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The Tortosa Astronomical Observatory

The Construction of the Heavens

By Hector Macpherson

New Low Temperature Phenomena

By James Dewar


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

The Bagdad Railway

Electric Railway Developments

Engineering Notes

Electrical Notes

Trade Notes and Formulæ


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    October 13, 1906

    Science for the Modern World