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Rays of Positive Electricity

A New Investigation of Goldstein's “Canal Rays”

By J. J. Thomson

Illuminated Street Sweepers

A New Method in Reinforced Concrete Flooring

Aerial Locomotion in Warfare

The Military Possibilities of the Aeroplane and Airship

By George O. Squier

A Concrete Coal Mine Shaft

A New Way of Reaching Inaccessible Veins

By Day Allen Willey

Theory of Electrons

By Oliver Lodge

Action of Radium on Distilled Water

The Potent Chemical Effect of a Newly Discovered Gas

By William Ramsay

Destructive Marine Wood Borers

Various Methods of Protecting Timber Structures

By Charles. M. Ripley

The Tarring of Roads

How the Work his Done

By Prevost Hubbard


Electrical Notes

Engineering Notes

Trade Notes and Formulæ


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    January 02, 1909

    Science for the Modern World