WASHINGTON ql su} UNIVERSITY

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SCHOOL OF MEDICINE

SAINT LOUIS (10)
DEPARTMENT OF BACTERIOLOGY AND IMMUNOLOGY

EUCLID AVENUE AND KINGSHIGHWAY

Octcer 15, 1947

Dr. Je Lederberg
Department of Genetics
University of Wisconsin
Madison, Wisconsin

Dear Joshs

Enclosed you will find the galley-proof which
you were so kind in sending. I appreciate very much
the opportunity to read this,and let me say that I
enjoyed every minute of it, not oly for the beauty
of the experiments, but also for a rather surprisingly
remarkable at llity to write.

I gwhall write you at greater length in a
little while after I have had a little tima to digeat
the data further. In the meantime, thanks again.

Sincerely yours,

SA

S. Spiegelmmn

ss/b