Original World War 2 business industry trade magazine vintage ad for P. R. MALLORY AND COMPANY, INC. of Indianapolis, IN.  From Out of the Hopper of War Production Ideas Will Pop for You.  Cooperative progress in techniques, chemical, metallurgical and electrical applications of materials, synthesizing new materials, has contributed astounding gains to man's control over Nature's resources.  Old 1943 WW2 wartime era propaganda magazine advertisement.