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Features

The Recent Meeting of the American Association for the Advancement of Science

Eikonogen-A New Universal Developer for Photographic Dry Plates and Bromide Paper

An Improved Fruit Picker

An Improved Valve Head for Blowing Engines

An Improved Lock Joint for Beams

A Combined Carpenters Rule, Calipers, Etc

An Improved Steam Boiler

An Improved Music Leaf Turner

An Improved Pen Holder

An Improved Artificial Leg

An Improved Blacking Box

An Improved Two-Wheeled Vehicle

The Brooklyn Navy Yard

Tangent Galvanometer

The Paris Exhibition

The First Gallery of the Eiffel Tower

Departments

  • Letters

    Correspondence- September 21, 1893

  • Departments

    Recently Patented Inventions- September 21, 1893

  • To Inventors- September 21, 1893

  • Business and Personal- September 21, 1893

  • Index of Inventions- September 21, 1893

  • Notes and Queries- September 21, 1893

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September 21, 1889