New York, N.Y. 10022 R.

Universi^ of Cincinnati DEPART MENT OF ENVIRON MEN T AL HEALTH Ket t er i ng Laborat ory, Col l ege of Medi ci ne, Eden & Bet hesda Aves.

LIA15536 m i^otesaatfiiaMMiu imw i i i.n.iw .wnifmip.ipii i y i 1!

GILLESPIE DWYER COMPANY I VENTILATION CONTRACTORS PLATE AND SHEET METAL FABRICATORS INVOICE NO. 4537 West Lake Street Chicago.

Form 45A.

Jim* 17, 1971 Mr.

p 292 Madison Avenue New York.

November 11, 1971 George Roush, Jr., M.D., Medical Director Ethyl Corporation Laboratory of Environmental Medicine 1700 Perdido Street New Orleans, Louisiana 70112 Dear George: I have neither seen nor written to you for some time, ana I feel very much as though I have been unduly isolated (from you), although I do not acknowledge any intent on my part to isolate myself.

DEBIT/CREDIT NOTE <=r g --^ AMERICAN CVANAMID COMPANY WAYNE.

ZONE -------------------------------------------------------------------------------------------------------------------- MO. 93-1!

December 13, 1973 Bernard Sobel Ethyl Corporation P.0.

^ FOR DU PONT USE ONLY DATE September.19, 1975 TEST AUTHORIZATION NO.

V^ March 13, 1972 Mrs, J.

bees J.

F&F DEPARTMENT RESEARCH & DEVELOPMENT DIVISION AUTOMOTIVE & REFINEH ORGANIZATION August 1, 1976 R&D MANAGER - AUTOMOTIVE & REFINISH----------------------------------- F.