Document vrr233Vx5xVXY4az9MGopXR9

P e r so n al and C o n fid e n t ia l May 1 0 , 1938 Dr. George C a lin g a e r t Eth yl Gasolin e Corporation 723 E a s t Milw aukee Avenue D etr o11 , Mich igan Dear Cal:-* Thanks fo r your l e t t e r of A p r il 2i$nd and f o r th e in fo r m at io n w h ich you h ave car e fu lly ou tlin ed in i t . Proceedin g to your la st q u estion , I th in k your calcu lat io n s ar e su ffic ie n t to provide a proper b a sis fo r our se le ct io n of a m ater ial fo r our experim en tation w ith out b e n e fit of actu al ex perim en tal d eterm in ation s. In con firm ation of our teleph on e con versation of l a s t week, t h is is to l e t you know t h a t In my op in ion i t i s a d v isa b le t o u se a m a t e r ia l t h a t w i l l allo w u s to a n t i c i p a t e some f a c t o r o f sa f e t y in con n ect ion w ith t h e u se o f a new can poun d. W ith t h i s id e a in m in d , I t h in k we sh ou ld t ak e n e it h e r th e w o r st n or th e b e s t of th e compounds from th e p o in t o f view o f h a z ar d s a n t ic ip a t e d on th e b a s i s of vap or p r e ssu r e s. I b e lie v e t h a t le a d mix No.H-501 would p r ovid e us w ith a s a t i s fa c t o r y m a t e r ia l. I do n ot mind p u t t in g on p ap er my r e a so n s fo r t h i3 ch o ice i f you w ish me t o do so , bu t I assu r e you t h a t t h is i s n ot th e r e su lt of a b lin d ch o ice b u t i s made r a t h e r w ith c o n sid e r a t io n o f a number o f im p or t an t f a c t o r s . Sin ce r e ly you rs. RAKis Soberfc A. Keh oe, ' ' M.li). K 001S268