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Features

Dirigible Airships

By Count von Zeppelin

The Kobusch-Wagenhals Steam Motor Coach

The Electrothermal Metallurgy of Iron

By E. Stassano

Greater Economy needed in the Production of Compressed Air

Heraldry in Relation to the Applied Arts

The Weed Fields

By B. S. Bowdish

Gas as a Source of Power.—II

Generation of Producer, Mond and Blast Furnace Gases

By Willard L. Case

The “Ados” Automatic Co2 Recorder for Boiler Furnaces

The Agricultural Divisions of the World

Are Crystals Alive?

The Measurement of Resemblance

By Francis Galton

Electrical Notes

Engineering Notes

Geometry of the Hindus

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    December 22, 1906

    Think Outside the Gift Box