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Comparative Tests of Steam and Electric Locomotives

Proper Methods in Conducting Painting Tests


By F. Mollwo Perkin

The Cerebotani Autotelegraph

The Belgian Correspondent Of Scientific American

The Zoelly Steam Turbine

By Frank C. Perkins

Precious Metals Recovered by Cyanide Processes

By Charles E. Munroe

English Motor Omnibuses for City and Country Use

By our English Correspondent

Improving Gas Engine Efficiency

Test of a Steam Turbine after Two Years Service

Consumption of Horseflesh in Germany

Ether Drift

Curious Habits of Wasps

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

Electrical Notes

Trade Notes and Recipes


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    August 05, 1905

    20% Sitewide for President's Day