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Features

Filtration of Our Water Supply

The Metric System in Congress

Imports and Exports of the Countries of the World Compared

Report of the Chief of the Bureau of Ordnance

Boston and the "America" Cup

The Greatest Iron Ore Mine in the World

The Iron and Steel Institute at Paris

By the Paris Correspondent of the Scientific American

Animals that Bloom and Plants that Eat Meat

By Charles Minor Blackford

A New Ratchet-Wrench

Power Scrapers on the St. Lawrence Power Company's Canal

The Plecher Electro-Pneumatic Telephone

A Recharging Motor for Electric Vehicles

The Manufacture of Edison Phonograph Records

A Novel Wind or Water Motor

The Roze Dirigible Airship

Disappearing Demon

By W. E. Robinson

The Protected Cruisers of the "St. Louis" Class

Armored Burrowers

By Charles F. Holder

V. An Inexpensive Water Motor

By George M. Hopkins

To Inventors

Departments

  • Departments

    Business and Personal - December 22, 1900

  • Notes and Queries - December 22, 1900

  • Recently Patented Inventions - December 22, 1900

  • Index of Inventions - December 22, 1900

  • New Books, Etc. - December 22, 1900

  • Patents - December 22, 1900

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Know Before You Vote

Know Before You Vote