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Cochrane's Mariner's Sound Indicator, Purifying Gas and Soap Limes

Device for Closing Ruptures in Fire Hose

A Woman's View of the Patent Office

The Incrustation of Boilers

[Condensed from Engineering.]

The Land of Fire and Ice

Perpetual Motion- February 11, 1871

Pruning Shears

Improved Cistern Filter

A Romance of Science

Improved Coal Ash Sifter

Cod-Liver Oil

Excavation and Embankment Tables

"And There were Giants in Those Days"—The Largest Inventor Yet—A Most Remarkable Family of Gigantic Turks

The Adulteration of Petroleum

An Invention Wanted to Clean the Streets of Snow. Solution of the Problem to be Found in Steam

The Alloys of Copper

The Downfall of Paris

Boynton's Lightning Saw

The Present and the Past- February 11, 1871

Scientific Intelligence- February 11, 1871

Queries- February 11, 1871

Answers to Correspondents- February 11, 1871

Recent American and Foreign Patents- February 11, 1871

Under this heading we shall publish weekly notes of some Of the more prominent home and foreign patents.

Offical List of Patents- February 11, 18711

Issued by the U. S. Patent Office


  • Letters

    Correspondence - February 11, 1871

  • Recommended

    New Books and Publications- February 11, 1871

  • Departments

    Business and Personal- February 11, 1871

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