Departmant of Pharmacology
_.. vHaryard Medical School
Boston 15,. Massachusetts
Dr. J. Lederberg =. Oo
Department of Genetics
University of Wisconsin
Madison 6, Wisconsin
Dear Dr. Lederberg,
Thank you very much for your letter of
October 18th. I am most grateful for your attention
regarding the means of obtaining ONPG and shall follow
the synthesis published by Seidman and Link,

Sincerely yours,

hheanatre Stacttaeediy