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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

Howe's Cave

By H. C. Hovey

Improvement in Machine Guns

Engineering Inventions - January 15, 1881

The Face in Health and Disease

The Chicago Police Alarm System

A Mysterious Explosion and its Causes

By Joshua Rose

Curious Time Measurers

Mechanical Inventions - January 15, 1881

Agricultural Inventions - January 15, 1881

Cellar for Manufacturing Ice

Miscellaneous Inventions - January 15, 1881

Human Footprints in Kentucky Sandstone

Departments

  • Departments

    Recent Inventions - January 15, 1881

  • Business and Personal - January 15, 1881

  • Index of Inventions - January 15, 1881

  • Notes and Queries - January 15, 1881

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January 15, 1881

See the World from a Different Perspective

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