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Features

Taylor's American Field Piece

The Sources of Our Modern Knowledge

The Broadway Underground Railway

The Fire on Board the Steamer Alaska

Estimating Power by Size and Speed of Belts

Zirconium

Patent Medicines

The Hydraulic Ram

A Novel Mode of Marine Propulsion

Novel Rat Trap

The Wonders of the Egg

The Configuration and Dimensions of Blast Furnaces

American Locomotives--The Baldwin Works

Cart Loader

Combination Padlock

Culinary Boiler

Central Park, New York City

Recent American and Foreign Patents

Answers to Correspondents

Best Mode of Introducing New Inventions

Communications Received

Departments

  • Departments

    Correspondence

  • New Books and Publications

  • Notes and Queries

  • Business and Personal

  • Index of Inventions

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