Features
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
A Strange Trick Explained
Departments
- Departments
Inventions New and Interesting - October 25, 1919
