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Progress of Zoology

American Pioneers in Deep Sea Exploration

By Alexander Agassiz

The Okapi and its Native Wilds

By Harry Johnston

Labor's Share

Three Times Capital's Reward in Productive Industry

Deep Wells that Feel the Sea

The Electrolytic Theory of the Corrosion of Iron.—II

The Real Cause of Iron Rust

By Allerton S. Cushman

Distant Operation by Hertzian Waves

Garet's Apparatus

A Novel System of Wireless Telephony

The Development of Armored War Vessels.—II

Armor Plating in the United States

By J. H. Morrison

The Rise of Man

A Study in Evolution

Tomatoes that Imitate Fruit

The Eccentricities of a Common Vegetable

By I. M. Angell

Photographic Plate Testing

Share which Manufactures Form of the Exports to the Various Sections of the World

Mosquito Extermination Work

An Account of Work in Massachusetts

By Henry Clay Weeks

The Karawanken Tunnel

The Construction of a Great Engineering Work

The Modern Locomotive

The Types which have been Evolved

By Paul T. Warner

Glacial Studies in the Sierra Nevada

Census of Metal-Working Machinery


The Periyar Irrigation Project

Electrical Notes

Engineering Notes

Trade Notes and Formulæ


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