7 8 D O C . 9 6 A U G U S T 1 9 1 9
Lorentz transformation. It would be different if the radii were considered material,
but not the tangential connections of their
endpoints.[5]
What you say about the measuring rods and clocks placed on the periphery is
completely
untenable.[6]
An unjustifiable transferral of results of the special theory
of relativity to accelerated systems (relative to the inertial system) is involved
there.[7]
Freundlich and Schlick are definitely right
here.[8]
By your manner of
deduction, one could just as well conclude that every light ray must propagate
along a straight line relative to an arbitrarily rotating system, etc. Your misunder-
standing is very fundamental. I would have much more to say, but face-to-face ar-
gument and counterargument are much easier.
With best regards, yours,
Einstein.
96. From Jean Perrin[1]
Paris, 28 August 1919
My dear Einstein,
First of all, I would like to tell you that it was a great comfort for everyone here
who admired and liked you to learn from our friend Pierre
Weiss[2]
that since the
beginning of the great ordeal and throughout its entire duration you always knew
where to look for justice.
We shall have a lengthier chat about that someday and, in recollecting our old
conversations,[3]
I cherish the hope that we should have very closely related con-
ceptions of the Ideal towards which Humanity should strive.
From the point of view of science, Weiss tells me that you have achieved some
very great things, and I am not surprised. I would be very pleased if you could send
me (Sorbonne, Paris) a few [offprints].
Without drawing any comparison, toward the end of the war I also managed to
write up the lecture I had given in Zurich (Fluorescence, Luminescence), delving
somewhat
deeper.[4]
Above all, I developed an idea that I had already introduced to you (around 1911,
I believe, or 1912???) [on] chemical reactions. (You then doubted that any mono-
molecular decomposition would take place in gaseous media without a catalyst—
but I believe the objection can be removed.) I would be gratified if you read this
paper carefully (Matière et
Lumière).[5]
There you will find, in particular, a theory
of radioactivity that, provided it is accurate, would be of
importance.[6]
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