Prof

May 14 1961

J Lederberg

I attended the seminar on the sex ratio, and heard

the lecturer from Oregon.

The variation he was able to correlate was with age
of the father. You showed him how to correlate the

anomalous fourth moment with familial choice.

He did not mention a hypothesis to correlate seasonal
variation, nor number of birth. A number of reasonable
explanations present themselves. Another problem

is the variation with race. I believe a single
hypothesis will explain all these variations; however

I should first need to know that for horses, the
correlation with number of birth is absent before I

could put forth my p hypothesis with confidence. Is

this information available? {42 rh
Joel Bre

er
Senior Mathematician
SRI, Menlo Park