Document xzw0zyY6RDM24q9qkQ5LxQNeJ

PRATT AND WHITNEY AIRCRAFT E a st % r t f o r d , Conn. C 0 p Y Ju ly 26, 1938. Eth yl Gasolin e Corporation D e t r o it , Mich igan A t t e n t io n : Mr. S.D , Heron Gen t lem en : As a p r e c a u t io n we h ave i n s t a l l e d a blow er on our sp ar k p lu g r e c o n d it io n in g ben ch t o p u ll th e d u st from t h e cle an in g ap p ar atu s and d isch ar ge th rough th e r o o f o f th e b u ild in g, I am in c lo sin g a sam ple o f t h i s d u st and w on der w h eth er you would p le a se an alyze i t and r e p o r t whether o r n ot t h er e m igh t be a h ealth h azard connected w ith t h is jo b . Th an kin g you fo r an y comments you m igh t c a r e t o m ake. Vexy t r u l y y o u r s, PRATT AND WHITNEY AIRCRAFT (Sign ed ) S . J. Bu ssey Gen er al Su p er in t en d en t Experim en tal T est Department E JB :a In c. KE 0009094