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Features

The Saxby and Farmer Safety Switches and Signals

Science in Common Schooling

Syrian Sponges

Inspection of Boilers

The Mission of the Fly

Michigan's Salt Interests

The Hudson River Tunnel at New York

Scientific and Practical Information - April 3, 1875

Improved Water Injectors

Red Deer

Recent American and Foreign Patents - April 3, 1875

Communications Received - April 3, 1875

Canadian Patents - April 3, 1875

Departments

  • Letters

    Correspondence - April 3, 1875

  • Departments

    Business and Personal - April 3, 1875

  • Notes and Queries - April 3, 1875

  • Index of Inventions - April 3, 1875

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April 03, 1875

See the World from a Different Perspective

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