BIOGRAPHIES The following sketches provide biographical information about persons who first figure in Einstein's life in some document appearing in this volume. They give special emphasis to the subject's relationship with Einstein. The significance of that relationship and the absence of biographical information in standard reference works are the criteria used in selecting the subjects. The surnames of biographical subjects are printed in small capital letters in all ed- itorial matter in this volume. Chavan, Jules Adolphe Lucien b. 19 March 1868 in Lausanne, Switzerland d. 27 August 1942 in Geneva Student and friend of Einstein. 1886, appointed aide in the cantonal Tele- phone Bureau of Geneva. 1890-1893, did work in the physics laboratory, University of Geneva, while still employed at Telephone Bureau. 1898, mar- ried Jeanne Susanne Adele Perrin. 1898-1899, attended mathematics lec- tures, University of Geneva. 1900, appointed technical secretary in the Fed- eral Postal and Telegraph Administration in Bern. 1901-1903, received pri- vate 19 instruction 1868 Adolf Gasser. 1903-1909, received private math and electrotechnical instruction from Einstein. 1904-1905, at- tended 27 in 1942 equations and integrals, University of Bern. 1908, appointed electrotechnician first class at the Federal Postal and Tele- graph Administration summer semester, may 1886, audited Einstein's course in molecular theory of heat at University of Bern. 1909-1911, encountered problems with his superior, which Einstein helped to resolve in his favor by interceding on his behalf with Bundesrat Ludwig Forrer. 1921, retired to Geneva. 1924-1934, worked in the physics laboratory and attended courses in mathematics and physics, University of Geneva. Jeanne Chavan-Perrin and Mileva Einstein-Maric were especially close, and Hans-Albert Einstein often spent vacations with relatives of the Chavans in Geneva. Sources: His notes, SzZE 1890-1893, Schweizerisches Bundesblatt and Staats-Kalender Seelig 1960 Flückiger 1974.