Document ypLaXoYDbm3QE8dwBNB9OX793

/ June 1, 1950 Hr. V. G fiaaard Industrial Balatioae Division Cveuo-Illiaois Glass Coapeny Toledo 1, Ohio Deer Bills The Trtidsaa School currently In session prevented a More prompt answer to your letter of Hay 18. It finished today end I am nov ready to attack the accumulated correspondence* In reviewing your letter the first order of business Is to urge you and Doctor Shook to visit Saranag Lake* Hy calendar is fhll up to ths middle of Jane* Select any time after that data which is most convenient for both of you* The eecood point vfcich you raise relates to ths X-Ray Department end the terries by the foundation for the reading and Interpretation of chest roentgenograms of your employees* In consenting upon this matter as requested in your letter of April 3, there is certainly no objection on oar pert should you prefer that the matter be formalised on a contract basis* In many respects, soma formal agreement wold ease our administrative duties* I rather expect also that it mould satisfy your purchasing department* The agreement of last year vac based on a flat rate of $4*00 per chest ease* la explanation, per chest oase refers to the roentgenograms of eaeb asm at a given date* Thus, the ease might consist of only a single film, or it sight include a stereo pair, a lateral, and as oblique* The fee of $4*00 would cover the entire lot* If on ths other hand two datea were involved, we would consider that as two rases* Ye see no reason to change that fee, unless there it eeee otye* tlcn os the part of the company* It is indeed a relatively low figure and we keep it there only because of our continued interest in problmes relating to the inhaletlrm of dust* TNa opportunity to study clinical aaterlal of this sort is of tremendous help in onr< research program* Mr* V* G* Hasard -2- June 1, 1950 Tba third point concerns the ttptriwnUl investigations vith Xaylo which are about completed* Only a fev more aalali rwms1n Theewill be eacrlfloed next month* then ve will be ready to prepare the final report* Tor your information, at thia tine, 1 believe tike findings permit the following! . Kaylo duet an inhalation by experimental **m*i doe* not produce silicosis Irrespective of the small amount of quarts present* It does produce the asboatotle type of re action in the lungs and, therefore, ve believe every precaution should be taken to minimise exposure of industrial employees* Caylo dost on inhalation by experimental ***1 in fected with tubercle bacilli (& ) produces only a very stimulation of the tuberculous infection, much less than that caused by the inhalation of pure quarts* Thia evidence leads us to believe that in industrial practice the minimal allow able concentration of Kaylo could be far in excess than that accepted for quarts before Xaylo mould have an edvarse stimu lating effect upon a tuberculous Infection in exposed employees* This evidence mould support the view that inhalation of Xaylo dust mould not be hasardous from the standpoint of tuberculosis, especially provided that the dust hasard is controlled^ as cited sbove* Ve are Socking forward to having you and Doctor Shook vlth us the latter part of June* Sincerely yours UYstv Arthur J* fervald, K*D* Director