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SA Supplements Vol 46 Issue 1185supp

SA Supplements

Volume 46, Issue 1185supp

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Features

A Day in the Chief Fire “Watch” of Berlin

Lava Eruptions in Hawaii

The Wear of Chains

R. Weatherburn

The Whirling Spiral

A New Centering Tool

“Trolley Systems—Their Value in Foundry Work”

Herbert M. Ramp

The Port of Liverpool

Vertical Duplex Gas Engine

The Hardening and Tempering of Steel

Central Station Statistics

Electric Heating and its Applications

Engineering Notes

Electrical Notes

Selected Formulæ

Exports of German Aniline Colors

General Blanco

The Holsten Thor in Lübeck

American Competition from an English Standpoint

Some Forms of Filarlle

G. Archie Stockwell

Glacial Geology in America

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

Patents!