1 2 2 D O C U M E N T 1 2 6 S E P T E M B E R 1 9 2 3
With radiator without foil = S1
With radiator with foil = F1
B.) At 15°: Scattering without sec. radiator = Z2. Now the slit
by the chamber is narrowed down until Z2 = Z1 and then measured
as above and the ratio is formed.
Unfortunately, I have to wait for 2 days until the chamber has been rebuilt.
Upon receipt of the chamber I would like to repeat the experiments in that way;
then continuously register the angular region and from 0° to 90°, and finally try out
various substances as a secondary radiator.
I would be very grateful to you, Professor, if you would let me know whether
you agree with this kind of procedure, particularly, which errors I have made in the
process and whether you, Professor, think that the figures found above speak to
Compton’s finding.
With my best compliments and wishes, I am, Professor, your ever gratefully de-
voted
H. Mark.
126. To Betty Neumann
[Leyden,] Sunday, 30 September 1923
My dear Betty,
Who knows whether you received the letter from Cologne that I had entrusted to
the station porter during the stopover in
Cologne.[1]
He did solemnly promise as
much. It was on the trip Bonn–Leyden, which had some resemblance to Odysseus’s
travels, as concerned the
complexity.[2]
There were no sirens or Calypso or the like,
just Cyclopses and tribulations. In one week it’s homeward bound again after six
weeks wandering
about.[3]
A couple of excursions with you would have been more
preferable to me, nice though it is here in sleepy Holland at my old friend
Ehrenfest’s[4]
with those dear little children! I was by the sea with them yesterday.
Take heart, Betty, and simply write to me in my lair, 5 Haberland St. I’ll be on the
lookout from October 12th until the 30th to ensure that nothing falls into the wrong
hands. And if so, then that’s no misfortune, either. I don’t want to be stranded with-
out that little something from your dainty paws; it’s grim enough as it is. I’m a little
S2
F2
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