1 5 6 D O C U M E N T 9 M A Y 1 9 2 0
(Hence, if we assume the existence of a gravitational shift, we arrive at conclu-
sions that are in contradiction to experience so
far.)[21]
On the other hand, it seems
to be possible to explain consistently the whole available observational data con-
cerning the displacements of Fraunhofer lines, if one assumes that there is no
gravitational shift.
But I still do hope that you will find a solution to the problem that retains the
magnificent General Theory of
Relativity.[22]
Most cordial regards to you, as well as to our colleague Ehrenfest and his es-
teemed wife, also in the name of my
family.[23]
You will, I hope, do us the great
favor of coming again, as last year on 28
October,[24]
to visit us and make music?
For the sake of convenience, I note down here the days of this month of which we
have not yet otherwise availed ourselves and on which you would consequently be
most welcome: 11, 15, 17, 18, 21, 22, 23, 25, 27, 28 , 30, 31.
If there is any desire for discussion, I shall be glad to come to Leyden sometime
as well.
Yours sincerely,
W. H. Julius.
Recipient’s note: “Solar sp[ots] perceived [with] indiff. light.”
9. To Elsa Einstein
[Leyden,] Sunday. [9 May 1920]
Dear Else,
This time even Ehrenfest says I’m somewhat shabby, à la Berlin; for the festive
dress coat is a bit
moth-eaten.[1]
We’re very merry here, even without the violin.
I’m curious what the further developments with it will be. You’ll carry it through,
all
right.[2]
My appointment is encountering difficulties, thanks to my ticklish polit.
renown. But it’s sure to
come.[3]
The peace here is wonderful, likewise the conver-
sations with Ehrenfest and the games with his
children.[4]
Ehrenfest plays magnif-
icent things by Bach for me. Yesterday I was with Kamerlingh-Onnes at the
institute and heard a nice talk by him; saw interesting
experiments.[5]
And the ci-
gars!! In this respect it’s good that you’re not here. It’s raining hard and is cold.
There too? The children
[6]
aren’t letting me write anymore. It’s rollicking fun.
Warm regards to all of you, yours,
Albert.
How was the wedding? I was lucky.