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Features

The First Transmission of Energy in Europe by means of Triphase Currents

By Emile Guarini

Advances in the Electro-Metallurgy of Iron

Testing the Specula of Reflecting Telescopes

A Correction of a Well-Known Formula

By James Alexander Smith

Use of the Incandescent Mantle in Lighthouses

A Silent Metronome

Sewage Purification Plants for Summer Cottages

By John W. Alvord

Engineering Subjects at the British Association: A Retrospect

An English Edison Battery Test

The Jenatzy Electrical Transmission

The Cow as an Ivory Producer

English Experiments in Coal-Dust Explosions

Mekarski System of Compressed-Air Locomotives as used on Suburban Lines in Paris

By Our Paris Correspondent

The Mosquito Plant

Tropical Trees in California

By Charles F. Holder

Industrial Schools in Germany

Sugar Supply of the United States

By D. G. Purse

The Transportation of Live Fish

Mongolia and the Mongolians

Producing Helium from Radium

Electrical Notes

Trade Notes and Recipes

Engineering Notes

Trade Suggestions from United States Consuls

Selected Formulæ

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October 17, 1903

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