Document B5ebLdYpqyn4w71q7vvkgBorJ

M A I N 0 f ( C I AMO PLANT S A N S U S O 12. C A L I F O R N I A V ( R A N C H OP P I C I ANO PLANT H ' i ANO GRANO A Y fM U tS D I 5 M O I N S 5. I O W A T RANCH OPPICI! 6 0 C A S T 4 2 NO S T R I C T N C W r o t i C l T T 17. N . T 1 0 2 5 C O N N E C T I C U T A V | M. W. W A S H I N G T O N 6. 0 . C. 120 WEST S C C O N O STRICT D A Y T O N 2. O H I O 3 3 2 SOUTH M IC H I G A N AVI. C H I C A G O 4. I L L I N O I S w 1 9 * 3 w 41 S H R E l O u i t U l D lEVERir wins. Ca l if o r n ia V c A I LI AD 0 RI S S SOLAR" SOLAR AIRCRAFT COMPANY STA I N L ESS ST EEL P R O D U CT S e S T A B L / Z H f D >$27 PLEASE A D D R E S S REPLY TO I TH ft G R A N O A V E N U E S D es m o in e s 5. lo w * September 29, 19^9 B o b e r t A. Kehoe, M.D. Director K ettering Laboratory of Applied PhysiologyCollege of Medicine U niversity of Cincinnati C in c in n a t i, Chio D ear Dr. Kehoe: This is to request inform ation on c e r ta in m e ta llic d u s ts . We a r e : s e r i o u s l y i n nee d of c o m p le te i n f o r m a t i o n on th e phy s io lo g ic a l and p athological changes incident to the inhala t i o n of Chromium M e t a l l i c Dust, C o b a l t M e t a l l i c Dy.st, M c k e l M e t a l l i c Dust and T i t a n i u m M e t a l l i c D u s t . I n a d d i t i o n , we nee d i n f o r m a t i o n on t h e sjame e f f e c t s of a p r e p a r a t i o n c a l l e d Gem-Blast which is an aluminum "oxide garnet type m a te ria l c o n t a i n i n g some of i t s i m p u r i t i e s such a s i r o n compound which is being used to replace s ili c a sand in sand b la stin g opera tions . Our I n d u s t r i a l Hygiene Committee has been stu d y in g w ith great in te r e s t your contributions to the two-volume publica tio n nI n d u s tr ia l Hygiene and Toxicology" ed ited b7 Prank P a tty . However, there i s l i t t l e inform ation r e l a t i v e to the above m e ta ll ic .d u s ts and aluminum oxide and t h e i r p h y s io lo g ic a l and p a t h o l o g i c a l e f f e c t s . We a r e p a r t i c u l a r l y a l l e r g i c t o t h e p o s s i b i l i t y of a f i b r o s i n g pneumoccft.osis developing in our employees who do e x t e n s i v e g r i n d i n g o p e r a t i o n s on h i g h - h e a t r e s i s t a n t metals of the above composition. We a r e a l s o i n t e r e s t e d t o know i f t h e r e a r e any i l l e ffe c ts from tve in h a la tio n of Beryllium M etallic Dust. t i 00122 R o b e r t A. Kehoe, M.B. - 2. September ?9, 15^+9 I wish to t h a n k you f o r w h a t e v e r i n f o r m a t i o n you may have re la tiv e to the p ro p erties of these dusts or fo r any o th e r sources of in fo rm atio n r e l a t i v e to the same. Sincerely yours, SGLAH AIRCRAFT COMPANY s h s a d , m .d . Medical Director H K 5 :ew /! K&B 0 0 1 2 3