Document zo173LNE5ZayNGXpkvwD5nz3B

\ $ 19 December 27* 19*3 Mr . 0. B. Levi s , Et hyl Cor por at i on, Chr ys l er Bui l di ng, Hev Yor k Gi t y 17. tDear Mr * Levi s At t ent i oni Mr . F. M. Fer r y I n r epl y t o your l et t er of December 3, t he appar ent di f f i cul t i es concer ned vi t h t ank cl eani ng at t he R. C. A. F. s t at i on at Hi gh Fi ver , Al ber t a, pr obabl y r es ul t ed f r om i nadequat e vent i l at i on vi t h di mi ni s hed oxygen s uppl y and i ncr eas ed car bon di oxi de cont ent of t he ai r . At mos pher i c condi t i ons of t hi s nat ur e coul d r eadi l y pr oduce s ympt oms compl ai ned of by t he men. Ver y t r ul y your s , KVK ef &. "V. ki t zm' i l l er , M. D. K 0016245