3 4 6 D O C U M E N T 3 4 4 O C T O B E R 1 9 2 4
“to the pump”
“metal protective casing”
“single wire electrometer 1 Volt = 50 scale units”
Prior to the commencement of the experiment, let the condensation sphere have
the same potential as the electrometer housing and the protective casing. Under
these conditions, the air will not conduct any electricity between the sphere and the
protective casing. This amount of air will be small, incidentally, so very good iso-
lation is to be expected. It will suffice if 50 to 100 g of liquid are transferred within
a relatively short period.
I believe that in this way, after few preliminary trials, we are going to arrive quite
quickly at an irrefutable result. The design of the apparatus does demand some
time, though. For that I do have a very able assistant in Dr. Kessler.
I hope to be able to report more to you soon.
With my best regards, in great respect, your grateful and devoted
344. From Paul Langevin
Paris, 23 October 1924
My dear friend,
I have just accompanied Dr. Gumbel to Orléans to present him to the public—
he is currently on a very useful tour of conferences to several provincial French