D O C U M E N T S 2 0 7 , 2 0 8 N O V E M B E R 1 9 2 0 4 9 3
Mit frdl. Grüssen von Haus zu Haus Dein
M. Grossmann
TKS. [11 462]. The postcard is addressed “Herrn Prof. A. Einstein Berlin Haberlandstr. 5,” and post-
marked “Zürich VIII Neumünster 20 XI 20– 15.”
[1]Doc. 148.
[2]Einstein’s remarks did not, after all, appear in print. Grossmann’s statement (see the following
note) was published by itself in the Archives des sciences physiques et naturelles, of which Charles-
Eugène Guye was the editor. Einstein’s letter is not part of Grossmann’s note.
[3]See Grossmann 1920, in which it is pointed out that the quantity t is not an invariant, and that,
accordingly, Guillaume’s relation (see Doc. 77) is, mathematically speaking,
merely an identity. A response from Guillaume follows Grossmann’s remarks.
207. Augustus Trowbridge[1] to Heike Kamerlingh
Onnes
[…] WASHINGTON […] 22/11 […]
[1920][2]
=
PLEASE COMMUNICATE FOLLOWING TO EINSTEIN RESEARCH COUNCIL NATIONAL
ACADEM[Y]
AUTHORIZES ME EXTEND INVITATION TO LECTURE AT SEVERAL
LEAD-
ING AMERICAN UNIVERSITIES TO POSTGRADUATE STUDENTS MATHEMATICAL
PHYS-
ICAL GROUP PROBABLE
DU[RA]TION
OF TRIP TEN WEEKS PREFERABLE BEGINNING
IN JANY HONORARIUM THREE THOUSAND DOLLARS AND FULL TRAVELLING
EX-
PENSES WILL WRITE DETAILS ON RECEIPT REPLY STOP CABLE ANSWER COLLECT TO
NATIONAL RESEARCH COUNCIL WASHINGTON
=
TROWBRIDGE
Tgm. [14 376]. The telegram is addressed to “Kamerlingh Onnes University Leyden.”
[1]Augustus Trowbridge (1870–1934) was Chairman of the Division of Physical Sciences and
Secretary of the Research Fellowship Board of the National Research Council.
[2]Year added by the fact that the telegram was forwarded to Einstein together with the next docu-
ment.
208. From Heike Kamerlingh Onnes
Leiden, Huize ter Wetering Haagweg, 23 Nov. 1920
Lieber Kollege und Freund,
Herzlichsten Dank auch im Namen meiner Frau für Ihren lieben Brief und auch
an Ihre verehrte Frau Gemahlin für den lieben Brief an meine Frau. Ich muss mich
jetzt auf ein einzelnes Wort der Freundschaft beschränken weil ich eben von Coll.
1
t1
2
t2 = =