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A Word About This Issue

A Fresh Deal for the Electric Car

Getting More Miles out of a Gallon of Gasoline

The Fusion of Tungsten

A New German Process for Working the Obstinate Metal

Preserving without Sugar

A Study of the Antiseptic Properties of Cold Water

The Gas Mask in Industry

The Bureau of Mines Tells What it Will Do and What it Will Not Do

The Story of the Bartram Oak

How a Little Exact Experimental Science Solved a Problem of Long Standing

By Arthur Hollick

A Strange Trick Explained


  • Departments

    Inventions New and Interesting - October 25, 1919

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