C H R O N O L O G Y , 1 9 1 1 1 9 1
Feb 10 Lectures on fluctuations before the student association of
the University of Leyden (Vol. 3, Doc. 19), and meets with
H. A. Lorentz, H. Kamerlingh Onnes, and W. H. Keesom.
Feb 21 Participates in a further discussion at the Naturforschende
Gesellschaft of Zurich on “The Theory of Relativity” deliv-
ered on 16 January (Vol. 3, Doc. 17). Also gives impromptu
statement on the light quantum hypothesis (Vol. 3, Doc. 20).
Mar 4 Winter semester at the University of Zurich ends.
Mar 30 Registers his move from Zurich to Prague.
Apr 1 Start of appointment at German University of Prague.
Apr 2 On his way to Prague, visits A. Sommerfeld and meets P.
Debye in Munich.
Apr 3–4 With his family, takes temporary quarters in Hotel Viktoria,
Jungmannstr., Prague.
Apr 5 Obtains an apartment at Tr=ebízského 7 in the Smichov dis-
trict of Prague.
Apr 12 Assumes directorship of the Institute of Theoretical Physics
of the German University.
Apr 20 Summer semester at German University begins. Einstein
lectures on the mechanics of discrete mass points and on
thermodynamics, while also conducting a physics seminar.
May 1 E. Nohel begins as assistant to Einstein at the Institute of
Theoretical Physics.
May 4 “Elementary Observations on Thermal Molecular Motion in
Solids” (Vol. 3, Doc. 21).
May 18 “On the Ehrenfest Paradox. Comment on V. Varic=ak’s
Paper” (Vol. 3, Doc. 22).
May 24 Delivers a lecture on “Das Relativitätsprinzip” to the Deut-
sche Gesellschaft für Bohemia—“Lotos” in the Physics
Institute of the German University.
Jun 21 “On the Influence of Gravitation on the Propagation of
Light” (Vol. 3, Doc. 23).
Jul 25 “Supplement to the Correction” (Vol. 3, Doc. 21).
Jul 31 Summer semester at the German University ends.
Aug 23 Takes oath of office as professor at the German University.
Aug 24 Begins negotiations with the University of Utrecht on a pos-
sible appointment there.