358 DOC. 34 THEORY OF LIGHT
PRODUCTION
aller
möglichen
Complexionen").
For details of
the calculation referred to in the
text, see, e.g.,
Kuhn
1978,
p.
184.
[17]
In
Einstein
1907h
(Doc.
45),
p.
372,
Ein-
stein
stated
conditions under which
Maxwell's
theory
of
radiation
can
be utilized.
[18]
On the
page proof,
"elektronegativen"
appeared
in
place
of
"elektropositiven."
Ein-
stein
corrected
it to "elektropositiven."
[19]
The
phenomenon
described in the text
was
first
reported
in
Elster and
Geitel 1891 for alkali
metals and
their
amalgams.
Prior to Millikan
1916b,
observations
involving
the nonalkaline
metals seemed
to
contradict their result. Milli-
kan 1916b confirms
it,
as
well
as
Einstein's
pre-
dictions in this section. Contact
electricity
is dis-
cussed in
Einstein's
ETH
notes,
H. F.
Weber's
Lectures
on Physics, ca.
December
1897-ca.
June 1898
(Vol.
1,
Doc.
37),
pp.
178-181.
For
a
review
of
the Voltaic effect and the electro-
motive force
series,
see
Ostwald
1893, chap. 8.
For
a
review
of
contact
electricity, including
the
electromotive force
series,
see
Auerbach
1893.
[20]
On the
page
proof
"stärker"
appeared
in
place
of "schwächer."
Einstein corrected
it to
"schwächer."
[21]
On the
page
proof
"schwächer"
appeared
in
place
of "stärker."
Einstein corrected it
to
"stärker."
[22]
On the
page
proof
"stärker"
appeared
in
place
of
"weniger."
Einstein corrected it to
"weniger."
[23]
On the
page
proof
"höher"
appeared
in
place
of "kleiner."
Einstein corrected it to
"kleiner."
[24]
Einstein's
equation
for
V12
and its
gener-
alization
are
discussed in Millikan
1916a;
exper-
imental tests
of
the
generalized equation are
re-
ported
in Millikan 1916b.