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Features

The Tortosa Astronomical Observatory

The Construction of the Heavens

By Hector Macpherson

New Low Temperature Phenomena

By James Dewar

Tinning.—IV

Tinning of Copper and Brass

Greek Jewelry

Output of Electric Generators

Grenades and Grenadiers

The Propagation of Butterflies and Moths under Artificial Temperature Conditions

By M. Standfuss

The Decker Primary Battery

By Francis B. Crocker

Electric Railway Developments

The Bagdad Railway

Electrical Notes

Engineering Notes

Trade Notes and Formulæ

Departments

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    October 13, 1906

    Think Outside the Gift Box