1936 Scientific American April - China Clipper; Great Serpent mound in Ohio;

Scientific American

April 1936

Planes will now cross the Atlantic. China Clipper is on the cover.

Rare

Some of the articles inside are: McMath-Hulbert Observatory at Pontiac MI; Bone surgery with machine tools; The Great serpent mound in Ohio; Minor planets part II; Scrap metal is a big industry; Growth of the use of wood pulp; Trisecting the impossible; Can these vehicles and trucks take it? Amateur Seismology; Stone gear of the Middle Ages;

Lots of ads including trucks and a number of other articles and photos.

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