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Pneumatic Dispatch

The War

The Polytechnic Association of the American Institute

Danchell's Tests for Water

Gold Coming and Going

Trap Quarries—Street Pavements

Sir William Armstrong—Is a Patent a Monopoly?

Information as to the Patentable Novelty of Inventions

A New Mode of Locomotion

Our Workshops and the War

English Shipbuilders Still Following Stevens's Floating Battery

Philadelphia Manufactures

New York Markets

Patent Claims - October 5, 1861


  • New Method of Transmitting Simultaneously Two Dispatches on One Wire

  • Departments

    Notes and Queries - October 5, 1861

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October 05, 1861

See the World from a Different Perspective

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