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Features

The Ship Subsidy Bill

Evolution of Heat from Radium

The "Dreadnought."

Experimental Evolution

By Hugo De Vries

Reinforced Concrete on the Pacific Coast

By H. A. Crafts

A Gravity Cable Railroad in the Swiss Alps

Detonation of Submarine Mines by Means of Sound Waves

Sand Waves and Their Work

By Day Allen Willey

An Ice Automobile

By G. Luxton

The Inhalatorium, a New Medical Institution

Training Wall

Combination Chair and Life Preserver

Business and Personal Wants

Departments

  • Departments

    Correspondence

  • Recently Patented Inventions

  • Notes and Queries

  • Index of Inventions

  • New Books, Etc.

  • Patents

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