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Features

The Davis Island Dam on the Ohio River, Pittsburg, Pa

General Questions Regarding the use of the Westinghouse Air Brake and Train Signal

The Copper Resources of the United States

By James Douglas

New British Cruisers

The French War Ship Jean Bart

Automatic Apparatus for Preventing Boiler Incrustation

Soap for Wool Washing

The Adaptation of Stoneware to Chemical Apparatus

By W. P. Rix

Electric Discharge in Vacuum Tubes

By J. J. Thomson

The Faraday Centenary

An Electrolytic Process for Silver and Copper Ores

International Bicycle Race from Bordeaux to Paris

Velocities of the Ions

By W. C. D. Whetham

Compressibility of Liquids

By S. Skinner

The Royal Society Conversazione

The Electromagnet in Eye Surgery

By Silvanus P. Thompson and J. Tatham Thompson

The Reactions in the Aluminum Electrolytic Process

Astronomical Photography

Useful Engineering Books

Building Plans and Specifications

The Light from Burning Sodium

Departments

  • Departments

    Patents- August 1, 1891

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Know Before You Vote

Know Before You Vote