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The Proposed New Croton Lake Dam and the New Croton Lake

The Sailing of Two Polar Expeditions

An Improved Feed Rack, Barn, Etc.

A Lock with Key Held Pendent

An Extensible Barrel Truck

Improved Wimshurst Static Electrical Machine

An Improved Car Coupling

The Artesian Well at Springfield, South Dakota

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

Simple Apparatus for Gathering and Examining Microscopic Objects

By M. Hopkins

A Book Finisher's Lettering Machine

The Hitchcock Life Guard for Electric Cars

Edison's Kinetograph and Cosmical Telephone


  • Letters

    Correspondence- June 20, 1891

  • Departments

    Notes and Queries- June 20, 1891

  • Business and Personal- June 20, 1891

  • Recently Patented Inventions- June 20, 1891

  • Index of Inventions- June 20, 1891

  • To Inventors- June 20, 1891

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Dwindling Supply. Increasing Demand.

Dwindling Supply. Increasing Demand.

Solving the Water Crisis