UNIVERSITY OF CALIFORNIA
COLLEGE OF AGRICULTURE
AGRICULTURAL EXPERIMENT STATION

DIVISION OF FOOD TECHNOLOGY
BERKELEY 4, CALIFORNIA

August 10, 1951

Dr. Joshua Lederberg

Associate Professor of Genetics
The University of Wisconsin
4adison, 6 Wisconsin

Dear Dr. Lederberg:

If you can give me some idea about how many coliforms I should
send you from our collection I will be grateful.

The organisms with which we are working now are mostly of the
Escherichia coli group.

I have so many of them (about 1000 cultures), 500 of which have
been identified as to species grouping. I presume cultures from
tris group would interest you the most but I have no idea of how
many you want and I am hesitant to send you transplants of all
of them unless I hear from you.

Thanks ever so much for putting my name on your mailing list.

Very truly yours,

oA lghe

RiVev Reese 4. Vaughn