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A Swedish Challenge for the Cup

The Formula and the Testing Machine

Ambitious Scheme of Electrification

Our Stupendous Railroad System

The So-Called Hypnotic Influence of Snakes

By Thomas C. Butten

The Electrical Show at Madison Square Garden

A New System for the Fixation of Atmospheric Nitrogen

By F. Savorgnan Di Brazza

Why the Quebec Bridge Failed

The Gammeter Orthopter-A Beating-Wing Flying Machine

By H. C. Gammeter

A Strong Home-Made Turnbuckle

By L. W. M'Caughrey

War Cars, Ancient and Modern

By C. Field

A Universal Astronomical Clock

By Alfred Gradenwitz

Blood Pressure and Mental Conditions

Gas and Coke from Crude Oil

By Willam H. Knight


  • Departments


  • Index of Inventions

  • Notes and Queries

  • Recently Patented Inventions

  • Patents

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