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Features

Improved Governor

Compartment Ships

A New Comet

A Tree that Keeps a Standing Army

The Effective Power of Steam Engines

Progress of Underground Railways in London

The Oremation Question

Another New Motor

Improved Portable Oiler

Improved Combination Scissors

An Instantaneous Life Preserving Raft

James Bogardus

Prevention in Place of Cure

Scientific and Practical Information - May 2, 1874

Strain Diagrams--What They Are and What They Tell Us

By R. H. Thurston

Safety Bell Signal for Railways

Christie's Railroad Detachable Claw Bar

Improved Mitering Machine - May 2, 1874

The Pyrophone

The Steam Siren or Fog Horn

Recent American and Foreign Patents - May 2, 1874

The English Telegraphs

By B. Prescott

Answers to Correspondents - May 2, 1874

Communications Received - May 2, 1874

Canadian Patents - May 2, 1874

Departments

  • Letters

    Correspondence - May 2, 1874

  • Departments

    Business and Personal - May 2, 1874

  • Index of Inventions - May 2, 1874

  • Patents - May 2, 1874

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May 02, 1874

Beyond XX and XY

Biology. Identity. Equality.