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A New 1,000 Unit Machine for Electric Supply

The Arc Light


By Professor Silvanus P. Thompson

The Electric Cable Railway of the Stanserhorn, in Switzerland

An Inextinguishable Coal Mine Fire

The Sewers of Paris—A Siphon under the Seine

Defenses of Constantinople

The Improvement of London

Notes on Gold Milling in California

By Ed. B. Preston

Specifications for a Forty-Stamp Gold Mill (Water Power)


A Wonderful Balloon Voyage during the Siege of Paris, 1870

The Technical Literature of the Year

Large Bells

The Forensic Aspect of Hypnotism

By H. Gerald Chapin

The French Method of Treatment for Electric Shock


The Parachute Ball


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