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Features

The Hamilton Surface Planer

The Dayton Cam Pump

The Depression in the Iron Trade

The Sewing Machine Monopolists Again at Work

Glacial Remains in Central America

Scientific and Practical Information - May 16, 1874

Dead Subjects and a Live Discussion

Oleomargarin

Improved Lard and Butter Cutter

An Inexhaustible Inkstand

The Colorado Potato Bug

The Shadow Sail

Strain Diagrams and their Revelations

By R. H. Thurston

Proceedings of the National Academy of Science

The Niagara Direct and Double Acting Pump

Improved Automatic Packing and Weighing Machine

Modern Egyptian Gardens

The Bow and Stern Screw Propeller

Recent American and Foreign Patents - May 16, 1874

Answers to Correspondents - May 16, 1874

Communications Received - May 16, 1874

Canadian Patents - May 16, 1874

Departments

  • Letters

    Correspondence - May 16, 1874

  • Recommended

    New Books and Publications - May 16, 1874

  • Departments

    Business and Personal - May 16, 1874

  • Index of Inventions - May 16, 1874

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