DOC.
34 199
This formula contains the
following, at
least
by
and large
valid,
proposition:
The
more
electropositive
a
metal, the smaller the lowest light
frequency
that
is effective for
that metal.
It
would be of great
interest
to [23]
know
whether
this formula
expresses
the
facts
in
a
quantitative
way as
well. [24]
Bern,
March
1906.
(Received
on
13
March
1906)