Document vBJj4J6bxjeJka49YxMQQ76p9

Thz Sa^lnac Labqkato&t k* tkx Study or TuMaucuiosa 11 THX SDWAftD u 09 tamseAU fCUKSAtm SaaakacUj^N.Y. Jsaaury SI* 1936 Ur* 5* C* Barnes Westlnghouse Electric Company Baat-Pittaburgh, Pa. Dear' nea: In my remarks before the Konlclde Club group I mentioned the feet that Tltreoue silica, as well as all the other forma of 3102* had proved to be biologically active* I qualified these remarks by stating that we had no information as to the rate of reaction to these different substances* That* obviously* is the next step to undertake* Our results up to now are based upon matlHMi quantities and we shall proceed to find out* if possible,'whether there are differences in the capacity of various foma of silica to produce reaction* LUOsCC Leroy U. Gardner, U*D* Director