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February 1942. Akron, Ohio. "Conversion. Beverage containers to aviation oxygen cylinders. Removal from solution tank at a rubber factory now producing metal essential for the Army. This bath, which follows the removal of the weld scale, gives the inside of the cylinder a further cleaning and removes all chemicals which may remain from the previous operation." 4x5 nitrate negative by Alfred Palmer for the Office of War Information. View full size.