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Features

The Myers Rotary Engine

Hints to Inventors and Capitalists

Rapid Transit in the City of New York

Chloroform Dangers

The Development of Subterranean Heat

Masters and Men

Novelplan for Building Submarine Structures

Carrier Pigeons

The Underground Railway, New York City

Crucibles

Improved Surface Blow-Off

Improved Sash Boring and Grooving Machine

Barrow-in-Furness (England) and Its Founder

The Franklin Institute Exhibition

Recent American and Foreign Patents - November 14, 1874

Answers to Correspondents - November 14, 1874

Communications Received - November 14, 1874

Canadian Patents - November 14, 1874

Departments

  • Letters

    Correspondence - November 14, 1874

  • Departments

    Business and Personal - November 14, 1874

  • Index of Inventions - November 14, 1874

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