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Agricultural Engineering

Improvement in Sulky Harrows, Lighting Mines with Gas

Double Ratchet Brace

Ancient and Modern Industries of the Chinese

Manufacture of Indian Ink

From the Mechanics' Magazine.

The Tanite Solid Emery Wheel

Improved Open Fire Grate

The Barracuda

By John Ramsay Gordon

The Egyptian Fellah

By I. Cantini

Improved Lever Escapement

Our Splendid Engraving

Ludlow's Sliding Stop Valves for Steam, Water, and Gas

The Scientific American in 1869

Tin--Where and How It Is Obtained

Is Water Necessary to Mitigate the Effects of Dry Air from Heating Furnaces?

A Peculiar Feature of Agricultural Invention

Wanted--Better Sidewalks

The Steam Engine Trials at the American Institute Exhibition

Ancient Modes of Extinguishing Fires

Slate Pencils

Recent American and Foreign Patents- January 29, 1870

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

United States Circuit Court--Southern District before Judge Blatchford

Answers to Correspondents- January 29, 1870

Applications for Extension of Patents- January 29, 1870

Official List of Patents- January 29, 1870

Issued by the United States Patent Office. For the week ending Jan. 18, 1870. Reported Officially for the Scientific American.


  • On Cotton Seed and Cotton Seed Oil

  • Letters

    Correspondence- January 29, 1870

  • Recommended

    New Books and Publications- January 29, 1870

  • Departments

    Business and Personal- January 29, 1870

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January 29, 1870

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