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Improved Governor

A New Comet

The Effective Power of Steam Engines

Progress of Underground Railways in London

Compartment Ships

A Tree that Keeps a Standing Army

Another New Motor

The Oremation Question

Improved Combination Scissors

Improved Portable Oiler

An Instantaneous Life Preserving Raft

Prevention in Place of Cure

James Bogardus

Scientific and Practical Information - May 2, 1874

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

By R. H. Thurston

Christie's Railroad Detachable Claw Bar

Safety Bell Signal for Railways

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


  • 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

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