Document p2pVE3LbYN3vZoK2BxmwmN80a

Anthony J. Laasa, 1.0* Assistant Medical Director Metropolitan Life Insur-nee Company 1 Maaison Avenue Mew lone. Hew Xork Dear Tony* Thunk you for your note of December Situ X find that we also have a- copy of Solvents8 by Durruns ana, Judging *roa its well thumbed appearance, it is a useful teas* Ion will recall that we have a Dust and fuse Code Committee wnicu ic engaged in setting up n metcum .uL.aahl8 ccacentratijus for duste and fumes. As to silica dusty we &re planning to follow tne recommendations of your Hcdical Committee of tns Jutionnl Siiicouis Conference and cur figures on the various innustriai fumes are those which X saosed you the other day* fills asbestos is at present no very important factor in Ma aacousett3 induatry, X feel that we should nevertheless set up some sort of a figure for it and X would be very gratefu- if you rould be willing to giro me your anvico on this* Xou will no doubt feel that this is Just wnat you don't want to do, but X hope that you will be a gooc guy newer* thelesa and give me at least wnat you regard as a "best guess8* X had quite a talk today with Bradley Dewey, president of the Dewey St A_ay Chemical Company, was formerly oread the Multioestos Company, tne concern about whole former employees Dr* Hawes has recently so eloquently written* X mentioned to din Eoy Gardner's opinion that asbestosia ia definitely not progresoiTe and waa quite surprised to have hia take pretty definite issue with this* He gave it as his opinion that ths four principal types of asbestos, Canadian, Russian,*' Rhodesian and African, varied markedly in their pulmonary effect and he thought that tne results of experiments with one type could not hold for another* Dewey is a highly intelligent chap and definitely one of the leaders in industrial chemistry In this country^ also. Incidentally, an X'-colonel in the Chemical Warfare Service* Xf you nave any dope 'den would be interesting in reply to his theory about the different typea of asbestos, X *ou_ln be more toon glad to be able to transmit it to him* Sincerely, MS ZB Manfred Bowdltch Director evuiorr ~7