Brunel and the Seven-Foot Gage

How the Law May Prevent Railroad Accidents

Tinol

Another Long-Distance Transmission in California

We Build a Locomotive on the Metric System

A Telephone Newspaper

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

Mechanical Masterpieces of the Eighteenth Century

An Artificial Respirator

Do Animals Reason?

Novel Safety Razor

Spark-Producing Mechanism for Explosion Engines

An Improved Clothes Line Hanger

A Novel Pneumatic Massage Machine