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Features

Experiments with the Langley Aerodrome

By S. P. Langley

The Scientific Lantern

Electric Ignition Systems

By E. W. Roberts

Electrically-Heated Carbon Tube Furnaces

By R. S. Hutton and W. H. Patterson

The Latest Performances of Typical French, English, and American Airships

Motor Cycle Race for International Cup

By the Paris Correspondent of Scientific American

Forty-Horse-Power Gasoline Tractor for the British War Office

Some Problems in Steam Turbine Design

Electric Power from Blast Furnaces

By P. Eyermann

Counterfeit Relics

Precious Metals Recovered by Cyanide Processes

By Charles E. Munroe

The Construction of a Silvered Glass Telescope, Fifteen and a Half Inches in Aperture, and its use in Celestial Photography.—IV

By Henry Draper

Engineering Notes

Trade Notes and Recipes

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    August 19, 1905

    Think Outside the Gift Box