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Features

A Day in the Chief Fire “Watch” of Berlin

The Wear of Chains

By R. Weatherburn

Lava Eruptions in Hawaii

The Whirling Spiral

A New Centering Tool

The Port of Liverpool

“Trolley Systems—Their Value in Foundry Work”

By Herbert M. Ramp

Vertical Duplex Gas Engine

The Hardening and Tempering of Steel

Central Station Statistics

Electric Heating and its Applications

Engineering Notes

Selected Formulæ

Electrical Notes

Exports of German Aniline Colors

General Blanco

American Competition from an English Standpoint

The Holsten Thor in Lübeck

Some Forms of Filarlle

By G. Archie Stockwell

Glacial Geology in America

By Herman L. Fairchild

The Cultivation of Saffron

A Hunting Expedition in the Altai Mountains

Apparatus for Estimating Marsh Gas and Carbon Dioxide in Pit Gases

The Development of Pure Food Legislation

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