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Features

A Noble Presidential Precedent, How Fast do Birds Fly?, Important Patent Legislation

Electricity, Science, Aeronautics

A Giant Junk Yard

A Plant that Handles Anything from Discarded Battleships and Abandoned Railroads to Old Tin Cans

By William A. McGarry

A Radio Link in Our Telephone System

By Frank B. Howe

Making Satisfactory Glass from American Clays

By S. R. Winters

Hydraulic Power Under a Mile-High Head

Some Interesting Details of a Remarkable Pelton-Wheel Installation in Switzerland

Science Coming into its Own

The National Research Council and Other Research Organizations and Some of Their Achievements

By Charles Frederick Carter

A Chat with Madame Curie

What the Discoverer of Radium Thinks of Us and What We Think of Her

By Austin C. Lescarboura

Weapons at Sea

The Place of Aircraft and the Battleship

By E. G. Allen

Lightning

A Brief Statement of Its Nature, with Some Figures and Some Photographs

By Jerome Lachenbruch

Counting Bacteria

By J. Boyer

Daylight Projection of Opaque Subjects

By George Gaulois

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July 1921

See the World from a Different Perspective

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