Tepartment of Voology
Columbia University

October 29, 1950
Dear Josh,

I've finally finished my thesis and become
a member of the union. Before I send the manuscript in
to a publisher I would like to cneck with you on a reference
to your work which is, I think, unpublisnec. In sup;ort
of the hypothesis that ultraviolet radiation produces nuclear
killing I state : "Lederberg (unpublishee) has induced
homozygosity in K12 heterozygotes with ultraviolet radiation?
Is tnis allrignt with you ?

I hag a good time at the orals, at which there
was grilling by Bernie Tavis, svelyn #itkin and especially
Dunn, who made me add a lot of conjecture to the thesis.

About the middle of next week I am leaving
for Caltech, caving finally gotten the fellowsiir from
Public Health, to work with Max. Altnouzn I won't be leaving
there before next October, I'll be interested to near about
the possibilities of coming to your laboratory. Pernaps
you can sugzest the best agency to apvroacn for e fellowsnip-
I think Public health will be out after this year, since
they Go not usually support peo;le for more then two yeurs.

With best wishes-— also to ustner and sorton
Siaaky

Zinder-