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Improved Gap Lathe

A Bull on the Track

The Centennial Surplus

Dual Life

Alleged Magneto-Photography

Remarkable Results of Evaporation and Rainfall

Straightening Saws

Important Observations on the Rocky Mountain Locust, Or Grasshopper Pest of the West

By C. V. Riley

The British Ironclad Alexandra

A New Hydraulic Engine

Martin's Gas Regulator for Steam Boilers

Improved Yard Stick and Bias Measure

Professor Gray's Telephone

The Friction of Plain Slide Valves

The Cat Teaser

Recent American and Foreign Patents

New Miscellaneous Inventions

New Mechanical and Engineering Inventions

Communications Received


  • Departments

    New Books and Publications

  • Business and Personal

  • Notes and Queries

  • Index of Inventions

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April 28, 1877