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Features

Eight Light Dynamo

By M. Hopkins

New, Process for the Protection of Iron

Daniel Davis

The Celestial World

The Conjunction of Saturn and Delta Geminorum

Sea Lions in Central Park

The Designs for U. S. War Vessels

Improved Pan Lifter

Decisions Relating to Patents - April 23, 1887

Combined Tablet, Paper Weight, and Blotter

Improved Wagon Rack

Improved Stove

Improved Pen Holder Tip

Double Air Chamber Furring Tile

Connection Hanger for Electrotyping Apparatus

Safety Set Screw for Collars and Pulleys

Lewis Tent Pole and Ventilator

Improved Cash Carrier

James Buchanan Eads

Improved Compound Steam Engine

Improved Iron Planer

Engineering Inventions - April 23, 1887

Agricultural Inventions - April 23, 1887

Miscellaneous Inventions - April 23, 1887

To Inventors - April 23, 1887

Departments

  • Letters

    Correspondence - April 23, 1887

  • Recommended

    New Books and Publications - April 23, 1887

  • Departments

    Business and Personal - April 23, 1887

  • Notes and Queries - April 23, 1887

  • Index of Inventions - April 23, 1887

  • Patents

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April 23, 1887

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