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Approximate Economy of Gas and Electric Lighting

The Proposed New Patent Law

Important Decision by the U. S. Circuit Court --The Page Electrical Patent Sustained

Artificial Diamonds

A New Meteorite

The Inspection of Small Steamers

The Certification of Timepieces

Hydraulic Riveting--Tweddell System

New Fluid Propeller or Motor

Improved Carpenter's Gauge

New Lawn Edge Mower

American Industries, No. 33

Manufacture of Rolled Iron

Improved Steam Packing

Proa Ladronia

Scientific Toys

Improved Shovel Plow Point

THE Hairy Crab.(Promia Vulgaris.)

The Phylloxera in California

Artesian Wells For Colorado

Engineering Inventions - March 6, 1880

Communications Received


  • Letters

    Correspondence - March 6, 1880

  • Departments

    Recent Inventions - March 6, 1880

  • Business and Personal - March 6, 1880

  • Notes and Queries - March 6, 1880

  • Index of Inventions - March 6, 1880

  • Patents - March 6, 1880

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March 06, 1880

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