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Features

Collapse of the South Fork Dam and Destruction of Johnstown

American and Italian War Ships

The New Mausoleum

Time Signals by the Magnesium Light

An Improved Bolting Chest

An Improved End Gate for Vehicles

Electric Lamp Hanger

An Improved Lock

A Boot or Shoe Sole Protector

A Fault in an Ocean Cable

Aspirators for Laboratory Use

By Geo. M. Hopkins

Photographic Notes- June 22, 1889

Universal Hand Lathe

New Micro-Surface Gauge

Departments

  • Letters

    Correspondence- June 22, 1889

  • Departments

    Business and Personal- June 22, 1889

  • Notes and Queries- June 22, 1889

  • Recently Patented Inventions- June 22, 1889

  • Index of Inventions- June 22, 1889

  • To Inventors- June 22, 1889

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