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Features

Improved Shingle and Heading Machinery

The Money Value of Education

Photo-Mechanical Printing

Improvements at the Mouth of the Mississippi

What is the Cause of Tides?

Motion on a Moving Body

A Curious Ocular Illusion

Smith's Improved Whiffletree Hook

Stockley's Improved Anti-Primer

Whipple's Improved Clothes Dryer

A New Locking Bolt

Improved Electric Lamp Lighter

Practical Mechanism

By Joshua Rose

Movable Fronts for Buildings

Improved Rotary Pump

The Solanum Crinitum

Growing Orchids

Car and Carriage Springs

Recent American and Foreign Patents - May 1, 1875

Communications Received - May 1, 1875

Departments

  • Letters

    Correspondence - May 1, 1875

  • Recommended

    New Books and Publications - May 1, 1875

  • Departments

    Notes and Queries - May 1, 1875

  • Business and Personal - May 1, 1875

  • Index of Inventions - May 1, 1875

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