Document DGBOY55pDn2d58p1br26vroRM

KHAsacy l MUTTifOM Company MA.II. &ANwcTMei*e e* sms ammn* reeewsts sne sai* KK9t l. MHinVNIA lame 2, 1943 UU Ha. 2S80 W. W. 7. Shepfcerd, Xsq. Turner k Newell I.t-3. SpetlasyS, Rsjofadtle Dear Mr, Sn ph erd s SKibJeat: Dr, Lerof U. Gardner's Asbestos Dust Experiments Tfeank you for your letter* TfcH Ho, 2484, of May l$th eaelOBing copy of Dr, Francis* mete* mrlttsa after perusal of tbe outline of the proposal moaogreph My Dr. Oardaer. I am sending a copy of Dr. Freneie* netee to Dr. Geriner acd top* to Mara hi* reply wlttita * reasonable period of time, aft*** which I will of eouraa send It along to you. Am yet X bar* act received Dr. Oar^nar* a fine! report end an lvdy writing to ft ad out &*a we aay expeet to hava It Itt cur hernia.. - ^tbuipe sincerely, - 'l tfASart k MATTISOM CGMPAHY : ok C`->r/ ?:.? boat o PLAINTIFFS EXHIBIT c0-\ P\ I\ THJ5 8AIUJUC LABORATORY FOR THB STUD! Of TUBERCULOSIS of the Kdward L. Trudeau Foundation Saranac I*k, a. Y. - June 9, 1943 Mr. TandltarNBroTO, Secretary Johr.s-Maavl 11 Corporation 22 last 40th Street n Hew York, gem Y^rk (LX* Dear Hr. Browni \ / X k pleased to ambscit th foUcalftc,eow*U on Dr. Fra celae pertinent qtfestlomm about our 4xpe finance upon axbsato- sls. H is cerreot in assuming that ths points will be diseassed in th forthcoming publication but for hi benefit I will amplify thorn at tha present tin* Tha differences that a have observed between Bolivian and South African hlui asbestc-s / not apply generally to commercial products. V worked /'only with small samples furnished us by Profes sor Larsen of th Hakvarm Department of Mine mingy, which he had selected because of/their, purlty. In these particular samel** U*e differences in flbb# flexibility wr very obviousj tha Bolivian material being composed of\ a bundle of straight, stiff fibres ever 3 inch*s long while th Bodth A-frlcen sample was a block of mineral from which the floras could\ba scraped off as fluffy mass of flue fibre. In our effort to determine th# effect of very pure substance* wo may have deflated on of bur purposes. nevertheless, l truit that the further ex/srlments stilly in progress with the latter type of asbestos may establish th Importance of fibre flexibility la the production ofj pulmonary fibrous. / . .Th question of 'tuberculoa 1# In association with as bestos Is gne - tha t has bean I004 discussed. All observers have been impressed ;4ltb the very pbvloua Slffer^rnce* In th lpcldeoce of t^l# infectlon ln American and Yngllsh.asbeato* fabricator*. i'bmve corresponds/ with Dr. Mereweather aboQt this subject for many years and on the Occasion of his recent visit to this eountry wa discussed the matter at grant length. 0alike sl.isoais, which is universally *soclat/d with an xcsaiv lucid#me of tuberculosis, asbestoals Is apparently so complicated only in certain locations. ' la the Doited States surveys of asbestos workers havs never rmvesled an usual fre quency of this Infection. In Quebec th fete* are high but as far as one /can learn they do nut surpass the generally high rat for that province. In fingland, the Incidence of tuberculosis in asbestos fa* to/ies is generally accepted as excessive th basis for bellf is 1/rgely post mortem material. I know of no Report baaed upon roentgei ^graphic surveys of large groups of living employees. While autopsy ()