Document jBg3z4ymwM7Bdd2ZN1z0XEMd5

EXPERIHEHT1L HCRX - SARAKAC IABORATCET grinding Dust Exposure go. Laboratory Animals Deoember 24, 1946 Hr* t, Sunn, Treasurer Hew York Gffloe Enclosed herewith is a report covering the first 10 Booths of our experimental work which Dr* Gardner was doing for us at Saranac Lake* Ton will note that in each of the groups of animals exposed to dust over an 8 to 10 south period* the findings as far as production of fibrosis in the lungs is oonoerned, are essentially negative* In other words the experiment thus far warrants a tentative conclusion that the dust exposure in our grinding operations while producing changes observed in'the x-ray film is a relatively Inert dust* This substantiates sy original impression that the undulations we have seen are not due to true silicosis but . are similar to the changes observed In lungs of persons exposed to iron dust. It is of course too soon to draw any definite conclusions but the implications are very encouraging and very satisfying to me* After we have had a ahaaoe to observe the results, over the next period of months X feel that we will be in a position to definitely^state that we ere not dealing with silicosis but a non-disabling ciderosis. You will also nets Paragraph 4 which so far indicates that the-animals vhich j: have been infected with tuberculosis and then dusted show no appreciable difference* In other words the spread of infection is apparently not accelerated by the Inhalation of this dust during the 8 months* period stu^y* t 1 feel that we should consider the money spent in this experimental work to be a very definite contribution to our knowledge of duat diseases audone that I think will have far reaching effects not only as far as Brake Shoe is oonoemed but through the industrial world tin general. X think that you and Sr* Given and others concerned in making this experimental work possible deserve a great deal of credit for tout foresight and cooperation in making this study possible* When the experimshta^vork has been completed, 1 plan to write it up in detail and publish the story* Thu will not be* of course* for some months yet %S&.-nothing will be published without year approval* 1 will let you know as soon as we have any more results* DEHmp Enclosure L. E. Hamlin, K*D. lied leal Director SPNY 000434