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Features

Improvement in Heavy Ordnance, Conducting Wires for Military Telegraphs

The Condensed Milk Manufacture

Dyers' Recipes- March 25, 1871

The Flight of Birds

By R. O. Davidson

Spring Steps for Stairways

Improvement in Envelopes

Archibald's Improved Spoked Wheel

Railway Transit for New York

Thallium, Its Properties and Uses

Rating of Boilers

The Human Mind and the Human Hand

On the Nature and Manufacture of Charcoal

Cost of Water in New York City

Wood Carpeting

The Use of the Microscope in the Study of Rocks

Recent Patent Decision- March 25, 1871

Queries- March 25, 1871

Answers to Correspondents- March 25, 1871

Recent American and Foreign Patents- March 25, 1871

Applications for Extension of Patents- March 25, 1871

Official List of Patents- March 25, 1871

Issued by the U. S. Patent Office

Departments

  • Letters

    Correspondence- March 25, 1871

  • Recommended

    New Books and Publications- March 25, 1871

  • Departments

    Business and Personal- March 25, 1871

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March 25, 1871

Think Outside the Gift Box