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Brunel and the Seven-Foot Gage

How the Law May Prevent Railroad Accidents


Another Long-Distance Transmission in California

We Build a Locomotive on the Metric System

A Telephone Newspaper

By W. G. Fitz-Gerald

Automobile Races and Record Runs

Result of the Motor Boat Race to Bermuda

The Government Tests of Submarines

The Wellman Polar Airship Expedition

By the Paris Correspondent of the Scientific American

Double-Deck Streets as a Relief for Traffic Congestion

The Art and Craft of the Medalist

By Victor D. Brenner

Mechanical Masterpieces of the Eighteenth Century

By Alfred Gradenwitz

An Artificial Respirator

By John W. Hall

Do Animals Reason?

By L. A. Camacho

Novel Safety Razor

Spark-Producing Mechanism for Explosion Engines

An Improved Clothes Line Hanger

A Novel Pneumatic Massage Machine


  • Departments


  • Notes and Queries

  • Recently Patented Inventions

  • New Books, Etc.

  • Index of Inventions

  • Patents

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June 22, 1907

Of Shamrocks and Science

Happy St. Patrick’s Day