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Features

Steam Pumping Engines for India State Railways

Copyrights

The Scope of the Infinitesimal

The Evil of Trade Organizations

Driving Power of Leather Belts

The Wreck of the Atlantic

The Present Condition of Arctic Explorations

Swindling Operations

Resistance of Woods to Torsional Strain

Diamonds Applied to Dressing and Working Moldings in Stone

A Submarine Observatory and Photographic Gallery

Weather Threshold

Recording Barometer

Pipe Tongs

Manufacture of Combs

Improved Water Fire-Grate

The Government Submarine Works at Hell Gate

Lunatic Asylum, Windsor, England

Postage Stamp Affixer

The Tanite Company's Shaper and Sharpener

Sulky Plow

Decisions of the Courts

United States Circuit Court--District of New Jersey

Recent American and Foreign Patents

Patent Office Decisions

Answers to Correspondents

Best Mode of Introducing New Inventions

Communications Received

Departments

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    Correspondence

  • New Books and Publications

  • Notes and Queries

  • Business and Personal

  • Index of Inventions

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April 19, 1873

Think Outside the Gift Box