DOCUMENT
134 JANUARY 1909
97
Imagine a completely
closed vessel
completely
filled with water
into which
2
electrodes
are
inserted. After
a
short
passage
of
current,
the
pressure
must be
enormous;
what
is the
reason
why
the
energy principle
is
not
violated here.
Do the
ions
travel with
greater
difficulty?
This
question
is
closely
related
to the
question,
what does
a
generating apparatus
(e.g.,
for carbon
dioxide)
do
when the
gas gets
collected
under
pressure
is
less
produced? I
don't think
so,
because
so
and
so
much
soda combines with
the
correspond-
ing weight
of tartaric
acid to
yield
the
corresp. weight
of
CO2.
My
intuition leads
me
to
expect
that the
production
will
proceed
at
a
slower
pace;
but
this has
nothing
to do with
the
pot
energy
of
CO2
stored
up
thereafter.
Hence,
the
production
of the
gas
must
be
accompanied
by
a
smaller increase
in the
temperature
of
the
liquids.
As
you
can see,
I
can
keep
on drawing
conclusions for
a
whole
hour
is
this not
interesting?
A
man
who has
been
tramping
around
in this
area
as
much
as you
have must be able
to
make
something
out
of
this
am
I
wrong?
Cordially, your
We
are
making
a
desk-top
electrostatic voltmeter like
a
Hartmann
&
Braun
demonstration instrument.[2]
Sensitivity
about
1-100 volt with
a
very good
proportionality
15
cells.
Pointer about 7-8
cm
long.
P.
H.
principle