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Features

The Harriman Medals for Rail Safety

Volcanology

What Is Being Done to Make the Observation of the Earth's Internal Fluids an Experimental Science

By T. A. Jaggar

Why Stars Twinkle

By Henry Norris Russell

The America's Cup Defenders

By Herbert L. Stone

Crash-Testing Tires at High Speed

Our Patent System

The Use and Abuse of Patent Rights

By Orson D. Munn

More About the Peking Man

By G. Elliot Smith

Arcs of Art

The Camera Analyzes the Electric Arc

By Hendley N. Blackmon

The Pattern of Evolution

A Criticism of Doctor Austin Clark's Thesist

By W. D. Matthew

Modern Rehabilitation of the Cripple

By Albert A. Hopkins

Basic Patents in Evolution--II

By William K. Gregory

A Fish Factory at Sea

Racing Cars of 1930

By William F. Sturm

Mooring Dirigibles Mechanically

New Stub Mast and Other Equipment at Lakehurst Facilitate Mooring and Housing

Chicago's Underground Freight System

Departments

  • Departments

    Across the Editor's Desk, September 1930

  • Back of Frontispiece, September 1930

  • The Vanguard of Progress, September 1930

  • Railroading Today--Construction and Maintenance

  • Our Point of View, August 1930

  • Suspended Observation Car, Door Opens Automatically When Approached and more

  • Current Bulletin Briefs, August 1930

  • Similar Food Trademarks Allowed, Concrete Mixer May Be Beautiful, and more

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September 1930

See the World from a Different Perspective

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