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A New Problem and Its Solution

A New Process for the Commercial Utilization of Atmospheric Nitrogen

Huge Proportions of the New Government Irrigation Dams

Success of the Independent Railway Motor Car

The Caliber of a Gun

Carbon Dioxide Pockets in France

A New Wireless Telephone

How to Study Industrial Chemistry

Action of Radium on Organisms

A New 30,000-Horse-Power Plant at Niagara Falls

By Orrin E. Dunlap

Archdeacon's Air-Propelled Motor Bicycle

By the Paris Correspondent of the Scientific American

Automatic Device for Turning off the Gas

Masks of Classic and Modern Times,--I

By Randolph I. Geare

The "R. C. Rickmers"—The Largest Sailing Ship Afloat

The Birkeland-Eyde Process and the Artificial Production of Nitrates from the Atmosphere

By M. Alger

Business and Personal Wants


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    Recently Patented Inventions

  • Index of Inventions

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