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Features

A Decision Under the German-American Patent Treaty

The Cherry Mine Disaster

High and Cross-Country Flying Abroad

Electricity

Science

Engineering

Some Photographic Diversions

By Gustave Michaud

How Does Sap Run in Pine Trees?

Safeguarding Mines

An Early Marine Engine

A Novel Aerial Railway

How to Observe and Record the Weather

By Thaleon Blake

Testing the Man-Engine

By John Elfreth Watkins

Coin-Operated Device for Registering Letters

Curiosities in Science and Invention

The Great Stone Globe at Swanage

An Early Type of Submarine Boat

The Ice Drag of the Wellman Expedition

Spray Helmet for Firemen

Indoor Bed Tents

By Katherine Louise Smith

An Emergency Oxygen Cup for Miners

By Frederic B. Hyde

Departments

  • Departments

    Correspondence

  • The Heavens in December

  • Recently Patented Inventions

  • Notes and Queries

  • Patents

  • Index of Inventions

  • New Books, Etc.

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