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The Utilization of 110 Volt Electric Circuits for Small Furnace Work

Accompanied by DE't'ailed instructions for the Production of Calcium Carbide and Other. directions and working notes

By Nevil Monroe Hopkins

Our Knowledge of the Value of a Resistance

By W. E. Ayrton

An American Smokeless Powder

By Frederick H Mcgahie

Library Schools

Throwing Sticks

Profitable Toilet Preparations

New Constituent of Atmospheric air

By William Ramsay and M. W. Travers

The Reeves Twin Feed-Water Filter

A Smoke Detector

By R. M. Haseltine

The De Laval High Pressure Steam Boiler and Turbine

Combined Engines and Fans for the Admiralty

The Performance of the “Oregon's” Engines on their Great Run of 15,000 Knots

Engineering Notes

Selected Formulæ

Miscellaneous Notes

A Registering Solar Radiometer and Sunshine Recorder

By George S. Isham

Physics without Apparatus—The Dice and Box

Natural History of the Locust

Treatment of the Surface of Medals

Photographic Surveying

Gutta Percha and India Rubber

A Classic Legacy of Agriculture

By John Mills

Japanese Arrangement of Flowers



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