Document 3NmOZDww9rnoj6yYQ40eRObBy

Be a c o n Oi l Co m pa n y (iN c o H r>o RA . x ED) Ev e r e t t lj!4p| rBosio^MASS. m a n u f a c t u r in g d epa r t m en t H. H. H EW ET SO N , m a n a g e r D r. Rober t A. Keh oe, U n iversity of C in cin n ati, C ollege of M edicin e, Eden and Be t h esd a A v e ., C in c in n a t i, Oh io. IN REPL Y PL E A SE REFER T O Rl-3475-4 Ju ly 6, 1928. Dear D r. lieh oe:- Your l e t t e r o f Ju ly 2nd r e fe r s more or l e s s t o t h e a p p l i c a t i o n o f alum in um p a i n t s, and in asm uch a s t h e c o n d it io n s you h ave o u t lin e d v a r y somewhat from t h e c o n d it io n s u n d er w h ich we h ave t o w ork, I t h ou gh t I w ou ld c a l l same t o y ou r a t t e n t i o n , so t h a t i f you h ave an y fu r t h e r t h o u gh t s in t h e m a t t e r , you m igh t w r it e t o me r e g a r d in g sam e. The meth od w h ich we employ in ap p ly in g aluminum t o m et al su r fa c e s t o gu ar d a g a in st c o r r o sio n c o n sist s in fe e d in g an aluminum w ir e t h r ou gh a gun in w h ich t h e alum in um 'w ire i s m e lt e d in an o x y - a c e t y le n e flam ed an d d e p o sit e d on t h e su r face to be coated , in a m olten st a t e . t t yi s p o ssib le t h a t , t h e r e i s a c e r t a in amount o f vap or in th e atm osph ere d u r in g t h i s o p e r at io n o f m e lt in g aluminum a t v er y h igh te m p er at u r e ' fo r th e pu rpose o f sp r ay in g an d, con seq u en tly , th er e w ill be n on e o f t h e so lv e n t s p r e se n t t o 'wh ich you r e f e r in t h e f i r s t paragraph of your le t t e r . '"i t h r e fe r e n c e t o you r su g g e st io n r e g a r d in g t h e means o f p r o t e c t in g w o r k er s, I can r e a d ily see t h a t you r ' t h o u gh t s ap p ly v ar y p r a c t i c a l l y t o sp r ay in g o f sm all drum s. In ou r p a r t i c u l a r c a s e , h ow ever, t h e drum w h ich a men h as t o _ . sp r a y i s a v e r y l a r g e v e s s e l an d t h e o p e r a t o r h as t o go i n si d e t h i s v e s s e l an d c o a t t h e in n e r s u r f a c e s . Vire ar e c o a t in g t h e in sid e o f soak in g drums t o p r ev en t c o r r o sio n from th e in sid e an d t h e se drums a r e 6 f t . in d iam e t e r by 40 f t . lo n g . You can r e a d ily se e t h a t th e o p e r at io n i s q u it e d iffe r e n t from th e one w h ich you o u t lin e an d t h a t t h e c o n d it io n s su r r o u n d in g same r e a l l y n e c e s s i t a t e t h e u se o f a p r e ssu r e t y p e mask ohd t h a t t h e l i k l i h o o d o f any p o iso n in g w ould on ly be due to aluminum i t s e l f i Th ank you v e r y much f o r y ou r k in d r e p ly ( o Ii .Ti m I (m> N22365 010 cz