D O C U M E N T S 6 6 , 6 7 M A R C H 1 9 2 2 8 3
66. To Erich Marx
[Berlin, after 3 March
1922][1]
Was written in
1912.[2]
I regret, it is far too outdated, impossible to grant permission.
I cannot bring myself to allow the m[anuscri]pt to be published in the present
form.
67. To Hans Albert and Eduard Einstein
[Berlin,] 4 March 1922
Dear boys,
From your letter I see that all is well with you, particularly that noble Musica is
flourishing. I meanwhile bought a most lovable sailboat with a sail in impeccable
condition,[1]
so our time together at the so-called castle will be
magnificent.[2]
We’re going to play music on Katzenstein’s grand piano, which he’s happy to make
available to
us.[3]
We’ll have to drive there for ½ an hour or walk for an hour,
though. But that won’t put us off. You’re entirely right about dancing, d[ear] Albert;
one has to do something for the fairer sex, whom as experience shows one cannot
do
without.[4]
The status of the gyroscope affair is this: the electrolyte liquid, of specific weight
2, proved not to be stable enough, after all, so water had to be resorted to, which
consequently leads to an enlargement of the suspended
part.[5]
My electrical
arrangement is working quite
satisfactorily.[6]
The ice box is making progress.
We’re negotiating a contract with the local firm Borsig right
now.[7]
The patent
issue is still entirely obscure; but we do in any event have the right of joint use—in
case the other patent, which is still not published, should come into serious conflict
with ours in any way.
It’s amusing that you both have such similar
handwritings, hardly distinguishable. I’m so
thrilled about every sign of life from you, even if
you have nothing particular to say; do write short
postcards more often. I’m now planning another
light experiment. Cathode rays fall onto a small
leaf of mica and cause it to glow at the surface.
The light comes out in part directly, in part after
reflection off the rear surface. The question is
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