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The Whitworth Industrial Scholarships

Publishers' Card

Two Typical Experiments

The Patent Office Again

Mica Mines in North Carolina

How to Investigate Spiritualism

Tyndall on Typhoid

New Cloth-Singeing Machine

Floating Fire Engines

The Crystallization of Glass

The Normal College, New York City

Apid Estimation of Phosphoric Acid, Magnesia, and Lime

Pendulum Governors

Improved Spike Extractor

Coppen's Improved Transplanter

The Ericsson Pneumatic Torpedo

The Hymenocalyx Undulata

The Yuccas

The Constitution of the Sun

Number I

By C. A. Young

Electro-Deposition of Metals

By J. T. Sprague

Recent American and Foreign Patents - December 19, 1874

Decisions of the Courts - December 19, 1874

Communications Received - December 19, 1874

Answers to Correspondents - December 19, 1874

Canadian Patents - December 19, 1874


  • Letters

    Correspondence - December 19, 1874

  • Departments

    Index of Inventions - December 19, 1874

  • Business and Personal - December 19, 1874

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December 19, 1874