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Approximate Economy of Gas and Electric Lighting

The Proposed New Patent Law

Artificial Diamonds

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

The Certification of Timepieces

A New Meteorite

The Inspection of Small Steamers

Hydraulic Riveting--Tweddell System

New Fluid Propeller or Motor

New Lawn Edge Mower

Improved Carpenter's Gauge

American Industries, No. 33

Manufacture of Rolled Iron

Improved Steam Packing

Proa Ladronia

Scientific Toys

Improved Shovel Plow Point

The Phylloxera in California

THE Hairy Crab.(Promia Vulgaris.)

Engineering Inventions - March 6, 1880

Artesian Wells For Colorado

Communications Received


  • Letters

    Correspondence - March 6, 1880

  • Departments

    Recent Inventions - March 6, 1880

  • Index of Inventions - March 6, 1880

  • Business and Personal - March 6, 1880

  • Notes and Queries - March 6, 1880

  • Patents - March 6, 1880

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