Columbia Gniversity
College of Physicians and Surgeons

620 WEST 168TH STREET
NEW YORK
DEPARTMENT OF

OBSTETRICS AND GYNECOLOGY May Z ; 1946.

Dear Josh;

It looks like we cum isolate both the nucleic acids
from neurospora. We are continuing work in order to determine
yields of both, etc. If you want some for your work I should

“N be very happy to prepare them both for you with & high desree
of purity, if you give us a hand. If you will grow cultures

“ of the wild type or whatever mutant you want worked up we can

take over from there. You'll have to harvest the crop, (centrifuge),
and dehydrate a couple of times with sever&él volumes of alcohol,
tne material can then be sent along to us. Both the nucleic acids
Will be depolymerized in all probability, altho I'm still
working on that angle. Let us know if you are interested.
Ada joins me in our best wishes,

Sincerely,