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The Keokuk (Iowa) Bridge

The Illumination of Art Galleries

American Oyster Culture

The Patent Office

Solvents for Rubber

Polychrome Printing

Scientific and Practical Information - December 12, 1874

To our Present and Future Subscribers

The Coal and Iron Products of the World

A Device for Preventing Priming

Wire Tramways

The Underground Railway, New York City

Practical Mechanism - December 12, 1874

By Joshua Rose

New Railway Tunnel under the Hudson River, between New York and Jersey City

The City of Pittsburgh and its Industries

A New Hot Air Balloon

Safety Catch for Cranes

Recent American and Foreign Patents - December 12, 1874

Answers to Correspondents

Communications Received - December 12, 1874

Canadian Patents - December 12, 1874


  • Letters

    Correspondence - December 12, 1874

  • Departments

    Business and Personal - December 12, 1874

  • Index of Inventions - December 12, 1874

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