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Features

Improved Lumber Edging Machine, Great Railway Bridge

The Most Important American Discoveries and Inventions

A Glance at the Metropolitan Sanitary Fair

Polytechnic Association of the American Institute

Bing's Brake Shoe

Special Notices

Patent Reflector Lantern

Air Surface Condensers

Interesting Facts Concerning the Good-Year Patent Case

Inspect Your Steam Boilers

Patent Claims

Recent American Patents

Patents Granted for Seventeen Years!

Rates of Advertising

The Cheapest Mode of Introducing Inventions

Valuable Work for Inventors Patentees and Manufacturers

Improved Plan For Constructing Ships

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April 23, 1864

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