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Some Celebrated Long-Span Stone Arch Bridges


Novel Power Storage

General Specifications for a Gasoline Motor Car

By H. Ward Leonard

The Hering Variable Speed Gear

The Horse Power of Gas Engines

The Prat Pressure Transformer

The “Boreas” Air Compressor

Petroleum from the Beaumont, Texas, Field

By Clifford Richardson and E. C. Wallace

Contemporary Electrical Science

Electrograph for Atmospheric Discharges

Production of Paints in Ancient Times

The Roze “Aviator”

Luminosity Obtained from Certain Organic Compounds

An Effective Depilatory


By D. J. Cunningham

The Phosphates in Strawberry Culture

A Very Ancient Method of Paddle Propulsion

Japanese Plants in American Gardens

Sorghum Sirup Manufacture

By A. A. Denton

Trade Suggestions from United States Consuls

Trade Notes and Receipts


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