130
DOCS. 174-176 AUGUST
1909
174.
To
Ernst Mach
[Bern,
9
August 1909]
Highly
esteemed Professor
Mach:[1]
Thank
you very
much for
sending
me
the
lecture
on
the
law of
conservation of
work,
which I have
already
read
over
with
care.[2]
Naturally,
I
am
well
acquainted
with
your
principal works,
of
which
I
especially
admire
the
one on
mechanics.[3]
You
have
had
such
an
influence
on
the
epistemological
views of
the
younger generation
of
physicists
that
even
your
current
opponents,
such
as,
e.g.,
Mr.
Planck,[4]
would
undoubtedly
have
been declared
to
be "Machists"
by
the
kind
of
physicists
that
prevailed
a
few
decades
ago.
Since
I cannot
think of
any
other
way
in which to show
you my
gratitude, I
am
sending
you
some
of
my
papers.[5]
I would
especially
like
to
ask
you
to
take
a
cursory
look
at
the
one on
Brownian
motion,[6]
because here
is
a
motion that
we
believe
must
be
interpreted
as
"thermal motion."
With
profound respect,
yours very truly,
A.
Einstein
175.
To
Ernst Mach
Bern, 17
August
1909
Highly
esteemed Professor
Mach:
I
was
extremely
delighted
with
your
kind
letter,[1]
and
not
less
so
with
the
essay.
All
of
the
things you
wrote to
me
about
you
personally
were
already
known to
me,
as they
are
known
to all
friends of
science. I
admire
your
great
energy.
It
seems
that
I
forgot
to
send
you
the
papers.[2]
But I
am sending
them
now along
with this
postcard.
I
am
very happy
that the
theory
of
relativity gives you
pleasure. Unfortunately,
I have
no
more
copies
of the
review
paper
on
this
subject
that
I
published
in
the Jahrbuch
fur
Radioaktivität
&
Elektronik.[3]
Thanking
you again
with all
my
heart
for
your
kind
letter,
I
remain
your admiring
student,
A.
Einstein
176.
To
Edgar
Meyer
Bern,
28
August
1909
Esteemed Dr.
Meyer:
I
am
delighted
that
I will
see you soon.
You
might
find it most
convenient
to
see me
in
my
office
(8-12
&
2-6)
because
my
apartment
is
a
bit
out
of the
way.[1]
The
only