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The Work on the Simplon Tunnel

American Air Brakes on Russian Railroads

Contemporary Electrical Science

Bicycle Differential Gears

The Economic Position of Japan

The use of Kites to Obtain Meteorological Observations

By A. Lawrence Rotch

Educational Science at the British Association

The Enameline Process—Etching on Zinc

By W. T. M. Davidson

The Javal Acetylene Gas Generator

The True Carthage

Batrachia and Reptilia

Rubber Culture in Venezuela

The use of Insects as Food

Trade Suggestions from United States Consuls

Trade Notes and Receipts

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    Scientific American Supplements Volume 52, Issue 1355supp

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