Contents: First Mile a Minute Army takes field for Uncle Sam - the picture story of the new "mechanized cavalry"; New found cannibal germs mighty aid in war on disease; my 10,000 flights in untried planes; how man-apes became men; weird unseen rays trap master crooks; Wonder photos reveal unsuspected facts about shaving; more
1931 October Popular Science Magazine Back-Issue available at www.DadsVintageAds.com
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