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The Nicaragua Canal

By Lewis M. Haupt

An English Review of the Spanish American War

The Production of Metallic Tubes by Extrusion

A New High Speed Locomotive

Trade Suggestions from United States Consuls

Electrical Notes

Selected Formulæ

Miscellaneous Notes

The New Kaiserjubiläums-Stadt Theater of Vienna

New Jersey Corporations

The Volcano of the Exposition of 1900

Patent Systems of the United States and Foreign Countries Compared

By W. Clyde Jones

Curious Customs of the Isawiyah

A Drawing Traced by Fire

The North American Porcupine

By G. Archie Stockwell

On the Boiling Point of Liquid Hydrogen under Reduced Pressure

By James Dewar

Wireless Telegraphy

By G. Marconi



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