2 0 0 C H R O N O L O G Y , 1 9 1 5
May 14 The Dutch version of the Ampère current paper is pub-
lished. Reelected member of the advisory committee of the
DPG.
ca. Jun Becomes member of the Bund “Neues Vaterland.”
Jun 2 Lectures on relativity of motion and gravitation to Society
of Friends of the Berlin-Treptow Observatory.
Jun 15 “Comment on the Essay Submitted by Knapp: ‘The Shear-
ing of the Light-Ether…’” (Vol. 6, Doc. 17).
Jun 24 “Response to a Paper by M. von Laue: ‘A Theorem in Prob-
ability Calculus and Its Application to Radiation Theory’”
(Vol. 6, Doc. 18).
Jun 28–Jul 5 Spends a week in Göttingen to give six lectures on general
relativity under the auspices of the Wolfskehl Foundation.
Jun 29 Lectures “Über Gravitation” to Mathematical Society of
Göttingen.
Jul 10 Observes experiment in Kiel on stability of the Sperry com-
pass in the patent dispute Anschütz vs. Sperry.
Jul 15 Vacations in Sellin (Rügen) with Berlin relatives.
Jul 22 Returns to Berlin to attend a session of the PAW.
Jul 24–Aug 5 Continues vacation in Sellin.
Jul 27 With 90 others, co-signs an open letter to Chancellor Beth-
mann Hollweg opposing the annexationist policy advocated
in the so-called Seeberg memorandum.
Aug 7 “Supplementary Expert Opinion” on Anschütz vs. Sperry
Gyroscope (Vol. 6, Doc. 19).
Repeats the Ampère current experiment with alternating
current, but a week later breaks off experiment because of
optical difficulties.
Aug 29 Departs on a trip to Switzerland, with layover in Heilbronn.
Sep 16 With H. Zangger, meets R. Rolland in Park-Hôtel Mooser,
Vevey, Switzerland.
Sep 22 Returns to Berlin.
Oct 16–Mar 15, 1916 Holds course on statistical mechanics and Boltzmann’s
principle at the University of Berlin, Thursdays, 2–4 P.M.
Oct 23–Nov 11 “My Opinion of the War” (Vol. 6, Doc. 20).
Nov 4 Submits “On the General Theory of Relativity” (Vol. 6,
Doc. 21) to the PAW.