March 31, 1964

Dr. L. Cavalli-Sforza

18, Via Fatebenesorelle

Milan, Italy

Dear Luca:

We are trying to fit the four parameters of the expression
swa,e"P1* + a ,e7>2™ to two~process decay data and find this quite
non-trivial - our program usually diverging unless by 3b5. Have

you 4 verified program to do this?

As ever,

Joshua Lederberg
Professor of Genetics

cf. N.Y. Acad. Sei. 108(1) 1963 ~ but it {ts not redaly much help.

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