1 9 0 D O C U M E N T 3 0 5 N O V E M B E R 1 9 2 1
greetings.[9]
Tomorrow I’m visiting
Lorentz.[10]
I can’t make it to Delft anymore to
see de
Haas.[11]
Everything’s tightly scheduled for me. I had my gray suit on every-
where and all the time, now with the striped trousers, because the others are torn.
So not a trace of elegance.
Warm reg[ards] to all three of you with the
elders[12]
from your
Albert.
304. From Heinrich Zangger
Zurich, 21 November 1921
[Not selected for translation.]
305. From Theodor Kaluza
Königsberg, Pr[ussia], 34 Steinmetz St., 28 November 1921
Highly esteemed Professor,
According to your wish, I am sending you a brief summary of my idea. I first
showed how for small
[1]
everything goes smoothly and then marked the diffi-
culties in the electron’s
motion.[2]
–
It recently occurred to me that the upper limit for , still allowing for the ad-
ditional term with in the equations of motion, would be about reached if
particles of about ~ 10
6
g are charged with a few elementary
quanta.[3]
Now,
Ehrenhaft’s inconsistencies probably lie, for the most part, among the smaller par-
ticles, hence a larger specific charge, i.e., a larger
[4]
(whereas Millikan’s could
just barely pass by).[5] You will be able to see better whether it is pure idiocy to
imagine a connection here. In this case let the indicating note to (8) be omitted![6] –
Among all the possibilities that I considered for the elimination of this inconsis-
tency initially arising for the electron’s equations of motion, the one that attracts
me most is the one I sketched in the second to last section. For
( is small), the scalar T of the energy tensor [for matter not moving all that
furiously][7]
also becomes for the field equations of the 1st type:
dx0
ds
------- -
dx0
ds
------- -
dx0
ds
------- -
2
dxv
ds
------- -
gik –
ik ik
+ =
ik
T00 T44 + – ~