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Features

Relation of External Agents in Plant Reproduction

Scenes in Matanzas

Earthworms

By M. C. Holmes

Automobiles in Paris

The Wehnelt Interrupter for Induction Coils

American Machines in England

Thirty-Three-Ton Block-Loading Titan Crane

German Imitations of American Machine Tools

Trade Suggestions from United States Consuls

Miscellaneous Notes

Selected Formulæ

Electrical Notes

“A Thousand Days in the Arctic.”

Practice in Storming Breastworks by German Engineer Corps

The Commercial Development of Germany

By C. Rozenraad

What a Weather Observer should Know

By N. R. Taylor

Store Window Washing

The Progress of Submarine Navigation

The Cosmoscope

On the Therapeutic uses of Sea Travel

Rapid Blueprinting Processes

By Albert E. Guy

The “House in the Woods” at the Hague

Enameling as an Industry

By Josef Vollkommer

Patents!

Departments

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    June 10, 1899

    Help Us Reforest the Mississippi River Valley