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Features

Adjustable Cane Mill, Reinforcing superanuated Cannon, and more

F. Crace Calvert on Preserving Meat

Polytechnic Association of the American Institute

New Rebel Torpedo

Age of the Human Race

The Tumble in Prices

Worcester's and Jones's Door Spring

Native Chicory

Ill-Regulated Machinery

Peculiarities of the Paddle-Wheel

Slovenly Workmanship

The Theory of Expansion

Recent American Patents

Patent Claims

Issued from the United States Patent-Office

Departments

  • Departments

    Correspondence

  • Notes and Queries

  • Patents

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