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Features

A City of Towers

Electric Traction Vindicated

Metallic Sodium as a Conductor for Electric Currents

Naval Marksmanship

The Death of Pierre Berthelot

The Gasoline Motor in Shallow-Draft Vessels

By the Engliish Correspondent of the Scientific American

New French Aeroplanes

An Optical Illusion

By Gustave Michaud

A Twentieth Century Campanile

Excavations at Naga-Ed-Der, Where Prehistoric Man First Settled in Egypt

By Enos Brown

A New High-Speed Photographic Shutter

An Improved Concrete Wall Construction

A New Rifle Sight

Carpet Stretcher

A Novel Flag Holder

Dish Drainer

Oddities in Inventions

Safety Cock

An Improved Bit Brace

Electric Gas-Lighter for Acetylene Automobile Lamps

Departments

  • Departments

    The Heavens in April

  • Correspondence - March 30, 1907

  • Recently Patented Inventions - March 30, 1907

  • Notes and Queries - March 30, 1907

  • Index of Inventions - March 30, 1907

  • Patents - March 30, 1907

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Dwindling Supply. Increasing Demand.

Dwindling Supply. Increasing Demand.

Solving the Water Crisis