228

THERMODYNAMIC EQUILIBRIUM

[7]

p2volt =

10-6

.

If

one

imagines

that the

two

plate

systems

can move

relative

to

one

other,

so

that

they

can

be completely

separated,

one

can

get

the

capacitance

to be

of order

of

magnitude 10

after the

plates have been

moved

apart.

If

i

denotes the potential difference resulting

from

p

due

to

the

separation,

one

obtains

r2=

10-6

.

5,000/10

=

0.0005

volt

.

Thus,

if the condenser is short-circuited

when

the plate

systems are

pushed

together, and

the

plates

are

pulled apart

after the connection

has been

broken, potential differences of the order

of

magnitude

of one-half millivolt

will result

between

the plate

systems.

It

does not

seem

to

me

out of

the

question

that these

potential

differ-

ences

may

be

accessible

to measurement. For

if metal

parts

can

be

electrically

connected and

separated

without the

occurrence

of other

irregular potential

differences

of

the

same

order of

magnitude

as

those calculated

above,

then it

must be

possible to

achieve the

goal

by

combining

the

above plate

condenser

[8]

[9]

with

a

multiplier.

We

would

then

have

a phenomenon

akin

to

Brownian motion in

the

domain

of electricity

that could be used

for

the

determination

of

the

quantity

N.

Bern, December

1906.

(Received

on

12 December

1906)