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Novel Torpedo Boat Designing and Maneuvering

Pennsylvania Board of Health Notes

A Mechanical Movement

Gerstle's Hinged Handle for Pans, Etc

Barton's Improved Fence

An Improved Washing Machine

An Improved Annealing Box

An Improved Magnetic Ore Separator

Eberhardt's Universal Automatic Gear Cutting Machine

An Improved Globe Holder

The New U. S. Cruiser Baltimore

By F. T. Drake

Maria Mitchell

A Nest-Building Frog

By Nicolas Pike

Improved Bar Channeling Stone Drill


  • Recommended

    New Books and Publications- July 20, 1889

  • Departments

    Recently Patented Inventions- July 20, 1889

  • Business and Personal- July 20, 1889

  • Index of Inventions- July 20, 1889

  • Notes and Queries- July 20, 1889

  • To Inventors- July 20, 1889

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July 20, 1889

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