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Collapse of the South Fork Dam and Destruction of Johnstown

American and Italian War Ships

The New Mausoleum

Time Signals by the Magnesium Light

A Boot or Shoe Sole Protector

Electric Lamp Hanger

An Improved Lock

An Improved End Gate for Vehicles

An Improved Bolting Chest

A Fault in an Ocean Cable

Aspirators for Laboratory Use

By Geo. M. Hopkins

Photographic Notes- June 22, 1889

New Micro-Surface Gauge

Universal Hand Lathe


  • Letters

    Correspondence- June 22, 1889

  • Departments

    Business and Personal- June 22, 1889

  • Recently Patented Inventions- June 22, 1889

  • Notes and Queries- June 22, 1889

  • Index of Inventions- June 22, 1889

  • To Inventors- June 22, 1889

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June 22, 1889

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