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Features

The Pneumatic Motor for Surface Roads

By Herman Haupt

Oil Engine and Launch

A Short History of Bridge Building

By C. R. Manners

Mirror for Laying out Straight Lines

Lamp Black and Bone Black

By Henry J. Williams

Blue Brass

Decorticating Ramie

A Fatal Thunderbolt at Bourges, France

Insulation

By Thomas A. Edison

The Cyanide Process for Working Gold and Silver ores without Amalgamation

The Macarthur Metallurgical Filter

Long-Tailed Japanese Fowls

Rat Catching

A London Ivory Sale

On the Uncertainty of Conclusions

By T. C. Mendenhall

The Fourth Centenary of Columbus

Mental Evolution in Man and the Lower Animals

By Alice Bodington

Improved Mean Time Sun Dial

Rose-Covered Porches

Patents

Action of Nitric Oxide upon the Metals and Metallic Oxides

By Paul Sabatier and J. B. Senderens

Useful Engineering Books

A New Gaseous Incandescent Lamp

By H. N. Warren

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