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Diamond Cutting--A New Industry in New York


Specific Heat

Crude Petroleum for Fuel and for Illuminating Gas

The Fair of the American Institute

Rescue of the Remaining Survivors of the Polaris

A Simple Tree Protector

The Planet Mars--Is it Inhabited?

Calfskin Tanning in Europe

Self-Tightening Drill Chuck

The Great Exposition--Letter from United States Commissioner Professor R. H. Thurston

Improved Plow Attachment

The Danbury Drill Chuck

Automatic Railroad Gate and Signal

Recent American and Foreign Patents - October 4, 1873

Answer to Correspondents - October 4, 1873

Communications Received - October 4, 1873


  • Letters

    Correspondence - October 4, 1873

  • Recommended

    New Books and Publications - October 4, 1873

  • Departments

    Notes and Queries - October 4, 1873

  • Business and Personal - October 4, 1873

  • Index of Inventions - October 4, 1873

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