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The Panama Canal--A New Project for Its Completion

How to Purify Drinking Water

By Peter T. Austen

A Ridge and Hip Covering for Roofs

An Improved Toy for Children

An Improved Tool and Handle

An Improved Sunshade Hat

An Improved Railroad Tie and Chair

An Improved Metallic Shingle

A New Aerial Apparatus

A Cheap Flash Lamp

Simple Calls for Telephone Lines

A New Method of Electrically Driving Tuning Forks


  • Letters

    Correspondence- February 22, 1890

  • Recommended

    New Books and Publications- February 22, 1890

  • Departments

    Recently Patented Inventions- February 22, 1890

  • Notes & Queries- February 22, 1890

  • Index of Inventions- February 22, 1890

  • To Inventors- February 22, 1890

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February 22, 1890

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