THE UNIVERSITY OF TEXAS
AUSTIN 12

Merch 4, 1948

DEPARTMENT OF ZOOLOGY

Dr. Joshua Lederberg
Department of Genetics
University of Wisconsin
College of Agriculture
Madison 6, Wisconsin

Dear Dr. Lederberg:

I am sorry the manuscript on catalase
work has been delayed, but Wyss promises the final
rechecks will be finished in a day or so and will
get it off to you. We hope this has not inconven-
fenced you.

Haas ran a few checks of your coli cultures
and they gave the prototrophs in their aporopriate
combinations confirming your results. We have not
done very much as we are learning the techniques to
use in some tests. We will let you know how things

BO.

We would like very much your opinion
on the validity of this work (good or bad) now that
you have seen the additional data,

Yours sincerely,

Wilson S. Stone

Professor of Zoology
WSS/1k