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Features

The Proposed New Croton Lake Dam and the New Croton Lake

The Sailing of Two Polar Expeditions

A Lock with Key Held Pendent

An Improved Feed Rack, Barn, Etc.

An Extensible Barrel Truck

Improved Wimshurst Static Electrical Machine

An Improved Car Coupling

The Artesian Well at Springfield, South Dakota

Simple Apparatus for Gathering and Examining Microscopic Objects

By M. Hopkins

The St. Clair Tunnel Locomotives--The Largest Locomotive in the World

A Book Finisher's Lettering Machine

The Hitchcock Life Guard for Electric Cars

Edison's Kinetograph and Cosmical Telephone

Departments

  • Letters

    Correspondence- June 20, 1891

  • Departments

    Business and Personal- June 20, 1891

  • Recently Patented Inventions- June 20, 1891

  • Notes and Queries- June 20, 1891

  • Index of Inventions- June 20, 1891

  • To Inventors- June 20, 1891

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June 20, 1891

See the World from a Different Perspective

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