Popular Science (1872-Present Popular Science Publishing Co.) Vol. 131 #2

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Volume 131, Issue 2 - August, 1938. "Marvels of Underground Oil Railroads", fluid freight flows through a vast network of pipelines. "Why We Enjoy Pain", modern psychology traces common habits to mild forms of self-torture. "Fire-Bug Hunters", how arson sleuths make war on incendiaries. "Musical Magician", a college professor coaxes tunes from odd materials, plus much more. 8.5-in. x 11.5-in., black and white w/spot color, 126 pages. Cover price $0.15.