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Features

The New Power House at Niagara Falls

By Orrin E. Dunlap

The Oldest Book in the World

Contemporary Electrical Science

The Serpollet Steam Automobile

Domestic Life in India

By John David Rees

Electricity and the Food Problem

The Tetrahedral Principle in Kite Structure

By Alexander Graham Bell

On Electrons

By Oliver Lodge

The Mystery of Radio-Activity

An Old Pelican Myth Exploded

Parasitic Hymenoptera

An Elizabethan Army

By R. M. Holden

New Food for Live Stock in Germany

Trade Notes and Recipes

Explorations of Dr. Sven Hedin in Central Asia (1899-1902)

Trade Suggestions from United States Consuls

Selected Formulæ

Patents!

Departments

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