Document XaVQK4N11pv8pjYMqMQKaK3y

COPY <** - Dr R. A. Keh oe r. A p r il 13, 1956 D r . Hyrnin Sh a p i r o , Research P lan n in g C o o r d in ato r , Ch em ical R esearch D iv isio n , Eth yl Corporation , 1600 W est E ig h t M ile R o ad , Fern dale 20, D e t r o it , M ich igan . Dear D octor Sh ap ir o : Your l e t t e r o f A p r il 12 r e ga r d in g your APR-12# (r e - co d e d AP -3) h as been r e c e iv e d in th e a b se n c e o f D r . H e y r o t h , who i s a t home b e c a u se o f illn e ss. In o r d e r t h a t t h e r e w ould be no d e la y in sen d in g you th e r eq u e ste d in fo r m atio n , I have ask e d Mr. W it h e r u p , who i s d o in g t h e e x p e r im e n t a l w o r k , t o make r e p l y t o y o u r l e t t e r . You sh o u ld h e a r from him w it h in a few d a y s. Sin ce r e ly y ou rs, / a / _____________ Floren ce E sse 1 ,Secretary to Dr. Heyroth /fe c c : Mr. S . W ith erup K 0019296