Document n9epaB408DMmKr0bBLN8gJZNG

rl. April 18, 1956 Dr. Hymin Shapiro, Research Planning Coordinator, Chemical Research Division, Ethyl Corporation, 1600 West Eight Mile Road, Ferndale 20, Detroit, Michigan. Dear Doctor Shapiro: Your letter of April 12 regarding your APR-128 (re-coded AP-3) has been received in the absence of Dr. Heyroth, who is at home because of illness. In order that there would be no delay in sending you the requested information, I have asked Mr. Witherup, who is doing the experimental work, to make reply to your letter. You should hear from him within a few days. Sincerely yours, /a/ _______________ Florence Essel,Secretary to Dr. Heyroth /fe cc: Mr. S. Witherup