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The Whitworth Industrial Scholarships

Two Typical Experiments

Publishers' Card

The Patent Office Again

Mica Mines in North Carolina

Tyndall on Typhoid

How to Investigate Spiritualism

The Crystallization of Glass

New Cloth-Singeing Machine

Floating Fire Engines

The Normal College, New York City

Apid Estimation of Phosphoric Acid, Magnesia, and Lime

Pendulum Governors

The Ericsson Pneumatic Torpedo

Coppen's Improved Transplanter

Improved Spike Extractor

The Yuccas

The Hymenocalyx Undulata

The Constitution of the Sun

Number I

By C. A. Young

Electro-Deposition of Metals

By J. T. Sprague

Decisions of the Courts - December 19, 1874

Recent American and Foreign Patents - December 19, 1874

Answers to Correspondents - December 19, 1874

Communications Received - 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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