. Letter to London, 8 Jun 34. See.: LONDON.

1905-13, U. Wisconsin.
1913-18, U. Syracuse: 1913-15, Instr.; 1915-18, Asst. Prof.
1914, U. Wisconsin, Ph.D. with C. E. Mendenhall.
1919-54, U. California, Berkeley: 1918-20, Instr.;
1920-22, Asst. Prof.; 1922-26, Assoc. Prof.; 1926-54, Prof.

BOHR: 10 Nov 19, 28 Apr 22, (BSC 1, 2).
CONDON: 9 Nov 26 (50, 7).
KEMBLE: 6 Feb 23, 22 Mar,23, 4 Jun 23, (50,1); 10 Jul 24, 15 Aug 24, 12 Sep 24, 21 Dec 24, (50,2); 24 Jan 25. 13 Feb 25, 17 Feb 25, 28 Mar 25, 31 Mar [25], 23 Apr 25, 6 Jun 25, (50,3); 8 Jun 25, 20 Jun [25], 22 Jun [25], 25 Jun [25]. 6 Jul 25, 12 Aug 25, 21 Aug 25, 23 Aug 25, 29 Aug 25, 5 Sep 25, (50, 4); 20 Oct 25, 29 Oct 25, 7 Nov 25, 8 Nov 25, 17 Nov 25, 30 Nov 25, 21 Dec 25 (50,5); 11 Jan 26, 20 Feb 26, 4 Jun 26, 7 Jun 26, (50,6); 26 Jun 26, 11 Aug 26, 13 Aug 26, 26 Aug 26, 5 Oct 26, 21 Oct 26, 28 Oct 26, 9 Nov 26, 15 Nov 26, 3 Dec 26, 11 Dec 26, 17 Dec 26, 10 Jan 27, 26 Feb [27], (50,7); 27 Oct 27, 3 Jan 28, 21 Feb 28, 10 Mar 29, (50,8); 2 Oct 28, 3 Oct 28, 2 Jan [29], 10 Jan 29, 21 Jan 29, 12 Feb 29, 2 Mar 29, 23 Oct 29, (50,9); 22 Apr 31, 10 May 32, 16 May 32, 3 Jun 32, 12 Nov 32, (50,10); unidentified postscript [undated] (50, 1).
VAN VLECK: 16 Jun 25, 4 Jul 25, 12 Mar 26, 23 Mar 26, 1 Jun 26, 24 Aug 26,20 Sep 26, 23 Sep 26, 7 Oct 26, 13 Oct 26, 15 Nov 26, 28 Dec 26, 1 5 Jan. 27, 3 Feb 27, 10 Mar 27, 25 Aug 27, 8 Jun 28, 28 Dec 28, (49,2).

See: BOHR, KEMBLE, LOOMIS, VAN VLECK.

BOHR COLLECTION, Copenhagen, Denmark. Letter to Bohr, 7 May 23, 7 letters 1936-55, 1 letter [undated]. See: BOHR.
REGIONAL CULTURAL HISTORY PROJECT, University of California, Berkeley, Calif. Autobiographical narrative prepared from tape-recorded
Interviews. (Microfilm copy at American Institute of Physics, New York.)
AMERICAN INSTITUTE OF PHYSICS, New York, N.Y. Autobiographical memoir. Tape-recorded interview. Correspondence and papers relating to American Association of Physics Teachers during 1930's. Letter to Gordon Fulcher, 1952.

1893-96, U. Manchester.
1896-1900, U. Cambridge: 1896-98, Univ. Scholar; 1898-99, Beatson Scholar; 1900, M.A.
1900-29, U. Cambridge: 1900-1901, Fel; 1901-12. Lect.; 1912-29, Asst. Tutor.

BOHR COLLECTION, Copenhagen, Denmark. Letters to Bohr, 1 Oct 25, 17 Feb 26, 26 Apr 28, 19 May 28, 4 Jun 28. See: BOHR.

1897-1908, U. Copenhagen: 1902-08, Asst.; 1908, Dr. phil.
1912-14, U. Copenhagen, Lect.
1914-49. Agricultural High School, Copenhagen, Prof.

BOHR: 29 Nov 18 (BSC 1,3).

BOHR COLLECTION, Copenhagen, Denmark. Letters to Bohr, 1 Jan 29, 10 Mar 29, 28 Jul 30, 6 letters 1946-59.

1919-24, U. Cambridge: 1921, B.A.; 1921-24, Res. Asst. to E. Rutherford.
1924-25, U. Göttingen with J. Franck.
1925-33, U. Cambridge, Res. Asst. to E. Rutherford.
1933-37, U. London, Prof.
1937-61, U. Manchester, Prof.

One unrecorded session, 4 pp. of notes.

HEISENBERG: 10 Sep 38 (45,1).
SCHRÖDINGER: 19 Feb 47 (37,2).

BOHR COLLECTION, Copenhagen, Denmark. Letters to Bohr, 5 Sep 30, 18 Sep 30, 13 Aug 33, 16 Sep 33, 17 letters 1936-61. See: BOHR.
RUTHERFORD COLLECTION, Cavendish Laboratory, Cambridge, England. Letters to Rutherford, 18 Nov 22, 1936-37. See: RUTHERFORD.
BEDFORD COLLEGE LIBRARY, University of London, London, England. Letter to W. Wilson, 1947.

1924-27, Eidgn. Techn. Hochsch. Zurich.
1927-28, U. Leipzig: 1928, Dr. phil. with W. Heisenberg.
1928-29, Eidgn. Techn. Hochsch. Zurich, Asst. to W. Pauli.
1929-30, U. Utrecht, Lorentz Fel. with H. A. Kramers.
1930-31, U. Leipzig, Asst.
1931-32, U. Copenhagen, Ørsted Fel. with N. Bohr.
1932-33, U. Leipzig, Priv.-Doz.
1933-34, Inst. Henri Poincaré, Paris, Lect., then U. Rome Intl. Educ. Board Fel. with E. Fermi. 1934-41, Stanford U.: 1934-36, Assoc. Prof.; 1936-41, Prof.

Two sessions, 40 pp. transcript.

KRAMERS: 24 Jan 38 (9,1).
WENTZEL: 24 Dec 33 (66,3).

BOHR COLLECTION, Copenhagen, Denmark. Letters to Bohr, 20 Jul 31, 5 Aug 31, 24 Aug 31, 28 Jan 32, 14 May 32, 12 Jul 32, 26 Jul 32, 2 Sep 32, 20 Sep 32, 5 Nov 32, 14 Nov 32, 17 Nov 32, 30 Dec 32, 6 Apr 33, 10 Feb 34, 8 letters 1936-55. See: BOHR.
DUKE UNIVERSITY ARCHIVES, Durham, N.C. Letter to London, 4 Jun 28.

1903-11, U. Copenhagen: 1911, Dr. phil. with C. Christiansen.
1911-12, U. Cambridge with J. J. Thomson, then U. Manchester with E. Rutherford.
1912-14, U. Copenhagen: 1912-13, Asst. to M. Knudsen; 1913-14, Lect.
1914-16, U. Manchester, Reader.
1916-62, U. Copenhagen, Prof.: 1920-62, Dir., Inst. Theor. Phys.
Misc.: 1922, U. Göttingen, Lect.
1923, Various. cities in the U.S.A., Lect.
1931, U. Cambridge, Lect.
1933, Calif. Inst. Techn., Lect.
1938-39, Inst. Adv. Study, Princeton, Fel.

Five sessions, 67 pp. transcript.
Two sessions with his widow, Margrethe Bohr, 37 pp. transcript.
One session with his long-time secretary, Fru Betty Schultz, 23 pp. transcript.

ADAMS: 12 Jun 20 (BSC 1,1).
ANDRADE: 7 Mar 19 (BSC 1,1).
BENEDICKS: 27 Sep 18 (BSC 1,2).
BIRGE: 19 May 22 (BSC 1,2).
A. H. COMPTON: 27 Apr 22, 20 Sep 22, (BSC 1,3).
K. T. COMPTON: 11 Aug 22 (BSC 6,2).
COSTER: 20 Jul 20, 19 Mar 21, [Mar 21 by Kramers], 10 Jan 22, 14 Jan 22, 18 Jan 22, 27 Jan 22, 3 Jul 22, 8 Jul 22 [by Hansen], 5 Aug 22, (BSC 1,4); 15 Mar 35 (66,3).
COURANT: 12 Apr 22, 19 May 22, 15 Jul 22, 29 Jul 22, (BSC 1,4).
DARWIN: [Jul 19], 14 Feb 22, 20 Sep 22, 21 Dec 22, (BSC 1,4); 2 letters 1937-[39] (36,1).
DEBYE: 1 letter 1911 (BSC 1,4).
DENNISON: 9 Jun 27 (59,1).
DIRAC: 5 Dec, 29 (9,5).
EHRENFEST: 5 May 18, [25 Jan 19], [1919], 22 Oct 19, [1920], 22 Nov 20, 20 Jan 21, 18 Feb 21 [by Kramers], 23 Mar 21, 28 Mar 21, 12 Apr 21, 28 Jun 21, 10 Jul 21, [Jul-Aug 21], 1 Sep 21, 16 Sep 21, 10 Oct 21, 24 Oct 21, 11 Nov 21, 19 May 22, (BSC 2,1); 22 Dec 25 (60,5).
EINSTEIN: 24 Jun 20, 22 Jan 21, 11 Nov 22, (BSC 2,2).
EPSTEIN: [Oct 18] (BSC 2,2).
EVANS: 9 Oct 13, [1914], 1 Aug 16, (BSC 2,2).
FOKKER: 14 Feb 16 (BSC 2,3).
FOOTE: 21 Jul 21, 20 Nov 2i, BSC 2,3).
A. FOWLER: 5 Nov 13, 13 Mar 14, 15 Apr 14, 28 Apr 14, 21 Oct 14, 23 Feb 15, 26 Feb 20, 30 Apr 21, 22 Oct 21, 22 Jul 22, (BSC 2,3).
FRANCK:18 Oct 20, 30 Oct 20, 27 Nov 20, 29 Dec 20, 29 Jan 21, 12 Apr 21, 28 Jun 21, 18 Jul 21, 22 Aug 21, 16 Sep 21, 27 Sep 21, 8 Nov 21, 10 Dec 21, 1 Mar 22, 15 Jul 22, 8 Sep 22, 29 Dec 22, (BSC 2,4).
FRICKE: 7 Nov 14, 9 Jun 19, 21 Feb 20, (BSC 2, 4).
GARBASSO: 7 Feb [14] (BSC 2,5).
GEIGER: 9 Dec 22 (BSC 2,5).
GERLACH: 18 Feb 22 (BSC 2,5) (19,1).
GERTHSEN: 9 Nov 20, 23 Nov 20, (BSC 2,5).
GOUDSMIT: 17 Apr 26 (60,6); 16 Aug 27 (61,6); 3 Jun 30 (64,4); 28 Dec 32 (65,8).
GROTRIAN: 22 Jul 22 (BSC 2,5).
HAAS: 11 Apr 22 (BSC 3,1).
HANSEN: 8 Nov 14, 12 May 15, 24 Mar 16, 8 Jul 22 [by Coster], (BSC 3,1).
P. HERTZ: 8 Oct 21, 14 Nov 21, 26 Jan 22, 20 Feb 22, [29] Apr 22, 28 Sep 22, 15 Nov 22 (by Pauli], 2 Dec 22 [by Pauli], 1 letter [undated], (BSC 3, 2).
HERZFELD: 2 Mar 14 (BSC 3,2).
DE HEVESY: 7 Feb 13, 17 May 13, 30 Jul 13, 1 Sep 13, 23 Sep 13, 25 Sep 13, 13 Oct 13, 22 Dec 13, 10 Apr 14, 25 May 14, 1 Jul 14, 5 and 8 Aug 14, 14 May 15, 15 Jul 15, 14 Mar 19, 1 Jul 19, 9 Aug 19, 1 Sep 19, 19 Oct 19, 30 Nov 19, 23 Dec 19, 19 Jan 20, 10 Apr 20, 1 Jun 20, 25 Nov 20, 10 Jun 22, (BSC 3,3).
HILBERT: 22 Nov 20, 4 Dec 20, (BSC 3,4).
HORTON: 9 Mar 20 (BSC 3,4).
HOYT: 14 Jul 22, 28 Aug 22, (BSC 3,4).
HUGHES: 25 Jan 21 (BSC 3,4).
JORDAN: 25 Apr 27, 14 May 28, (18,1).
KAMERLINGH-ONNES: 9 Mar 19 (BSC 5,4).
KLEIN: 5 Apr 18, 9 Jan 19, 20 Feb 20, 23 Feb 20, Feb 21, 24 May 21, 26 Sep 22, (BSC 4,1).
KONEN: 23 Dec 22 (BSC 4,2).
KOSSEL: 19 Jul 21 (BSC 4,2).
KRAMERS: 15 Nov 17 (BSC 4,2); 30 Jul 21, 15 Jul 22, (BSC 4,2) (8,2); 23 Sep 24 (8,2); 11 Nov 26, 26 May 27, 5 Dec 29, 7 Dec 29, 9 Apr 33, 10 Oct 35, (9,5); 5 letters 1936-[39] (9,5); 20 letters 1942-52 (11,7).
KRONIG: 24 Nov 24, 26 Mar 26, 28 Oct 26, 18 Mar 27, (16,1).
LADENBURG: 14 Jun 20, 16 Jul 20, 2 letters 29 Sep 20, 23 Dec 22, (BSC 4,3).
LANDÉ,: 26 Jun 19, 24 Feb 20, 29 Jul 20, 12 Aug 20, 23 Aug 20, 20 Sep 20, 14 Feb 21, (BSC 4,3) (4,1); 28 Feb 21 (BSC 4,3); 4 Jul 21, 9 May 22, 15 May 22, (BSC 4,3) (4,1); 3 Mar 23, 10 Jan 25, (4,1).
LANGMUIR: 17 Dec 13, 3 Dec 20, 20 Sep 22, (BSC 4, 3).
LARMOR: 6 Feb 09, 4 Apr 09, (BSC 4,4).
VON LAUE: 11 Nov 18, 19 May 22, (BSC 4,4).
LEWIS: 2 Mar 16, 24 Mar 16, 22 May 16, 10 Aug 16, 26 Aug 16, (BSC 4,4).
LORENTZ: 13 Jun 20, 20 Jan 21, 9 Mar 21, 26 May 21, 1 Sep 21, 31 May 22, (BSC 4,4).
LYMAN: 11 Aug 22 (BSC 6,2); 19 Sep (BSC 4,4).
MARSDEN: 8 Apr 13, 3 Nov 13, 23 Jan 15, (BSC 5,1).
McLAREN: 17 Dec 11, 1 Sep 13, (BSC 5,1).
MCLENNAN: 13 Nov 20, 25 Jan 21, 30 Aug 22, 19 Sep 22, 27 Oct 22, 4 Nov 22, (BSC 5,1).
MEGGERS: 19 Sep 22 [by Franck] (BSC 5,1).
MEYER: 3 Feb 20, 5 Mar 20, 24 Aug 20, (B SC 5,2).
MILLIKAN: 20 Sep [22] (BSC 5,2).
MINKOWSKI: 29 Jul 22 (BSC 5,2).
MØLLER: 14 Jun 28 (59,4).
MOSELEY: 21 Nov 13 (BSC 5,2).
OSEEN: 1 Dec 11, 7 Mar 12, 5 Feb 13, 13 Feb 13, [1 Jul 13], 11 Aug 13, 17 Oct 13, 1 Jan 14, 3 Mar 14, 10 Mar 14, 18 Mar 14, 28 Sep 14, 20 Dec 15, 17 Mar 16, 28 Feb [17], 7 May 18, 4 Jan 22, 30 Aug 22, (BSC 5,4).
OWEN: 23 Apr 13 (BSC 5,5).
PAULI: 3 Jul 22, 8 Sep 22, (BSC 5,5).
PLANCK: 8 Apr 20, 21 Apr 20, 1 May 20, (Oct 211, (BSC 5,5).
RAUSCH VON TRAUIBENBERG: 20 Oct 20 (BSC 8,1).
RICHARDSON: 10 Feb 14, 9 Apr 14, 29 Sep 15, 16 Oct 15, 15 Aug 18, 25 Jan 19, 26 Feb 20, 20 May 20, 12 Jun 20, 3 Feb 21, 23 Mar 21, 2 letters 30 Apr 21, 18.Jul 21, 22 Oct 21, 14 Jul 22, (BSC 6,1).
ROZHDESTWENSKY: 27 May 21 (BSC 6,2)
ROSSELAND: 8 Mar 20, 14 Aug 20, 15 Feb 21, 21 Jun 21, 5 Apr 22, (BSC 6,2).
RUBINOWICZ: 20 Nov 19, 16 Jan 20, 17 Jan 20, 5 Feb 20, 4 Mar 20, 18 Mar 20, 30 Mar 20, 8 Apr 20, 16 Apr 20, 26 May 20, (BSC 6,2) (17,A); 14 Jul 20 (17,A); 16 Jul 20 (BSC 6,2); 10 Oct 20, 14 Jun 21, (BSC 6,2) (17,A); 15 Aug 21 (BSC 6,2); 16 Aug 21 (17,A); 22 Aug 21, 3 Jan 22, 29 Sep 22, (BSC 6,2) (17,A); 6 Jan 33, 24 Mar 33, 21 Aug 33, 10 letters 1937-62, (17,A).
RUTHERFORD: 18 Jan 12, 28 Jan 12, 4 Nov 12, 31 Jan 13, 6 Mar 13, 21 Mar 13, 26 Mar 13, 8 Apr 13, 10 May 13, 10 Jun 13, 22 Jun 13, 1 Jul 13, 29 Jul 13, 27 Aug 13, 16 Oct 13, 21 Dec 13, 31 Dec 13, 20 Jan 14, 10 Feb 14, 10 Mar 14, 21 Mar 14, 11 Apr 14, 6 Sep 16, [Dec 17], 11 May 18, 24 Nov 18, Dec 18, [Jul 19], 20 Oct 19, 10 Dec 19, 3 Feb 20, 27 Jul 20, 22 Nov 20, 18 Jan 21, 22 Jan 21, 1 Feb 21, 14 Feb 21, 23 Mar 21, 26 Apr 21, 29 Apr 21, 30 Apr 21, 22 Aug 21, 16 Sep 21, 5 Oct 21, 24 Oct 21, 26 Oct 21, 8 Nov 21, 4 Feb 22, [Feb 22], 22 May 22, 31 May 22, 20 Nov 22, (BSC 6,3).
SCHAEFER: 30 Dec [22] (BSC 7,1).
SCHEEL: 10 Jul 20, 12 Aug 20, 27 Sep 20, 9 Oct 20, 17 Oct 20, 18 Oct 20, 19 Oct 20, 17 Nov 20, 14 Jun 21, 7 Jul 21, 25 Nov 21, 23 Dec 21, 4 Jan 22, 15 Feb [22], 3 Mar 22 [by Kramers], 11 Nov 22, 13 Nov 22, 11 Dec 22, 29 Dec 22, (BSC 7,1).
SCHRÖDINGER: 15 Jun 21,(BSC 7,1); 2 Dec 26 (41,7).
SCHWARZSCHILD: 23 Feb 14, 25 May 14, (BSC 7,1).
SEELIGER: [undated], 14 Jun 20, 10 Sep 20, (BSC 7,2).
SIEGBAHN: [4 Jul 19], 3 Aug 19, 9 [Aug] 19, 20 Nov 20, 7 Mar 21, 10 Jun 22, 20 Jun 22 [by?], (BSC 7,2).
SMEKAL: [Mar 21] (BSC 7,2).
SOMMERFELD: 22 Oct 13, 19 Mar 16, 7 May 18, 26 Dec 18 27 Jul 19, 28 Aug 19, 30 Aug 19, 13 Sep 19, 9 6ct 19, 12 Oct 19, 14 Oct 19, 19 Nov 19, 8 Nov 20, 22 Feb 21, 16 Sep 21, 2 Mar 22 (by Kramers], 30 Apr 22, 24 May 22 [by Kramers], 7 Jun 22 [by Kramers], (BSC 7,3); 23 Oct [35] (29,10).
STARK: 14 Dec 13, 31 Mar 14, (BSC 7,3).
TAKAMINE: 13 Nov 20, 27 Jan 21, (BSC 8,1).
WARBURG: 8 Jan 14 (BSC 8,3).
WEREIDE: 30 Aug 22, 11 Sep 22,,(BSC 8,3).
WERNER: 1 Mar 22 (BSC 8,3).
WHIDDINGTON: 23 Nov 20 (BSC 8,3).
WOOD: 19 Sep 22 (BSC 8,3).
ZEEMAN: 31 May 22 (BSC 8,3).

See: ABRAHAM, ADAMS, ANDRADE, BENEDICKS, BERLINER, BIRGE, BJERRUM, BORN, BRAGG, BRILLOUIN, J. M. BURGERS, A. H. COMPTON, COSTER, COURANT, DARWIN, DEBYE, DIRAC, EHRENFEST, EINSTEIN, EPSTEIN, EVANS, FAJANS, FOKKER, FOOTE:, A. FOWLER, FRANCK, FRICKE, GARBASSO, GEIGER, GERLACH, GERTHSEN, GOUDSMIT, HAAS, HANSEN, HEISENBERG, P. HERTZ, HEVESY, HILBERT, HOLTSMARK, HORTON, HOYT, HUGHES, KAMERLINGH-ONNES, KAYSER, KEESOM, KLEIN, KONEN, KOSSEL, KRAMERS, LADENBURG, LANDÉ, LANGMUIR, LARMOR, VON LAUE, LENZ, LEWIS, LINDSAY, LORENTZ, LYMAN, MARSDEN, McLAREN, MCLENNAN, MEITNER, MEYER, MILLIKAN, MINKOWSKI, MOSELEY, NAGAOKA, NORDSTRÖM, OSEEN, OWEN, PAULI, PLANCK, RAUSCH VON TRAUENBERG, RICHARDSON, ROZHDESTWENSKY, ROSSELAND, RUBINOWICZ, RUTHERFORD, SCHAEFER, SCHEEL, SCHRÖDINGER, SEELIGER, SIEGBAHN, SILBERSTEIN, SMEKAL, SOMMERFELD, STARK, TAKAMINE, THIRRING, VEGARD, WEREIDE, WHIDDINGTON, ZEEMAN.

Notes for a paper, "On the mechanical problem of the motion of a nuclear atom with two electrons," 70 sheets, 1916-17 (27, 1-7).
Account book for Universitetets Institut for Teoretisk Fysik, 100 sheets, 1919-23 (35,3).
Lectures on Atomic Physics, notes taken by Minkowski, Göttingen, June 22 (3,1).
Typescript draft, "The Quantum Postulate and the Recent Development of Atomic Theory," [unpublished] 12 pp., 12 Oct 27 (36,1).
Register book of foreign guests, Universitetets Institut for teoretisk Fysik, 18 sheets, 1919-56 (35,2).
Skolenoter, [School notes] [Harald Bohr] 74 pp., [undated] (Bohr MSS 1,1).
Halogenerne [The halogens], 4 pp., [undated] (Bohr MSS 1,1).
Mathematikopgaver, (Mathematics problems], 5 pp., [undated] (Bohr MSS 1,1).
Fysikopgave, [Physics problem], 1 p. -[undated] (Bohr MSS 1,1).
Regneøvelser, [Course on numerical calculations], 25 pp., [undated] (Bohr MSS 1,1).
Theoretisk astronomi, [Theoretical astronomy], 27 pp., [undated] (Bohr MSS 1,1).
Fysiske Øvelser 1, [Physical experiments 1], 3 pp., [1904] (Bohr MSS 1,1).
Mathematiske opgaver I, [Mathematics problems I] 40 pp., [1904] (Bohr MSS 1,1).
Mathematiske opgaver II, [Mathematics problems II], 23 pp., [1904] (Bohr MSS 1,1).
Radioaktive Forvandlinger, [Radioactive transmutations], 19 pp., [1905-09?] (Bohr MSS 1,1).
Kurver vedrorende overfladespaending [Curves concerning surface tension], 3 pp., [1905-06?] (Bohr MSS 1,2).
Udregninger vedrørende vaeskestraaler, [Calculations concerning liquid jets], 37 pp., [1905-06] (Bohr MSS 1,2).
Fysiske Øvelser II, [Physical experiments II], 19 pp., 1906 (Bohr MSS 1,2).
Noter, vedrorende overfladespaending, (Notes concerning surface tension] 7 pp., [undated] (Bohr MSS 1,2).
Fotografier til prisopgave, [Photographs for prize paper.], 19 pp., (Bohr MSS 1,2).
Prisopgave, [Prize paper], 114 pp., [1906] (Bohr MSS 1,2).
Bilag til prisopgave, [Enclosure to prize paper], 20 pp., 1906 (Bohr MSS 1,2).
Bedømmelse af prisopgave, [Opinion on prize paper], 11 pp., 1907 (Bohr MSS 1,2).
Lykønskningsbreve, [Letters of congratulation], 11 pp., 1907 (Bohr MSS 1,2).
Eksperimenter over overfladespaending, [Experiments on surface tension], 4 pp., 1908 (Bohr MSS 1,2).
Resumé af afhandlinger, [Summaries of papers], 28 pp., [1908-13?] (Bohr MSS 1,3).
Optegnelser til metarernes elektronteori, [Notes for the electron theory of metals], 1 p., [1908-11 ?] (Bohr MSS 1,3).
Opgave til magisterkonferens, [Paper for the Master's degree], 49 pp., 1909 (Bohr MSS 1,3).
Forsøg med natriumamalgam, [Experiments with sodium amalgam], 4 pp., 1910 (Bohr MSS 1,4).
Litteraturoversigt til disputats 1, (Bibliography for thesis II, 13 pp., [1910-11] (Bohr MSS 1,4).
Litteraturoversigt til disputats II, [Bibliography for thesis II], 10 pp., [1910-11] (Bohr MSS 1,4).
Beregninger vedrørende elektronteori, [Calculations concerning electron theory], 66 pp., [1910-11] (Bohr MSS 1,4).
Ikke-stationaere problemer, [Non-stationary problems], 4 pp., [1910-11] (Bohr MSS 1,4).
Beregninger vedrorende termoelektricitet, [Calculations concerning thermoelectricity], 2 pp., [1910-11] (Bohr MSS 1,4).
Metallernes elektronteori, [The electron theory of metals], 177 pp., [1911] (Bohr MSS 2,1).
Metallernes elektronteori (rentryk), [The electron theory of metals (clean proofs)], 212 pp., 1911 (Bohr MSS 2,2).
Tale ved doktordisputats, [Speech at defence of thesis], 3 pp., 1911 (Bohr MSS 1,3).
Navneliste, doktordisputats, [List of names, defence of thesis], 43 pp., [1911] (Bohr MSS 1,3).
Studier over metallernes elektronteori, [A study of the electron theory of metals], 159 pp., 1911 (Bohr MSS 1,4).
On the electron theory of metals 1, 189 pp., [1911] (Bohr MSS 3,1).-
On the electron theory of metals II, 189 pp., [1911] (Bohr MSS 3,2).
Lecture notes, Jeans, 32 pp., 1911 (Bohr MSS 3,3).
Lecture, Phil. Soc. Cambridge, 8 pp., 1911 (Bohr MSS 3,3).
Thermoelektriske forhold, [Thermo-electric phenomena], 8 pp., 1911-12 (Bohr MSS 3,3).
Calculus of variations, 80 pp., 1912 (Bohr MSS 3,3).
Note on the electron theory, 4 pp., 1912 (Bohr MSS 3,3).
Physical experiments, Manchester, 48 pp., 1912 (Bohr MSS 3,3).
Alfa-strålers absorption, [Absorption of alpha rays], 9 pp., [1912] (Bohr MSS 3,4).
Moving electrified particles, 1 p., [1912] (Bohr MSS 3,4).
First draft on atomic models, 7 pp., 1912 (Bohr MSS 3,4).
Absorption af alfa- og beta-stråler, [Absorption of alpha and beta rays], 29 pp., 1912 (Bohr MSS 3,4).
Mekaniske grundlag for termodynamiken, [Mechanical basis of thermodynamics], 76 pp., 1912 (Bohr MSS 4,1).
Dispersion og absorption af alpha-stråler, [Dispersion and absorption of alpha-rays], 40 pp., [1912] (Bohr MSS 4,1).
Rejoinder to Richardson, 4 pp., [1912] (Bohr MSS 4,1).
Bernaerkninger tit afhandling af Stark, [Comments on paper by Stark], 1 p., [1912] (Bohr MSS 4,1).
Numerical Calculations I, 42 pp., [1912-13?] (Bohr MSS 4,2).
Electron distribution among rings, 8 pp., [1912-13?] (Bohr MSS 4,2).
Numerical calculations II, 80 pp., [1912-13?] (Bohr MSS 4,2).
Dissociation og stabilitet, [Dissociation and stability], 6 pp., [1912-13?] (Bohr MSS 4,2).
Special atoms and molecules, 14 pp., [1912-13] (Bohr MSS 4,2).
Numerical calculations 0, 24 pp., [1912-13] (Bohr MSS 4,2).
Kinetisk og potential energi, [Kinetic and potential energy], 7 pp., [1912-13] (Bohr MSS 4,2).
Structure of atoms, 1 p. [1913] (Bohr MSS 4,3).
Orbit of retarded a-particle, 1 p., [c. 1913] (Bohr MSS 4,3).
Orbit of electron, 8 pp., [1913] (Bohr MSS 4,3). Remarks left out in final edition, 10 pp., [1913] (Bohr MSS 4,3).
Litteraturfortegnelse, [Bibliography], 12 pp., [1913] (Bohr MSS 4,3).
Magnetism 1, 55 pp., [1913] (Bohr MSS 4,3). The spectra of helium and hydrogen, 6 pp., 1913 (Bohr MSS 4,4).
Answer to Nicholson I, 8 pp., [1913] (Bohr MSS 4,4).
Spectrum of hydrogen isotope, 2 pp., [1913-14] (Bohr MSS 4,4).
Line spectra and black-body radiation, 1 p., [1913-14] (Bohr MSS 4,4).
Atomic models and X-ray spectra, 2 pp., 1914, (Bohr MSS 4,5).
Answer to Lindemann, 1 p., [1914] (Bohr MSS 4,5).
Metallernes elektronteori, [The electron theory of metals], 32 pp., 1914 (Bohr MSS 4,5).
Scattering of alpha-particles, 12 pp., [1914] (Bohr MSS 4,5).
Comments on letters by Strutt and Andrade, 7 pp., [1914] (Bohr MSS 4,5).
Answer to Nicholson II, 28 pp., [1914] (Bohr MSS 4,5).
Effect of electric and magnetic fields on spectral lines, 4 pp., [1914] (Bohr MSS 4,5).
Stark effect, 6 pp., [1914] (Bohr MSS 4,6).
Undersøgelser over Röntgenstråler, [Investigations on X-rays], 4 pp., 1914 (Bohr MSS 4,6).
Notes on atomic structure, 38 pp., [1914] (Bohr MSS 4,6).
Spectral lines and quantum theory, 5 pp., 1914 (Bohr MSS 4,6).
Deduction of Rydberg's constant, 1 p., 1914 (Bohr MSS 4,6).
Note on scattering of alpha rays, 15 pp., [191415?] (Bohr MSS 5,1).
Scattering and absorption of recoiled particles, 13 pp., [1914-15?] (Bohr MSS 5,1).
Collision between two electrons, 5 pp., [1914-15?] (Bohr MSS 5,1).
Relativity correction, 2 pp., [1914-15] (Bohr mss 5,1).
High frequency spectra, 3 pp., [1914-15] (Bohr MSS 5,1).
Correction to Balmer formula, 10 pp., [1914-15] (Bohr MSS 5,1).
Whiddington's experiments, 4 pp., [1914-15] (Bohr MSS 5,1).
On the series spectrum of hydrogen and the structure of the atom, 15 pp., 1915 (Bohr MSS 5,2).
Thermodynamics I, 30 pp., 1915 (Bohr MSS 5,2).
Thermodynamics II, 58 pp., [undated] (Bohr MSS 5,2).
The spectra of hydrogen and helium, 5 pp., 1915 (Bohr MSS 5,2).
On the decrease of velocity. . . . 2 pp., 1915 (Bohr MSS 5,2).
Isotopics, 7 pp., [1915] (Bohr MSS 5,2).
Refused letter [to Nature?] [1915?] (Bohr MSS 5,2).
Examination questions, 20 pp., 1915 (Bohr MSS 5,2).
Electrodynamics, 25 pp., 1915 (Bohr MSS 5,2).
Remarks on absorption, 5 pp., 1915 (Bohr MSS 5,3).
Decrease of velocity, 2 pp., [1915] (Bohr MSS 5,3).
Frequency of the K lines, 3 pp., [1915] (Bohr MSS 5,3).
Quantum theory of radiation, 14 pp., [1915] (Bohr MSS 5,3).
Moseley, 4 pp., [1915] (Bohr MSS 5,3). Triatomic hydrogen molecule, 6 pp., [1915] (Bohr MSS 5,3).
Properties of isotopes, 18 pp., 1915 (Bohr MSS 5,3).
The kinetic theory of matter 1, 22 pp., 1915 (Bohr MSS 5,3).
Quantum theory and motion of atoms, 2 pp., 1915 (Bohr MSS 5,3).
Magnetism II, 12 pp., [1915-16] (Bohr MSS 5,4).
Motion of ions in a gas, 2 pp., [1915-16] (Bohr MSS 5,4).
Adiabatic transformations, 1 p., [1915-16?] (Bohr MSS 5,4).
Extensions in phase, 4 pp., [1915-16?] (Bohr MSS 5,4).
Statistisk fordeling i kvanteteorien, (Statistical distribution in the quantum theory], 1 p., [1915-16?] (Bohr MSS 5,4).
Rotating molecules, 9 pp., [1915-16?] (Bohr MSS 5,4).
Bjerrum's theory, 3 pp., [1915-16] (Bohr MSS 5,4).
On the application of the quantum theory to periodic systems, 163 pp., [1915-16] (Bohr MSS 5,5).
Notes to chapter III [unpublished paper], 32 pp., [1915-16] (Bohr MSS 5,5).
Kinetic theory of matter II, 4 pp., 1916 (Bohr MSS 5,6).
Electron theory, 4 pp., 1916 (Bohr MSS 5,6). Outlines and notes, 5 pp., [1916?] (Bohr MSS 5,6).
Recent work on spectral lines, 2 pp., [1916] (Bohr MSS 5,6).
X-ray spectra, 7 pp., [1916?] (Bohr MSS 5,6). Ekliptika-kredsen, [The ecliptic circle], 1 p., [1916-19?] (Bohr MSS 5,6).
Quantum applications to dipole field, 5 pp., 1916 (Bohr MSS 5,6).
Mekanisk fysik og elektricitetslaere, (Mechanics and electromagnetism], 68 pp., 1916-17(19) (Bohr M S S 5,6).
Nyere arbejder over atomteorien, [Recent work on the atomic theory], 25 pp., 1916 (Bohr MSS 6,1).
Perturbation calculations, 7 pp., [1916-17?] (Bohr MSS 6,1).
Helium spectrum, 210 pp., 1916-17 (Bohr MSS 6,2).
Luftarters ionisation [Ionisation of gases], 3 pp., 1917 (Bohr MSS 6,3).
Kollokvier, [Colloquia], 4 pp., 1917 (Bohr MSS 6,3).
Om brintatomet, [On the hydrogen atom], 1 p.t 1917 (Bohr MSS 6,3).
Einsteins stralingsteori, [Einstein's theory of radiation], 3 pp., 1917 (Bohr MSS 6,3).
Numerical calculations III, 308 pp., [1917] (Bohr MSS 6,4).
Numerical calculations IV, 46 pp., [1917?] (Bohr MSS 7,1).
Systems of several particles, 26 pp., [1917?] (Bohr MSS 7,1).
Lysets bojning. [The diffraction of light], 2 pp., [1917] (Bohr MSS 7,1).
Virkning af elektriske og magnetiske felter, [Effect of electric and magnetic fields], 2 pp., 1917 (Bohr MSS 7,1).
Forelaesningsnoter, [Lecture notes], 14 pp., 1917 (Bohr MSS 7,1).
Atomteori, [Atomic theory], 2 pp., 1917 (Bohr MSS 7,1).
Principles of the quantum theory, 50 pp., [191718] (Bohr 7,1).
Quantum theory of line spectra. Part III, 228 pp., [1917-18] (Bohr MSS 7,2).
Quantum theory of line spectra. Part IV, 36 pp., [1917-181 (Bohr MSS 7,3).
Note til mundtlig eksamen, [Note for oral examination], 1 p., 1918 (Bohr MSS 7,3).
Elektronteori, (Electron theory], 19 pp., 1918 (Bohr MSS 7,3).
Om grundstoffernes liniespektre, [On the line spectra of the elements], 3 pp., 1918 (Bohr MSS
7,3)
Grundlaget for kvanteteorien, (The basis of the quantum theory), 1 p., 1918 (Bohr MSS 7,3).
Termodynamik, [Thermodynamics], 14 pp., 1918 (Bohr MSS 7,3).
Stellar spectra, 1 p., 1918 (Bohr MSS 7,3).
Mekanik, [Mechanics], 71 pp., 1918-19 (Bohr MSS 7,4).
Drawings to triatomic hydrogen molecule, 6 pp., [1918-19] (Bohr MSS 7,4).
Virkningen af sammenstød mellem atomsystemer og fri elektriske partikler, [The effect of collisions between atomic systems and free electrical particles], 21 pp., [1919?] (Bohr MSS 7,4).
Mekaniske og termodynamiske grundlag for kvanteteorien, [The mechanical and thermodynamical basis of the quantum theory], 18 pp., 1919 (Bohr MSS 7,4).
Problems of the atom and the molecule I, 201 pp., [19191 (Bohr MSS 8,1).
Problems of the atom and the molecule II, 285 pp., 1919 (Bohr MSS 8,2).
Problems of the atom and the molecule III, 38 pp., [19191 (Bohr MSS 8,3).
Trykkets indflydelse på brintlinierne, (The influence of pressure on the hydrogen lines], 15 pp., [1919] (Bohr MSS 8,3).
Atomic physics and the problem of radiation, 19 pp., 1919 (Bohr MSS 8,3).
Rede an Sommerfeld, 2 pp., 1919 (Bohr MSS 8,3).
Korrektion i tilstandsligning, [Correction in equation of state], 1 p., 1919 (Bohr MSS 8,3).
Den nyere atomfysiks program, [The program of contemporary atomic physics], 13 pp., [1919] (Bohr MSS 8,3).
Table of contents, 1 p., [1920] (Bohr MSS 9,1).
Disentanglement of series spectra, 48 pp., ( 1920 ?] (Bohr MSS 9,1).
Indflydelse af et elektrisk felt på finstrukturen, [Influence of an electric field on the fine structure], 16 pp., [1920?] (Bohr MSS 9,1).
Om grundstoffernes seriespektre, [On the series spectra of the elements], 37 pp., [1920] (Bohr mss 9,1).
Vekselvirkningen mellem lys og stof, [The Interaction between light and matter], 27 pp., [1920] (Bohr MSS 9,1).
Serienspektra der Elemente, 190 pp., 1920 (Bohr MSS 9,2).
Virkning af elektriske og magnetiske felter, [Effect of electric and magnetic fields], 2 pp., 1920 (Bohr MSS 9,3).
Generalisation of correspondence principle, 13 pp., [1920?] (Bohr MSS 8,3).
Fortale tit tysk oversaettelse, [Preface to German translation], 45 pp., [1920] (Bohr MSS 9,3).
Atomernes bygning, [The structure of the atoms], 73 pp., [1920] (Bohr MSS 9,3).
Forelaesning i Fysisk Forening, (Lecture in the Physical Society], 10 pp., 1920 (Bohr MSS 9,3).
Indvielsen af Institutet [The inauguration of the institute], 28 pp., 1921 (Bohr MSS 9,4).
Third Solvay Congress, 33 pp., [1921] (Bohr MSS 9,4).
Normaltilstanden af grundstoffernes atomer, [The normal state of the atoms of the elements], 29 pp., 1921 (Bohr MSS 9,4).
Perturbation theory, 13 pp., 1921 (Bohr MSS 9,4).
Zur Frage der Polarisation, 4 pp., [1921] (Bohr MSS 9,4).
Elements within the first period, 10 pp., [1921] (Bohr MSS 9,4).
Constitution of atoms, 27 pp., [1921-22] (Bohr mss 10,1).
Atomic theory and periodic system, 115 pp., [1921-22] (Bohr MSS 10,2).
Bemerkungen fiber den Atombau, 20 pp., [1922] (Bohr MSS 10,3).
Lectures, London and Cambridge, 9 pp., 1922 (Bohr MSS 10,3).
Guthrie lecture, 129 pp., [1922] (Bohr MSS 10, 4).
Die Theorie des Atombaus, 119 pp., 1922 (Bohr MSS 10,5).
Forklaringen af det periodiske system, [The.explanation of the periodic system], 16 pp., 1922 (Bohr MSS 10,6).
Kvanteteoriens anvendelse. [Application of the quantum theory], 5 pp., [1922] (Bohr MSS 10, 6).
Ukomplet manuscript, [Incomplete manuscript], 16 pp., [1922] (Bohr MSS 10,6).
Veröffentlichte Werke, 1 p., [1922] (Bohr MSS 10,6).
Tale ved tildelingen af Nobelprisen, [Speech at the award of the Nobel prize], 2 pp., [1922] (Bohr MSS 10,6).
Memoirs, recollections of the advent of electron spin, 3 pp., 1959 (66,6).

AMALDI: 2 letters 1941-42.
ANDRADE: 11 Dec 23, 8 letters 1948-57.
BACHER: 2 letters 1958-59.
BEDREAG: 11 Sep 24, 6 Feb 35, 16 Mar 35, 2 letters 1943-48.
BENEDICKS: 17 Oct 41.
BERLINER: 9 Jul 23.
BETHE: 10 Jun [32], 7 Aug 33, 10 Aug 33, 9 Jun 34, 2 letters 1936-[39].
BIRGE: 6 letters 1937-55.
BIRTWISTLE: 27 Feb 26, 26 Apr 28 [by Klein], 3 May 28 [by Klein], 23 May 28, 15 Jun-28.
BLACKETT: 6 Sep 30, 2 Sep 33, 7 letters 1936-48.
BLOCH: 23 Jul 31, 15 Jun 32, 22 Jul 32, 7 Sep 32, 21 Nov 32, 27 Dec 32, 12 Apr 33, 17 Feb 34, 13 Nov 34, 4 letters 1937-46.
BORN: 9 pr 23, 2 May 23, 1 Dec 24, 9 Dec 24, 10 Jan 25, 18 Jan 25, 1 Ma 25, 25 Nov 25, 28 Dec 26, 22 Jan 27, 15 Feb 29, 28 letters [1943]-58.
BOTHE: 24 Jan 34, 30 Jan 34, 8 Feb 34, 4 letters 1938.
BRAGG: 25 Sep 34, 4 letters 1939.
BREIT: 18 Jan 34, 2 Jun 34, 27 Oct 34, 3 letters 1938-46.
BRILLOUIN: 28 May 25, 4 Jun 31, 4 May 34, 3 letters 1938-59.
L. DE BROGLIE,: 13 Mar 23, 3 Dec 29, 13 Nov 34, 11 Dec 35, 5 letters 1936-52.
CASIMIR: 17 Aug 29, 7 letters 1946-54.
COCKCROFT: 1 Aug 30, 8 Oct 30, 23 Jul 31, 15 letters 1936-55.
COLBY: 29 Jan 23, 21 Feb 23, 24 May 23, 8 Jun 23.
A. H. COMPTON: 3 letters 1946-54.
COSTER: 24 Nov 24, 25 Nov 24, 10 Dec 24, 18 Feb 25, 5 Sep 30, 6 Sep 30, 15 Mar 35.
COURANT: 18 letters 1944-61.
DARWIN: 4 Mar 24, 7 Jul 26, 24 Nov 26, 29 Aug 27, 23 Nov 27 [by Klein], 26 Mar 28, 9 May 28, 17 Jun 28, 14 Jul 28, 5 Jun 30, 15 Nov 30, 18 Nov 30, 16 Dec 30, 21 Dec 30, 22 Jul 31, 10 Aug 35, 3 letters 1937-45.
DELBRÜCK: 5 Jul 32, 8 Dec 34, 10 Apr 35, 10 Aug 35, 22 Nov 35, 7 Dec 35, 19 letters 1936-62.
DENNISON: 15 May 24, 9 Jun 27, 31 Jan 61.
DIRAC: 27 Feb 28, 24 Mar 28, 24 Nov 29, 5 Dec 29, 23 Dec 29, 29 Aug 30, 14 Nov 32, 22 Nov 33, 2 letters 1936-37.
DUANE: 6 Feb 24, 17 May 24.
EDDINGTON: 19 Feb 24, 1 Mar 24.
EHRENFEST: 23 Feb 23, 10 Jun 25, 2 letters 14 Oct 25, 22 Dec 25, 5 Jan 26, 6 Jan 26, 7 Jan 26, 21 Jan 26, 18 Feb 28, 10 Mar 28, 31 May 28, [Jul 28], 24 Oct 28, 22 Mar 29, 28 Oct 29, 7 Dec 29, 18 Mar [31], 19 May 31, 10 Mar 32, 1 letter (undated).
EINSTEIN: 13 Apr 27, 25 Jun 31, 3 Oct 32, 4 letters 1949-54.
ELSASSER: 2 letters 1959.
FAXÉN: 27 Feb 26,14 May 26, [Apr 27].
FERMI: 13 Nov 31, 29 Jan 32 [by Manneback?],
24 Feb 32, 12 Mar 32, 31 Jan 34, 28 Feb 34, 26 Oct 34, 6 Dec 54.
FOKKER: 20 Apr 25, 27 Jun 30, 24 Jul 31, 11 Aug 34, 13 Jan 49.
FOOTE: 6 Feb 24, 6 May 24, 22 Apr 26.
FOSTER: 31 Mar 26, 7 Jul 26, 15 Jul 27, 3 Aug 27, 21 Jan 35, 23 Mar 35, 4 letters 1947-58.
A. FOWLER: 17 Jan 24, 29 Feb 24, 22 Apr 26.
R. H. FOWLER: 30 Nov 23 [by Kramers], 21 Jan 24, 5 Dec 24, 20 Jan 25, 21 Apr 25, 17 Jun 25, 26 Nov 25, 20 Feb 26, 14 Apr 26, 26 Oct 26, 10 Jun 27, 27 Dec 27, 28 Feb 28, 19 May 28, 3 Aug 28, 13 Oct 28, 14 Dec 28, 21 Dec 28, 14 Feb 29, 2 Apr 29, 26 Aug 30, 20 Nov 31, 30 Jan 32, 17 Feb 32, 28 Oct 32, 17 May 32, 3 Oct 33, 14 Feb 34, 28 Feb 34, 12 Dec 34, 22 Dec 34, 13 Mar 35, 5 Jul 35, 11 Aug 35, 11 Jun 38.
FRANCK: 8 Jan 23, 11 Oct 24, 1 Nov 24, 12 Nov 24, 30 Mar 25, 21 Apr 25, 18 Nov 25, 26 Nov 25, 22 Dec 25, 14 Jan 26, 21 Jul 26, 2 Sep 33, 5 letters 1945-46.
FRENKEL: 3 letters 1936-46.
FRICKE: 9 Sep 25.
FUES: 30 Jan 30.
FUKUDA: 10 Aug 28, 24 Jan 29.
GAMOW: 12 Aug 28, 4 Jan 29, 25 Jan 29, 22 Mar 29, 16 Sep 29, 16 Aug 30, 25 Aug 30, 21 Jan 33, 27 Jan 34, 11 Aug 34, 28 Sep 34, 10 letters 1936-61.
GEIGER: 21 Apr 25, 9 Dec 26, 29 Jun 29.
GOUDSMIT: Apr 26, 16 Aug 27, 3 Jun 30, 18 Jan 55.
GROTRIAN: 19 Feb 23, 7 Jun 32.
HAAS: 21 Nov 27, [by Klein], [1960].
HABER: 16 Jan 32.
HANSEN: 22 Jul 32, 3 letters 1936-37.
HARTREE: 27 Mar 28, 2 letters 5 Jan 29, 5 Jun 30, 17 Jun 30, 20 May 37.
HEISENBERG: 31 Jan 24, 9 Feb 24, 16 Feb 24, 7 Mar 24, 18 Jun 24, 5 Jul 24, 22 Aug 24, 1 Sep 24, 26 Nov 24 [by Born], 2 Jan 25, 17 Jan 25, 28 Feb 25 [by Pauli], 18 Apr 25, 10 May 25, 19 Jun 25, 4 Sep [25], 18 Nov 25, 26 Nov 25, 10 Apr 26, [Apr 26], 4 Aug 26, 15 Jul 27, 24 Aug 27, 24 Mar 28, 10 May 28, 14 Aug 28, 5 Sep 28, (Dec 28], 25 Feb 29, 10 Jan 30, 20 Jan 30, 18 Mar 30, 2 May 30, 4 Jun 30, 13 Jun 30, 4 Jul 30, 5 Aug 30, 19 Aug 30, 19 Nov 30, 8 Dec 30, 25 Dec 30, 30 Jan 31, 18 Feb 31, 13 Mar 31, 7 May 31, 23 Dec 31, 24 Feb 32, 21 Mar 32, 22 Mar 32, 27 Jun 32, 7 Jul 32, 1 Aug 32, 2 Aug 32, 28 Oct 32, 13 Mar 33, 19 May 33, 17 Aug 33, 22 Nov 33, 3 Mar 34, 7 Mar 34, 20 Apr 34, 30 Jun 34, 8 Sep 34Y 11 Oct 34, 28 Jan 35, 9 Mar 35, 16 Mar 35, 9 May 35, 22 May 35, 2 Jul 35, 10 Aug 35, 10 Sep 35, 15 Sep 35, 1 Oct 35, 9 Oct 35, 31 letters 1936-61.
HEITLER: 6 letters 1936-47.
G. HERTZ: 30 Nov 32, 8 Dec 33, 18 Dec 33, 17 Jan 34, 21 Feb 34, 2 letters 1938.
HERZFELD: 18 Aug 23.
DE HEVESY: 20 Sep 23, 30 May 28, [Apr] 29, 15 Jun 32, 5 Sep 32, 8 Nov 33, 15 Nov [38], 8 letters 1945-58.
HILBERT: 8 Sep 23.
HOLTSMARK: 7 Apr 23, 22 Aug 24, 10 Nov 24, 27 Mar 28, 8 letters 1937-43.
HORI: 19 May 26, 15 Jul 27, 3 Aug 37.
HOUSTON: 4 Jun 31, 18 Jun 31, 2 Jun 35, 13 Jul 35, 4 letters 1936-58.
HOYT: 16 Feb 24, 26 Sep 24, 16 Jan 25, 17 Feb 25, 28 Apr 28.
HUGHES: 30 May 24.
HULTHÉN: 8 Apr 27,, 9 Nov 28, 11 Dec 29, 23 Dec 29, 7 Mar 30, 5 letters 1938-45.
HUND: 3 Nov 25, 6 Mar 26, 28 Apr 27, 21 May 27, 6 Mar 29, 3 letters 1950-62.
HYLLERAAS: 17 Sep 29, 29 May 31, 16 Sep 31, 7 Mar 33, 8 letters 1936-49.
JOFFÉ: 25 Oct 28, 27 Dec 28, 6 May 29, 20 Apr 31, 10 Mar 34, 26 Mar 34, 13 Apr 34, 24 Sep 34, 23 Dec 40.
F. JOLIOT: 30 Apr 32, 19 May 32, 3 letters 1940-46.
1. JOLIOT-CURIE: 10 Jun 31, 30 Apr 32, 19 May 32, 22 Sep 34, 3 Dec 35.
JORDAN: 25 Feb 27, 3 Dec 27, 14 May 28, 17 Aug 28, 25 Jan 30, 5 Jun 31, 14 Jun 31, 22 Jun 31, 25 Mar 32, 27 Dec 32, 30 Jun 34, 27 Nov 35.
KAPITZA: 15 Mar 33, 9 Feb 34, 9 letters 1937-46.
KAYSER: 13 Mar 23.
KELLNER: 26 Mar 30, 4 Jul 30, 24 Jul 30.
KENNARD: 19 Jun [27], 25 Aug 27.
KLEIN: 1 May 23, 31 Jan 24, 16 Jan 25, 22 Jun 25, 23 Sep 25, 19 Nov 25, 23 Dec 25, 7 May 26, 14 Jul 28, 6 Feb 29, 12 Feb 29, 5 Aug 29, 20 May 31, 19 Feb 32, 24 Feb 32, 18 May 32, 31 May 32, 13 Jun 32, 28 Jun 32, 22 Jul 32, 22 Aug 32, 28 Oct 32, 27 Dec 32, 19 Jan 33, 7 Apr 33, 18 Dec 33, 1 Feb 34, 19 Feb 34, 3 Mar 34, 15 Dec 34, 10 Jul 35, 9 Aug 35, 34 letters 1936-60.
KONEN: 14 Feb 23, 13 Mar 23, 4 Apr 23, 7 Apr 23, 12 Apr 23, 17 Apr 23, 11 Aug 23.
KOPFERMANN: 18 Feb 32, 22 Feb 33, 2 letters 21 Mar 33, 28 Apr 33, 17 Nov 33, 17 Jan 34, 2 letters 22 Jun 35, 9 letters 1948-55.
KOSSEL: 9 Jun 29, 29 Jun 29, 9 Aug 29, 22 Aug 29.
KRAMERS: 4 Feb 24, 23 Sep 24, 11 Nov 26, 17 Feb 28, 27 Feb 28, 25 Feb 29, 25 Apr 29, 30 Nov 29, 7 Dec 29, 23 Dec 29, 17 Mar 30, 5 Jun 30, 16 Jan 32, 23 Dec 33, 25 Oct 34, 10 Jul 35, 28 letters 1936-49.
KRONIG: 24 Nov 24, 26 Mar 26, 28 Oct 26, 11 Nov 26, 2 letters 18 Mar 27, 17 Oct 32, 27 Dec 32, 3 letters 1941-53.
KUDAR: 28 Jan 30,19 Feb 31, 18 Mar 31, 1 Apr 31, 16 Apr 31, 24 Dec 31.
KUHN: 11 Aug 23, 25 Jan 24, [Apr 25], 10 May 26, 11 May 26, 18 May 26, 6 Jul 26, 22 Jun 31, 18 Jan 33, 28 Mar 33.
LADENBURG: 17 May 23, 2 Jun 30, 7 Jun 32, 13 May 49.
LANDAU: 27 Aug 30, 16 Feb 31, 6 Dec 33, 8 letters 1936-62.
VON LAUE: 9 letters 1940-52.
LEWIS: 9 Apr 23, 25 Apr 35.
LINDSAY: 2 letters 1937-54.
LORENTZ: 3 Mar 24, 2 Jul 25, 7 Sep 25, 24 Jun 26.
LYMAN: 25 May 23.
MANNEBACK: 1 Apr 31, 10 Jun 31, 5 Mar 46.
MARSDEN: 6 letters 1960-62.
MCLENNAN: 14 Mar 23, 6 Jul 23, [Jul 23], 10 Oct 23, 11 Jan 24, 16 Feb 24.
MEGGERS: 11 Sep 25, 23 Oct 25, 30 May 28,
MEITNER: 5 letters 1940-55.
MIE: 13 Dec 24.
MILLIKAN: 26 May 24, [Nov 27], 21 Nov 27, 23 Aug 29, 2 May 30, 4 Aug 30, 27 Dec 32, 29 Jun 34, 22 Sep 34, [Oct 34], [1934], 4 letters 1936-46.
MØLLER: 14 Jun 28, 19 Feb 32, 28 Jun 32, 3 Jul 35, 4 letters 1937-49.
MOTT: 1 Mar 29, 1 Oct 29, 18 Oct 29, 1 Apr 30, 11 Aug 35, 11 letters 1937-58.
NAGAOKA: 22 May 31.
VON NEUMANN: 3 letters 1938-57.
NISHINA: 29 Mar 23, 27 Aug 27, 6 Sep 27, 26 Oct 28, 26 Dec 29, 4 Aug 30, 22 May 31, 26 Jan 34, 13 Sep 34, 27 Nov 34, 12 letters 1936-49.
NORDHEIM: 19 May 28, 29 Oct 28, 7 Feb 29, 8 Feb 34, 25 May 50.
OLDENBERG: 23 Aug 26, 10 Sep 26.
OPPENHEIMER: 36 letters 1937-58.
ORNSTEIN: 5 Jul 24.
OSEEN: 23 Feb 23, 8 Mar 24, 29 Jan 26, 2 letters 5 Nov 28, 7 Mar 30, 26 Jan 32, 23 Dec 34, Apr 35, 5 Jul 35
PASCHEN: 23 Oct 19, 8 Nov 19.
PAULI: 16 Feb 24, 24 Mar 24, 11 Dec 24, 22 Dec 24, 10 Jan 25, 2 Nov 25, 13 Nov 25, 25 Nov 25, 5 Dec 25, 24 Dec 25, 20 Feb 26, 3 Mar 26, 9 Mar 26, 31 Mar 26, 25 Mar 27, 15 Jul 27, 13 Aug 27, 17 Aug 27, 2 Sep 27, 11 Oct 27, 8 Jan 28, 15 Jan 28, 27 Feb 28, 13 Mar 28, 14 May 28, 7 Aug 28, 14 Aug 28, 8 Jan 29, 1 Jul 29, 31 Jul 29, 26 Dec 29, 21 Mar 31, 27 Apr 31, 8 Dec 31, 25 Jan 33, 15 Feb 34, 24 Feb 34, 3 Mar 34, 7 Mar 34, 15 Mar 34, 38 letters 1945-55.
PAULING: 3 Jun 30, 4 letters 1938-47.
PEIERLS: 16 Feb 31, 15 letters 1938-50
PERRIN: [Nov 26], Dec 26.
RABI: 2 letters 1939-52.
RAMAN: 18 May 23, 18 Sep 29, [18 Dec 30], 5 Sep 32.
RAMSAUER: 11 Oct 28, 25 Oct 28.
RASETTI: 2 letters 1937-39.
RAUSCH VON TRAUBENBERG: 20 Apr 34.
RAY: 11 Sep 23,12 May 24,3 Sep 24,20 Nov 24, 23 Jun 25, 23 Jun 25, 31 Oct 25, 22 Jan 27, 9 Feb 27.
ROSENFELD: 2 letters 19 May 28, 2 Mar 29, 16 Aug 29, 42 letters 1940-62.
ROSSELAND: 27 Feb 23, 19 Feb 24, 6 Jan 26, 2 Sep 26, 6 May 27, 16 Mar 28, 21 Jun 28, 31 Jan 30, 16 Dec 30, 21 Jan 31, 2 letters 21 Feb 31, 9 May 31, 17 Feb 32, 25 Feb 32, 19 Mar 32, 8 Feb 34, 5 letters 1937-59.
RUBINOWICZ: 17 Jul 61.
RUTHERFORD: 17 Jan 23, 9 Feb 23, 10 Feb 23, 20 Feb 23, 24 Feb 23, 21 Mar 23, 24 Mar 23, 9 Apr 23, 28 May 23, 9 Jul 23, 9 Jan 24, 15 Feb 24, 24 Mar 24, 10 May 24, 12 Jul 24, 18 Apr 25, 28 Apr 25, 27 Jan 26, 15 May 26, 13 Nov 29, 3 Feb 30, 26 Apr 30, 3 Jun 30, 21 Jan 31, 26 Aug 31, 14 Sep 31, 2 May 32, 16 Jun 32, 27 Aug 32, 3 Sep 32, 4 Nov 32, 8 Nov 33, 19 Dec 33, 20 Dec 33, 1 Feb 34, 9 May 35, 3 Jun 35, 2 letters 1936-37.
SAHA: 18 Feb 27 [by Klein].
SCHEEL: 10 Jan 23, 17 Jan 23, 23 Jan 23, 21 Mar 23, 8 Dec 23, 21 Jan 24, 16 Feb 24, 13 Mar 24, 25 Apr 24, 10 Sep 24, 28 Nov 24, 16 Feb 25, 28 Mar 25, 8 Apr 25, 9 May 25, 17 Jun 25, 13 Jul 25, 24 Jul 25, 15 Aug 25, 26 Apr 26, 4 Jun 26, 6 Jul 26, 15 Nov 26, 4 Dec 26, 15 Jul 27, 25 Aug 27, 25 Apr 29, 30 Nov 29.
SCHERRER: 2 letters 1939-41.
SCHRÖDINGER: 11 Sep 26, 2 Dec 26, 26 Apr 28, 23 May 28, 21 Jan 29, 13 Sep 30, 10 Dec 30 [by Klein], 8 May 31, 3 letters 1947-52.
SEELIGER: 26 Feb 24, 2 letters 1948.
SENFTLEBEN: 4 Feb 43.
SIEGBAHN: 18 Jan 23, 5 Apr 23, 21 Sep 23, 17 Jun 24, 11 Jun 30, 1 Feb 35, 16 letters 1940-46.
SLATER: 10 Jan 25, 28 Jan 26, 2 letters 1934-46.
SOMMERFELD: 21 Nov 24, 3 Feb 32, 5 letters 1938-48.
STERN: 5 letters 1947.
SUGIURA: 8 Feb 61.
TAKAMINE: 20 Sep 24, 18 Feb 25, 20 Feb 2.5, 3 letters 1959-61.
THIRRING: 16 Mar 54.
THOMAS: 22 Sep 25, 21 Jul 26, 11 Sep 26, 25 Jan 36
G. P. THOMSON: 26 Jul 30, 17 Dec 30, 30 Apr 35, 21 Jun 35, 9 Aug 35, 7 letters [1939]-56.
TOLMAN: 21 Jun 34, 4 letters 1938-46.
TRUMPY: 29 Jan 29, 2 Feb 29, 10 Mar 31, 19 Nov 31, 9 May 32, 13 Jul 34, 8 letters 1937-46.
TURNER: 1 Jul 24, 2 letters 1956-58.
UREY: 26 May 24, 24 Dec 24, [1925], 28 Jan 26, 10 Jul 26, 25 Nov 26, 4 Jun 30, 4 letters 1947.
VAN VLECK: 15 Nov 28.
VEGARD: 4 Feb 41.
WALLER: 20 Feb 28, 22 Feb 29, 15 Mar 29, 7 Jun 47.
WEISSKOPF: 22 Dec 31, 1 Aug 32, 12 Apr 33, 10 Nov 33, 5 Dec 33, 20 Dec 33, 11 letters 1936-61.
WEIZSÄCKER: 21 letters 1941-60.
WERNER: 22 Jan 24, 17 Nov 24, 26 Feb 25, 13 letters 1938-46.
WHIDDINGTON: 18 Dec 58.
ZEEMAN: 1 Oct 26.
See: AMALDI, ANDRADE, BACHER, BECKER, BEDREAG, BENEDICKS, BERLINER, BETIIE, BIRGE, BIRTWISTLE, BJERRUM, BLACKETT, BLOCH, BORN, BOT]IB, BRAGG, BREIT, BRILLOUIN, L. DE BROGLIE, J. M. BURGERS, CASIMIR, COCKCROFT, COLBY, A. H. COMPTON, K. T. COMPTON, CONDON, COSTER, COURANT, DARWIN, DAVISSON, DELBRÜCK, DENNISON, DIRAC, DUANE, EDDINGTON, EHRENFEST, EINSTEIN, ELASSER, ]EPSTEIN, FAJANS, FAXPN, FERMI, FOKKER, FOOTE, FOSTFR, A. FOWLER, R. H. FOWLER, FRANCK, FREI.TKEL, FRICKE, FUES, FUKUDA, GAMOW, GEIGER, GOUDSMIT, GROTRIAN, HAAS, HABER, HANSEN, HARTREE, HEISENBERG, HEITLER, G. HERTZ, HERZFELD, DE HEVESY, HILBERT, HOLTSMARK, HORI, HOUSTON, HOYT, HUGHES, HULTHÉN, HUND, HYLLERAAS, JOFFÉ, F. JOLIOT, 1. JOLIOT-CURIE, JORDAN, KAPITZA, KAUFMANN, KAYSER, KELLNER, KEMBLE, KENNARD, KIMURA, KLEIN, KONEN, KOPFERMANN, KOSSEL, KRAMERS, KRONIG, KUDAR, KUHN, LADENBURG, LANDAU, VON LAUÉ, LENZ, LEWIS, LINDSAY, LORENTZ, LYMAN, MANNEBACK, MARSDEN, MCLENNAN, MEGGERS, MEITNER, MIE, MILLIKAN, MØLLIER, MOTT, NAGAOKA, NEUMANN, NIESSEN, NISHINA, NORDHEIM, OLDENBERG, OPPENHEIMER, ORNSTEIN, OSEEN, PASCHEN, PAULI, PAULING, PEIERLS, PERRIN, RABI, RAMAN, RAMSAUER, RASETTI, RAUSCH VON TRAUBENBERG, ROSENFELD, ROSSELAND, RUBINOWICZ, RUSSELL, RUTHERFORD, SAHA, SAUNDERS, SCHEEL, SCHERRER, SCHRÖDINGER, SEELIGER, SENFTLEBEN, SIEGBAHN, SLATER, SOMMERFELD, STERN, SUGIURA, TAKAMINE, THIRRING, THOMAS, G. P. THOMSON, J. J. THOMSON, TOLMAN, TRUMPY, TURNER, UREY, VEGARD, VAN DER WAERDEN, WALLER, WEISSKOPP, VON WEIZSÄKER, WERNER, WHIDDINGTON, WIGNER, W. WILSON, WOOD, ZEEMAN
Of the following letters, those dated before 1923 are microfilmed on BSC, 1-8. (See Chapter IV).
4 Letters to N. Arley, 1942-48; 4 to S. Arrhenius, 1920-22; to F. W. Aston, [1945]; 8 to Auer von Welsbach, 1922-25; 5 to P. Auger, [1925]-49; to T. Aurén, 1917; 2 to Aa. Berlème, 1918-[45]; 5 to H. J. Bhabha, 1936-49; 3 to H. F. Biggs, 1914-23; 5 to T. Bjerge, 1934-41; to V. Bjerknes, 1920-45; 20 to W. L. Bragg, 1921-57; 2 to J. N. Bronsted, 1913-29; 8 to J. Boggild, 1937-54; 16 to J. Chadwick, 1930-[61]; 5 to T. S. Chang, 1938-46; 2 to S. Chapman, 1928-29; to C. Christiansen, 1915; 7 to J. G. Crowther, 1932-46; to M. Curie, 1934; to C. Cuthbertson, 1913; 3 to L. M. Dennis, 1922-23; to G. B. Deodhar, 1931; 3 to F. G. Donnan, 1933-38; to J. W. M. DuMond, 1961; 2 to P. Ehrenfest, Jr., 1935-38; 8 to F. Ehrenhaft, 1923-34; 8 to C. D. Ellis, 1922-37; to H. von Euler, 1920; 4 to A. S. Eve, 1926-37; 8 to V. Fock, 1936-61; to R. F. Francis, [1916]; 9 to Ph. Frank, 1933-62; 10 to O. R. Frisch, 1939-58; to Fürth, 1933; 2 to L. C. Glaser, 1921-22; 2 to V. M. Goldschmidt, 1923-24; to F. S. Goucher, [1919]; 4 to O. Hahn, 1933-59; 2 to H. Halban, 1936-45; to G. R. Harrison, 1922; to H. R. Hassé, [1943]; to G. A. Hemsalech, [1919]; to G. H. Henderson, 1922; to V. Henri, 1925; to V. Henriques, 1916; 3 to E. Hertzsprung, 1923-29; to Fr. Hoffman, 1921; 10 to H. Holst, 1922-44; 3 to L. Hopf, 1933; to W. Hume-Rothery, 1928; 4 to H. Høffding, 1922-33; to D. Iwanenko, 1934; 3 to J. C. Jacobsen, 1921-41; 4 to Fr Johannsen, 1907; to F. Kalckar, 1936; 4 to H. M. Kalckar, 1945-62; to Fr. Knauer, 1929; 5 to M. Knudsen, 1912-20; to F. Kohlrausch, 1927; 4 to A. F. Kovarik, 1924-31; 6 to C. C. Lauritsen, 1936-49; 12 to T. Lauritsen, 1939-47; 7 to E. 0. Lawrence, 1937-58; to E. Lederer, 1911; 3 to E. J. Lennard-Jones; 2 to G. H. Livens, 1915 and [undated]; 2 to W. Makower, 1920-[45]; to A. W. Marke, 1914; 11 to A. Mercier, 1937-57; 5 to K Meyer, 1931-39; 2 to S. Meyer, 1923-24; 2 to O. Meyerhof, 1936; 2 to A. A. Michelson, 1924; 2 to H. Miers, 1916-24; to P. B. Moon, 1930; 2 to Mrozowski, 1935-36; correspondence with K. A. Nissen, 1916-61; 3 to M. L. Oliphant, 1936-48; 3 to F. Perrin, 1938-47; 17 to M. Pihl, 1931-48; 5 to M. S. Plesset, 1933-36; 6 to A. Proca, 1934-56; 4 to K. Prytz, 1920-27; 4 to Rasmussen, 1933-39; to R. E. H. Rasmussen, 1945; 3 to M. Reeks, 1919-22; to M. Reinganum, 1911; 2 to D. Riabouchinsky, 1919-20; to T. W. Richards, 1923, 11 to J. Rud Nielsen, 1922-37; to G. Rudorf, 1913; 12 to B. Russell, 1935-62; to G. von Salis, 1924; to 1. Fr. Schroeter, 1925; 3 to E. Segré, 1946-47; 5 to L. Simons, 1938-49; to S. Smith, 1937; to J. Solomon, 1931; to G. W. Stewart, 1922; to H. Stocker, 1914; 8 to B. Strømgren, 1923-61; 5 to E. Strømgren, 1923-47; 4 to C. Störmer, 1922-[27]; to L. Szilard, 1936; 4 to S. Saeland, 1930-40; 3 to G. Tamm, 1934-36; to F. Tank, 1919; 8 to E. Teller, 193058; 5 to A. D. Udden, 1921-26; to A. van Urk, 1922; 4 to 0. Veblen, 1945-47; to G. Voghera, 1924; 9 to S. H. Weber, 1916-45; to F. Weigert, [1943]; to J. West, 1924; 44 to J. A. Wheeler, 1934-61; 17 to E. J. Williams, 1933-38; 2 to W. E. Williams, 1920-24; 2 to F. Zernike, 1924.

RUTHERFORD COLLECTION, Cavendish Laboratory, Cambridge, England. Letters to Rutherford, 6 Jul 12 to 9 Mar 36. See: Rutherford.
ROYAL SOCIETY LIBRARY, London, England. Letter, 1921.
DEUTSCHE STAATSBIBLIOTHEK, Berlin. Material at present held at the Westdeutschen Bibliothek, Marburg/Lahn, Germany [BRD]. Letter to Planck, 8 Sep 23. (Darmstaedter Coll., Fic* 1911).
RIJKSMUSEUM VOOR DE GESCHIEDENIS DER NATUURWETENSCHAPPEN, Leiden, The Netherlands. c. 20 Letters to Ehrenfest, 1922-32. See: Ehrenfest.
LIBRARY OF THE SWEDISH ACADEMY, Stockholm, Sweden. Letters to Oseen, 6 Sep 11, 4 Dec 11, 17 Oct 13, 1 Jan 14, 10 Mar 14, 18 Mar 14, 8 Apr 14, 28 Sep 14, 15 May 20, 20 Mar 28, 7 Mar 30.
UNIVERSITETSBIBLIOTEKET, Uppsala, Sweden. Letter to Manne Siegbahn, 1923. (Waller Coll.)
PAULI COLLECTION, Zurich, Switzerland. Letters to Pauli, 3 Jul 22, 16 Feb 24, 11 Dec 24, 22 Dec 24, 10 Jan 25, 25 Nov 25, 24 Dec 25, 20 Feb 26, 3 Mar 26, 9 Mar 26, 25 Mar 27, 15 Jul 27, 17 Aug 27, 2 Sep 27 8 Jan 28, 15 Jan 28, 13 Mar 28, 14 May 28, 21 Mar 31, 27 Apr 31, 8 Dec 31, 25 Jan 33, 15 Feb 34, 24 Feb 34, 3 Mar 34, 7 Mar 34, 15 Mar 34, 7 letters 1950-55. See: Pauli.
LIBRARY OF CONGRESS, Washington, D.C. Correspondence with Veblen, 1928-47.
EINSTEIN COLLECTION, Princeton, N.J. Correspondence with Einstein, 4 items 1920-24, 6 items 1927-54.
AMERICAN INSTITUTE OF PHYSICS, New York, N.Y. Letters to Gordon Fulcher, 13 Oct 23, 2 Nov 23, 15 Nov 23.

1901-04, U. Breslau; except the summer semesters 1902, U. Heidelberg, and 1903, U. Zurich.
1904-06, U. Göttingen: 1906, Dr. phil. with D. Hilbert.
1906-07, U. Cambridge, with J. J. Thomson.
1907-08, U. Breslau, with O. Lummer and E. Pringsheim.
1908-14, U. Göttingen, Priv.-Doz.
1914-19, U. Berlin, a. o. Prof.
1919-21, U. Frankfurt-am-Main, o. Prof.
1921-33, U. Göttingen, o. Prof. and Dir., Inst. Theor. Phys.
1933-36, U. Cambridge, Lect. 1936-52, U. Edinburgh, Prof.
Misc.: 1912, U. Chicago, Guest Lect.
1925-26, Mass. Inst. Techn., Guest Lect.
1932, Techn-Hochsch. Berlin, Guest Lect.
1935-36, Indian Inst. Science, Bangalore, India, Guest Lect.

Three sessions, 51 pp. transcript. Also
Interviews in June 1960 conducted, by P. P. Ewald.

BOHR: 12 May 18 (BSC 1,1).
DARWIN: 7 Apr 27 (36,1).
GERLACH: 1 1 May 21, 13 May 21, 16 May 21, 23 May 21, 10 Oct 21, 21 Nov 21, 5 Dec 21, 12 Dec 21, 29 Dec 21, 14 Jan 22, 15 Apr 22, 31 Oct 22, 17 Nov 22, 1 Apr 23, 19 May 23, 27 Dec 29, (19,1).
KEMBLE: 9 Mar 26 (51,1).
KRAMERS: 15 Feb 25, 6 May 25, 29 Sep 25, (8,2); 4 Dec 35, 5 letters 1936-39, (9,5); 2 letters 1945-[51], (11,3).
LANDÉ: 21 Dec 18, 25 Dec 18, 2 Jan 19, 3 Jan 19, 27 Jan 19, 12 Feb 19, 21 Mar 19, 1 Apr 19, 6 Jun 19, 11 Jul 19, 24 Aug 19, 2 Sep 19, 14 Jun 21, 29 May 22, 31 Oct 22, 26 Jan 24, 27 Feb 24, 7 Mar 24, 14 Apr 24, 15 Jul 24, (4,2).
SCHRÖDINGER: 6 Nov 26, 16 May 27, (41,7); 32 letters 1933-57 (37,3).
SOMMERFELD: 15 Jun 26 (29,11).
VAN VLECK: 24 Oct 24, 25 Nov 25, 14 Dec 25, 13 Jan 26, 25 Feb 26, (49,3).
WENTZEL: 13 Dec 26, 15 Dec 26, (66,3).

See: HEISENBERG, KEMBLE, KRAMERS, SCHR8DINGER, SOMMERFELD, VAN VLECK.

Lecture course, "Kinetische Gastheorie," notes taken by Maria Mayer, 128 pp., Göttingen, 1928 (2).
Memoirs, "Professor Max Born's Recollections: Excerpts from Chapters X, XII, and XVI," 11 pp. (66,7).
Memoirs, "XIX. Quantum Mechanics," 18 pp. (66,7).
Memoirs, "Second Part: Tempestuous Years. 1. The Heroic Age of Theoretical Physics," 20 pp. (66,7).

BOHR COLLECTION, Copenhagen, Denmark. Letters to Bohr, 4 Mar 23, 17 Apr 23, 5 May 23, 16 Apr 24, 6 Dec 24, 15 Dec 24, f5 Jan 25, 17 Feb 25, 18 Feb 25, 3 Mar 25, 24 Apr 25, 25 Apr 25, 10 Oct 25, [1925], 18 Dec 26, 4 Jan 27, 11 Feb 29, 16 Feb 29, 5 Mar 29, 50 letters 1943-61. Letter to F. Simon, 7 Aug 45. Statement by Born regarding P. Hertz, 18 Feb 35. See: Bohr.
RUTHERFORD COLLECTION, Cavendish Laboratory, Cambridge, England. Letters to Rutherford, 21 Aug 31, 26 Jan 36 to 26 Sep 36. See: Rutherford.
BEDFORD COLLEGE LIBRARY, University of London, London, England. 2 Letters to W. Wilson 1950-52.
MATHFMATISCHES INSTITUT, University of Göttingen, Göttingen, Germany [BRD]. Ausarbeitungen of lecture courses, "Kinetische Theorie der Materie," winter, 1922/23; "Quantenmechanik," winter, 1928/29; "Quantentheorie," summer, 1930.
RIJKSMUSEUM VOOR DE GESCHIEDENIS DER NATUURWETENSCHAPPEN, Leiden, The Netherlands. c. 20 Letters to Ehrenfest with many copies of answers, 1927-32.
LIBRARY OF THE SWEDISH ACADEMY, Stockholm, Sweden. Letters to Oseen, 15 May 15, 25 Feb 29, 28 May 31, 16 Jun 36.
BIBLIOTHEK DER EIDGENÖSSISCHEN TECHNISCHEN HOCHSCHULE, Zurich, Switzerland. Letters to Weyl, 3 Oct 25, 1 June 30, 6 Oct 30.
PAULI COLLECTION, Zurich, Switzerland. Letter to Pauli, 23 Dec 19. See: Pauli.
BURNDY LIBRARY, Norwalk, Conn. Manuscript in Weiner Collection.
LIBRARY OF CONGRESS, Washington, D.C. Correspondence with Veblen, 1940.
UNIVERSITY OF MARYLAND, College Park, Md. Born's library plus a collection of reprints, some of them annotated.
EINSTEIN COLLECTION, Princeton, N.J. Correspondence with Einstein, c. 75 items 1916-54.
DUKE UNIVERSITY ARCHIVES, Durham, N.C. 20 Letters to London, 1929-37. See: London.

Professor Born has said that he left many papers in Göttingen when he went to England in 1933. These papers have not as yet been located.

1908-12, U. Berlin.
1913-30, Phys.-Techn. Reichsanstalt: 1913-20, Asst.; 1920-27, Member, Board of Governors; 1927-30, Research.
1914, U. Berlin, Dr. phil. with M. Planck. 1925-30, U. Berlin: 1925-29, Priv.-Doz.; 1929-30, a. o. Prof.
1930-32, U. Giessen, o. Prof.
1932-46, U. Heidelberg, o. Prof. and Dir., Phys. and Radiological Inst.
1934-57, Dir, Inst. f. Phys., K.W. Inst. f. med. Forsch.

BOHR COLLECTION, Copenhagen, Denmark. Letters to Bohr, 12 Jan 34, 4 Feb 34, 5 letters 1937-38. See: Bohr.
EINSTEIN COLLECTION, Princeton, N.J. Correspondence with Einstein, 2 items 1921-30.

1918-25, New York U. and Harvard U.
1925-27, Lehigh U., Instr.
1926, Harvard U., Ph.D. with E. C. Kemble
192740, U. Illinois: 1927-37, Assoc.; 1937-40, Asst. Prof.
Letters to
KEMBLE:: 5 Jul 24, 3 Nov 25, 11 Nov 25, 18 Nov 25, 25 Nov 25, 30 Nov 25, 2 Dec 25, 8 Dec 25, 14 Dec 25, 21 Dec 25, [Dec] 25, 23 Feb 26, 24 Feb 26, 1 Mar [26], 1 Apr 26, 10 Apr 26, 3 letters [Dec 26], 21 Aug 27, 16 Oct 27, 16 Feb 28, 3 Jul 28, 8 Mar 28, 1 letter [undated], (51,2).
Letters from
See: KEMBLE.

1881-85, U. Cambridge.
1885-1909, U. Adelaide, Australia, Prof.
1909-15, U. Leeds, Prof.
1915-42, U. London, Prof.
1923-42, Dir., Royal Institution of Great Britain and Davy-Faraday Res. Lab., London.

BOHR: 29 Mar 20 (BSC 1,3).
SOMMERFFLD: 7 Feb [11], 17 May [11], 7 Jul [11], (29,12).

BOHR COLLECTION, Copenhagen, Denmark. 3 Letters to Bohr, 1938-39. See: Bohr.
RUTHERFORD COLLECTION, Cavendish Laboratory, Cambridge, England. Letters to Rutherford, 31 Aug 04 to 4 May 33. See: Rutherford.
BEDFORD COLLEGE LIBRARY, University of London, London, England. Letters to W. Wilson, 19 Jun [??], 4 Jun 23.
ROYAL SOCIETY LIBRARY, London, England. 15 letters, 1907-31.
DEUTSCHE STAATSBIBLIOTHEK, Berlin. Material at present held at the Westdeutschen Bibliothek, Marburg/Lahn, Germany [BRD], 2 Letters to O. Hahn, 1908; 3 to Dr. Iklé, 1913. (Darmstaedter Coll., F2c 1912).
EINSTEIN COLLECTION, Princeton, N.J. Correspondence with Einstein, 2 items 1931.

1915-21, Johns Hopkins U.: 1921, Ph.D. with J. S. Ames; except 1920, U.S. Bureau of Standards, Assoc. Phys.
1921-22, U. Leiden, Nat. Res. Fel.
1922-23, Harvard U., Nat. Res. Fel.
1923-24, U. Minnesota, Asst. Prof.
1924-44, Dept. of Terrestrial Magnetism, Carnegie Institution, Washington: 1924-29, Math. physicist;
1929-44, Res. Assoc.
1929-34, New York U., Prof. 1934-47, U. Wisconsin, Prof.

GOUDSMIT: 14 Sep 22 (60,1); 2 Jun 26 (60, 7); 27 Jun 30 (64,4); 13 Jul 30, 16 Sep 30, (64, 5); 30 Oct 30, 13 Nov 30, 17 Nov 30, 24 Nov 30, (64,6); 19 Feb 31 (65,1); 9 Apr 31 (65,2); 25 May 31 (65,3); [c. Mar 32] (65,6); 9 Apr 32 (65,7).
KRAMERS: 26 Sep 24 (8,2).
SCHRÖDINGER: 17 Feb 27 (41,7).
SOMMERFELD: 2 Jun 30 (29,12).
VAN VLECK: 25 Ian 26, 1 Apr 29, (49,3).

See: GOUDSMIT, KEMBLE, VAN VLECK.

BOHR COLLECTION, Copenhagen, Denmark. Letters to Bohr, 26 Dec 33, 4 Mar 34, 7 May 34, 9 Dec 34, 22 Mar 35, 7 letters 1938-54. See: Bohr.
EINSTEIN COLLECTION, Princeton, N.J. Correspondence with Einstein, 3 items 1922-35.

1908-12, École Norm. Supér., Paris: 1911-12, with J. Perrin.
1912-13, U. Munich, with A. Sommerfeld.
1913-14, U. Paris.
1914-19, Milit. Serv.
1919-20, U. Paris: 1920, Dr. ès sci. with P. Langevin.
1923-28, Collège de France, Assoc. Dir., Phys. Lab.
1928-32, Inst. Henri Poincaré, Paris, Prof.
1932-39, Collège de France, Prof.

Two sessions, 24 pp. transcript.

BOHR: 29 Apr 21 (BSC 1,1).
GOUDSMIT: 1 Jul 22 (60,1); 2 letters 15 Mar 29, 23 Mar 29, 28 Mar 29, (63,2); 12 Apr 29 (63,3); 30 Jun 29, [1929], (63,5); [Sep 29] (63,6); 19 Jan 31 (65,1); 30 May 31 (65,3); 3 Nov 31, 29.Dec 31, (65,5); 21 Dec 32 (65,8).
SCHRÖDlNGER: 3 letters May-Aug 56, (37,4).
SOMMERFELD: 28 Nov 34, 31 Dec 35, (29,12).
VAN VLECK: 20 Mar 32 (49,3).

See: GOUDSMIT, SOMMERFELD.

BOHR COLLECTION, Copenhagen, Denmark. 4 Letters to Bohr, 19 May 25, 1 Jun 31, 16 Dec 32, 27 Apr 34; 13 letters 1937-59. See: Bohr.
LIBRARY OF THE SWEDISH ACADEMY, Stockholm,
Sweden. 2 Letters to Oseen, 1937-38.
BIBLIOTHEK DER EIDGENÖSSISCHEN TECHINISCHEN HOCHSCHULE, Zurich, Switzerland. Letter to Weyl, 14 Dec 30.
EINSTEIN COLLECTION, Princeton, N.J. Correspondence with Einstein, 3 items 1926-29.
AMERICAN INSTITUTE OF PHYSICS, New York, N.Y. Autobiographical memoir.
DUKE UNIVERSITY ARCHIVES, Durham, N.C. Letters to London, 17 Nov 31, 24 Jan 32, 1 Nov 45. See: London.

1909-13, U. Paris.
1913-19, Milit. Serv.
1920-27, U. Paris: 1924, Dr. ès sci. with P. Langevin; 1926-27, Lect.
1928-33, Inst. Henri Poincaré, Paris: 1928-31, Chargé d'enseignement; 1931-33, Maître de Conférences.
1933 to date, U. Paris, Prof.

Two sessions, 24 pp. transcript.
One session with René Lucas, Prof. at the Sorbonne, 13 pp. transcript.
One session with Jean Ulmo of the École Polytechnique, 15 pp. transcript.

HEISENBERG: 16 Dec 31 (45,1).
SCHRÖDINGER: Nov 33 (43,4).

BOHR COLLECTION, Copenhagen, Denmark. Letter to Bedreag, c. Dec 42; to Bohr, 29 Oct 34, 19 Nov 34, 3 Dec 35, 6 letters 1936-52. See: Bohr.
BEDFORD COLLEGE LIBRARY, University of London, London, England. 3 Letters to W. Wilson, 1948-53.
PAULI COLLECTION, Zurich, Switzerland. See: Pauli.
BURNDY LIBRARY, Norwalk, Conn. Manuscript in Weiner Collection.
EINSTEIN COLLECTION, Princeton, N.J. Correspondence with Einstein, 2 items 1929, 10 items 1951-55.

1895-1904, Naval officer.
1904-14, Research in his own lab.
1908, U. Paris, Dr. ès sci.
1914-19, Milit. Serv.
1919-42, Research in his own lab.

RUTHERFORD COLLECTION, Cavendish Laboratory, Cambridge, England. Letters to Rutherford, 1 Sep 16, 8 Jun 22, 7 Dec 30, 1 letter [undated].
BEDFORD COLLEGE LIBRARY, University of London, London, England. 2 Letters to W. Wilson, 1948-50.
ALGEMEEN RIJKSARCHIEF, The Hague, The Netherlands. Letters to Lorentz.
LIBRARY OF THE SWEDISH ACADEMY, Stockholm, Sweden. Letter to Oseen, 23 Oct 27.

1904-10, U. Würzburg, U. Bonn, U. Munich, U. Breslau: 1910, U. Breslau, Dr. phil. with O. Lummer.
1917-23, U. Breslau: 1917-21, Priv.-Doz.; 1921-23, a.o. Prof.
1923-45, Techn. Hochsch. Danzig, o. Prof.

GERLACH: 28 Jan 22, 23 Feb 22, (19,1).
SCHRÖDINGER: Nov 33 (43,4).
SOMMERFELD: 15 Feb 34, 12 Mar 35, (29,14).

1912-20, U. Utrecht: 1914-15, Lect., Secondary School; c. 1915-20, Asst. to L. S. Ornstein; 1918, Dr. wis.-en natuurkunde. with Ornstein.
1920-22, N. V. Philips Electric Co., Eindhoven, Phys.
1922-50, U. Utrecht, Lect.

Two sessions, 31 pp. transcript.

LANDÉ: 4 May 24 (4,15).

1914-18, U. Leiden: 1916-17, Asst. to P. Ehrenfest; 1918, Dr. phil. with P. Ehrenfest.
1918, Teyler's Foundation, Haarlem, Conservator.
1918-55, Techn. Hogesch. Delft, Prof.

One session, 18 pp. transcript.

BOHR: 9 Jun 21 (BSC 1,3).
EHRENFEST: 30 Jul 28, 6 Jul 32, (75,1).
GOUDSMIT: 4 May 26 (60,7); 19 Jul 26 (60,8).
KRAMERS: 3 letters 1940-43 (11,8).
LANDÉ: 7 Apr 19 (4,15).
RUBINOWICZ: 25 Nov 19 (17,B).

See: EHRENFEST.

BOHR COLLECTION, Copenhagen, Denmark. Letter to Bohr, 2 Aug 31.
LIBRARY OF THE SWEDISH ACADEMY, Stockholm, Sweden. Letters to Oseen, 30 Oct 27, 2 Nov 27, 1 Sep 28, IS Mar 29, 7 Sep 30, 10 Oct 30.
AMERICAN INSTITUTE OF PHYSICS, New York, N.Y. Autobiographical memoir.

Professor Burgers has said that he possesses a considerable amount of assorted manuscript material, some of which may be relevant.