DOCS.
421,
422 DECEMBER 1917 431
421. To
Gustav
Mie
[Berlin,
29
December
1917]
Dear
Colleague,
Cordial
thanks
for
the
gala copy
of
the
lectures.[1] I
am sending you a
few
more
recent
papers.
Unfortunately I
no
longer
have
the
Annalen
article; however,
it
was
published by Ambr[osius]
Barth
and
is
available at
any
bookstore.[2]
Among
these
papers
I recommend
the
one on
“Hamilton’s
Principle
...”[3]
and
the
one on
quantum theory
in
the
Physikalische
Zeitschrift.[4]
The
art[icle]
“Approximative
Integration
...”
contains calculational
errors.[5] I
intend to submit
a
cleaned-up
version of
it
once
again
to
the
Academy;[6]
it’s
a
pity
when
an
idea
is
presented
so
badly.
Best
regards
from
yours truly,
A.
Einstein.
Happy
New Year.
422.
From Mercur Aircraft Company
Berlin S.E.
36,
29
December
1917
To Professor
Einstein,
Schöneberg,
Berlin, 5
Haberland St.
With
respectf[ul]
reference to
the last
conference,
held
at
the
house of
our
Mr.
Wankmuller,[1]
Dr.
Zehden
offered
us
his additional
opinion regarding
the
lifting
airship.[2]
In
order
to
give
you, Professor,
the
opportunity
to comment
now on
Dr. Zehden’s
point
of view
for the
conference,
possib[ly]
to be held
imminently,
we are conveying
to
you
with
the
enclosed
a
transcription of
Dr. Zehden’s
letter
for
your
kind notice.
Respectfully,
Mercur Aircraft
Design
Co., Ltd.[3]
Enclosure.
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