Document kakEBLMO2dbMMN311jYXOq2dB

AREA CODE j4l1, 2 -- PPHHOONNE: 241- 5900 201 N O RT H BRA D D O C K A V EN U E FITTSBOTCT , FA. January 10, 196^ CABLE '"'MMIINNSSA F"" PITTSBURGH Kettering Laboratory University of Cincinnati Cincinnati, Ohio Gentlemen: - We are trying to determine if a maximum allowable concentration for' lead acetate has been established. To date, our efforts have been unsuccessful. Is it possible that you could assist us on this point? As a matter of general Knowledge, would it be feasible to use the MAC of lead for those compounds of lead for which no limit has been set? We shall appreciate hearing from you at the address below. Very truly yours, (Miss) Hilda M. Reitzel Librarian HMR:ejh - MAILING ADDRESS The Library Mine Safety Appliances Company J. T. Ryan Memorial Laboratory 100 North Braddock Avenue Pittsburgh, Pennsylvania 15208 N 6255