March 20, 1936
Dr. Clarence Zener
Wayman Crow Hall of Physics
Washington University
St. Louis, Mo.
Dear Clarence:
I am glad to hear that there is a chance that you will get a still better job then your present one. If anyone from Seattle writes to me about you I shall support you very strongly. So far they haven't written. In case that you want me to send them a letter regarding you on my own initiative, or rather your initiative, let me know.
I was interested to see your work on the intensity of reflection or X-ray by anisotropic crystals. You will be interested to know that Dr. Helmholz has discovered the effect independently of you in silver phosphate. In silver phosphate the silver atoms are surrounded by four oxygen atoms at the corners of a very flat tetragonal bis- -noid. Helmholz found that the X-ray data could be accounted for only by assuming that the restoring force in the horizontal plane of the bis- -noid is about fifty per cent greater than that along the tetragonal axis. His paper is to appear soon in the Journal of Chemical Physics,
With best wishes, I am
Yours sincerely,
Linus Pauling
LP:mrl