1 8 V O L U M E 5 , D O C U M E N T 3 4 9 a
the University of Zurich two weeks earlier (see Aus dem Protokoll des Regierungsrates 1912, no. 54,
11 January 1912, SzZSa, U 110b .2 (48)).
[6]Debye was formally appointed Professor of Mathematical Physics and Theoretical Mechanics
at the University of Utrecht on 3 February (see Nederlandsche Staatscourant, 4–5 February 1912, p. [2]).
[7]See Einstein 1912b (Vol. 4, Doc. 2). See also Vol. 4, the editorial note, “Einstein on the Law of
Photochemical Equivalence,” for a discussion.
[8]Heinrich Rubens (1865–1922) was Professor of Physics at the University of Berlin.
[9]See Einstein to Hendrik A. Lorentz, 23 November 1911 (Vol. 5, Doc. 313), note 7, for informa-
tion on Einstein’s paper on residual rays. He had argued that the two observed maxima were in fact
one wide resonance peak (see Einstein to Michele Besso, 26 December 1911 [Vol. 5, Doc. 331]). The
fact that new experimental data found by Rubens’s collaborator H. Hollnagel at first seemed to con-
firm the existence of the two peaks is mentioned in Rubens 1913. This paper presents further
experimental results, however, from which it is concluded that a selective absorption by water vapor
in the air had been responsible for the observation of two maxima.
[10]See Eucken 1912.
[11]A year later Einstein and Otto Stern submitted a paper in which a theoretical explanation is
given for Eucken’s results (see Einstein and Stern 1913 [Vol. 4, Doc. 11]). See Vol. 4, the editorial
note, “Einstein and Stern on Zero-Point Energy,” pp. 270-273, for a discussion.
[12]The offer was made in early January 1912, and Einstein declined it in late January (see George
Pegram to Einstein, 9 January 1912 [Vol. 5, Doc. 337], and Einstein to Pegram, 29 January 1912
[Vol. 5, Doc. 346]).
[13]An invitation was extended to Einstein to lecture in Vienna at the end of January (see Robert
Gnehm to Einstein, 16 December 1911 [Vol. 5, Doc. 326], note 1). In February, Einstein mentioned
two lectures (see Einstein to Michele Besso, 4 February 1912 [Vol. 5, Doc. 354].
[14]On the controversy between Einstein and Max Abraham (1875–1922), Professor at the Milan
Polytechnic, see Einstein to Wilhelm Wien, 27 January 1912 (Vol. 5, Doc. 343), note 3.
[15]While in Prague in June of the previous year (see Einstein to Heinrich Zangger, 7 June 1911
[Vol. 5, Doc. 268]) and again in September (see Einstein to Heinrich Zangger, 20 September 1911
[Vol. 5, Doc. 286]), Zangger had visited a patient on at least one of those occasions (see Einstein to
Heinrich Zangger, 7 November 1911 [Vol. 5, Doc. 303]).
Vol. 5, 349a. To Heinrich Zangger
[before February
1912][1]
Lieber Herr Zangger
Sie zeigten mir neulich eine Beziehung über Verdampfungswärme. Hiess sie
nicht = unabhängig von Temperatur? Wenn das nicht angenähert richtig ist,
dann ist meine Sache über Kapillarität Mist.[2] Notieren Sie mir bitte womöglich,
wo etwa jene (ich glaube englische) Abhandlung zu finden ist. Erinnern Sie sich,
was ich drüber nörgelte? Schnell fertig ist die Jugend…
Mit herzlichen Grüssen Ihr
Einstein.
ALS (SzZ, Nachl. H. Zangger, box 1a). [87 061].
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