CALENDAR 1918 1021
April
23 Visits Planck
at
home with Rubens and Laue. The
latter
pre-
sents
Planck
with
an honorary
doctorate
of
the
University
of
Frankfurt
on
the
occasion of
Planck’s 60th
birthday.
April
26
1-page
ALSX to
Minna
Stern,
appended
to
a
letter
from
Pauline Einstein and to
a postscript
from Elsa Einstein. Ein-
stein thanks Stern for
her
help
in
obtaining
condensed
milk,
in
spite
of
a personal tragedy
that has befallen her. Prove-
nance:
Daniel
F.
Kelleher Co. auction
catalogue
585
(1990),
lot 392.
[75 207].
Chairs the DPG session in celebration
of
Max Planck’s 60th
birthday.
Presents his
talk,
"Planck
als wissenschaftliche
Persönlichkeit." Provenance: Deutsche
Physikalische
Gesellschaft. Verhandlungen
20
(30
June
1918), nos.
9-12,
p.
69. See also Vossische
Zeitung (27 April
1918),
Evening
Edition,
no.
214,
p.
[2].
Published
as
"Motives
of
Research"
(Vol.
7,
Doc.
7).
before
April
27
At
the
prompting
of
Georg
Nicolai, suggests
to David Hil-
bert
and others
a
collective
appeal,
to
be
individually
com-
posed
and addressed to neutral countries
as a
token
of
the
international
spirit
of
Germany’s
intellectuals.
April
28
1-page
ALS from
Georg Klemperer
in Berlin. The
director
of
the
department
of
internal medicine
of
the
municipal
hos-
pital
in
Berlin-Moabit
thanks Einstein
for
his letter
of
April
20,
stating
that
he must
already
have heard that he has inter-
vened,
in accordance with Einstein’s wishes
(perhaps
in the
diagnosis
of
Pauline Einstein’s
cancer).
He commends Ein-
stein for his
philanthropy.
Provenance: IsJHU.
[44 146].
May 1-page
TDft from
Einstein
and
other
members
of
the advi-
sory
committee
of
the DPG.
Appeal
for
money
from Ger-
man industry
to
continue
publication
of
Fortschritte
der
Physik.
Provenance: IsJHU.
[43 699].
May
1
1-page
TLS from Wilhelm
von
Siemens.
Requests
Einstein
to
render the
accounts
for
the
period
of
December 1917 to
March
31, 1918,
for submission
to
the KWI
board of
trust-
ees.
Provenance:
GyBP,
I. Abt.,
Rep.
34,
Nr.
8, Mappe
Mendelssohn.
[77 873].
May
2 Announcement
of
the
founding
of
the KWI in Elektrotech-
nische
Zeitschrift
39,
no. 18,
p.
179. [82 257].
Communicates
Weyl
1918b and his
own
"Supplement"
(Vol.
7,
Doc.
8)
at the
plenary
session
of
the
PAW.