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Improved Balanced Slide Valve, Curious Case of Asymmetry

Measuring Faucet

Wood and Ivory Carving

By J. D. Crace

One Hundred Years Ago

Perpetual Motion

Infantile Power Washing Machine

Improvements in Casting Pulleys and Grooved Rolls

On the Proper Resistance of Telegraphic Relays

Dyers' Recipes- March 4, 1871

Peanuts and Peanut Oil

By H. E. Colton

Improved Horse-Power Hayfork

The Mechanical Equation

Narrow Gage Railways

Dangers of Petroleum Oils. Report of the Health Board of New Orleans. A Law Regulating the Sale of Such Oils Recommended

A Government Bureau of Mines

The American Eclipse Expedition

Peat Fuel for Locomotives

Alaska.--Climate and Products

The Lifting Cure

Statistics of Steam Boiler Explosions for the Year 1870

Queries- March 4, 1871

Recent American and Foreign Patents- March 4, 1871

Answers to Correspondents- March 4, 1871

Official List of Patents


  • Letters

    Correspondence- March 4, 1871

  • Recommended

    New Books and Publications- March 4, 1871

  • Departments

    Business and Personal- March 4, 1871

  • Patents- March 4, 1871

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March 04, 1871