438 DOCUMENT 377 MARCH 1912
geht,
auch dass Marie ein Bübchen
(?)
bekommt,
von
dem ich
übrigens ja
im-
merhin
so
eine Art Onkel
bin.[14]
Vero
will ich
ein
kleines Buch mit
Anleitung
zu
schönen Versuchen
senden.[15]
Du
musst
Ihm aber
etwas
dazu helfen.
Seid herzlich
gegrüsst
von
Euerm
Albert.
[...][16]
ALSX.
[7
066].
[1]The
year
is
provided by
the reference
to
Einstein's
paper.
[2]See
Einstein 1912d
(Vol. 4,
Doc.
4),
submitted six
days
earlier
(see
Doc.
375).
The
fol-
lowing
summarizes this
paper
and the
preceding one,
Einstein 1912c
(Vol.
4,
Doc.
3).
Most of
the
equations
cited below
are
also
in
Einstein's "Scratch Notebook"
(Vol.
3, Appendix A),
[pp.
38-39].
See also the editorial
note,
"Einstein
on
Gravitation and
Relativity:
The Static
Field,"
for
a
discussion.
[3]Should be
"Weg."
[4]Einstein 1912c,
1912d
(Vol. 4,
Docs.
3
and 4)
both appeared
in
the Annalen der Physik
on 23 May.
[5]See
Doc.
343,
note 3,
for
more on
the difference of
opinion
between Einstein and Max
Abraham.
[6]Einstein
1912b
(Vol. 4,
Doc.
2) appeared
the
same
day
this letter
was
written. See
Vol.
4,
the editorial
note,
"Einstein
on
the Law of Photochemical
Equivalence,"
for
a
discussion of
the
paper.
[7]Einstein's
earlier remarks
to
Besso
on
this topic
are in
Docs.
331 and 354. He
had
with-
drawn
a
paper
on
the subject two months earlier (see Doc.
343). See Doc.
313, note
7, and
Doc. 344,
note
5,
for more details.
[8]Einstein
visited Berlin the third week of
April (see
Doc.
384).
[9]Walther Nernst,
Max
Planck,
Heinrich
Rubens,
Emil
Warburg,
Fritz
Haber,
and Erwin
Freundlich.
[10]Nernst
had
published
a
proof
of
his heat theorem
that
was
contested
by
Einstein.
See
Doc.
364, note
6,
for
more
background,
and Doc. 366 for information
on
Nernst's reaction.
[11]Paul
Habicht had
gilded
parts
of the "Maschinchen"
to prevent contact electricity.
See
the editorial
note,
"Einstein's
'Maschinchen' for the Measurement of Small
Quantities
of Elec-
tricity,"
pp.
51-55. The
"Auerstrumpf"
or
Welsbach mantle, named after Carl
Auer
von
Wels-
bach
(1858-1929),
was
a
very
successful and
widely
used
gas
mantle.
Habicht
apparently
concluded
that radon
gas evaporating
from the mantle of
a
gas lamp
in the
vicinity
of the
"Maschinchen"
was
responsible
for
spurious
ionization.
[12]On
9
March
1912
Paul
Habicht
delivered
a
lecture
to
the Schweizerische
Physikalische
Gesellschaft
on
the "Maschinchen"
(see
Habicht,
P. 1912).
[13]Einstein
was
to begin
a
teaching appointment
in
Zurich
in
the
autumn (see
Doc.
341,
note
1).
[14]Marie
Müller-Winteler
gave
birth
to
Paul Albert Müller
on
8 August
1912.
Einstein's
reference
to
himself
as
"a kind of uncle"
is
based
on
the fact that his sister
Maja
was
married
to
Müller-Winteler's brother,
Paul
.
[15]The
book intended for
Vero
Besso
was
probably Neuburger 1911,
an
experimental phys-
ics
primer,
which
Einstein mentions
in
his "Scratch Notebook"
(Vol. 3, Appendix
A),
[p.
57]:
"Experimental Physics
Book of
Delights
Albert
Neuburger" ("Erg. Exper.
Buch Albert Neu-
burger").
[16]A postscript
by
Mileva Einstein-Marid
is
omitted.
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