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Features

Progress of the Brooklyn Bridge

On Aids to Hearing

Progress of the Brush System of Electric Lighting

Electro-Metallurgy

Professor Gamgee's Ice Machine

Harvest Figures

Improved Tongs

Steamboats for South American Rivers

Portable Fountain Water Closet

Improvement in Machine Guns

Howe's Cave

By H. C. Hovey

The Chicago Police Alarm System

Engineering Inventions - January 15, 1881

The Face in Health and Disease

A Mysterious Explosion and its Causes

By Joshua Rose

Curious Time Measurers

Mechanical Inventions - January 15, 1881

Agricultural Inventions - January 15, 1881

Miscellaneous Inventions - January 15, 1881

Cellar for Manufacturing Ice

Human Footprints in Kentucky Sandstone

Departments

  • Departments

    Recent Inventions - January 15, 1881

  • Index of Inventions - January 15, 1881

  • Business and Personal - January 15, 1881

  • Notes and Queries - January 15, 1881

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January 15, 1881

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