6 Ban

tA 7
ay | ao 32: 8596 (1457) Il e 2

Ap¥420R7, 1951.

Dear Dr. Bacon-

I should be indebted to you for two copies (one for Mr. Zinder)
of the two papers on biochemical mutante of B. typhosum which appeared
in tre Dec. 1950 iseve of the Brit. J. Exp. Rathology. I hope that

this investigation is being contimed; if so, I would appreciate being
on your mailing list for future publications.

Yours sincerely,

cushus Lederberg,

agscclat: “rofagsor of enetics
Cab.