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The Halpin-Savage Torpedo

1,492 Feet for the Height of the American Tower

Meeting of the National Telephone Association

The International Congress of American States

An Attachment for Scissors

An Improved Blast Heater

An Improved Replacing Frog

An Improved Sketching Tripod, or Delineator

An Improved Swinging Window Sash

An "Otto" Gas Engine of One-Third Horse Power

Jacob's Ladder

Thomas Alva Edison

Arrangement of Battery Cells

To Inventors- October 12, 1889


  • Letters

    Correspondence- October 12, 1889

  • Recommended

    New Books and Publications- October 12, 1889

  • Departments

    Business and Personal- October 12, 1889

  • Notes and Queries- October 12, 1889

  • Recently Patented Inventions- October 12, 1889

  • Index of Inventions- October 12, 1889

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