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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

Improvements in Casting Pulleys and Grooved Rolls

Infantile Power Washing Machine

On the Proper Resistance of Telegraphic Relays

Dyers' Recipes- March 4, 1871

Peanuts and Peanut Oil

By H. E. Colton

Improved Horse-Power Hayfork

A Government Bureau of Mines

Narrow Gage Railways

The Mechanical Equation

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

The American Eclipse Expedition

Alaska.--Climate and Products

Peat Fuel for Locomotives

The Lifting Cure

Statistics of Steam Boiler Explosions for the Year 1870

Answers to Correspondents- March 4, 1871

Queries- March 4, 1871

Recent American and Foreign Patents- 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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