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Features

Sanded Cotton

Improved Atmospheric Hammer

White Lead in Philadelphia

Abortion in Cows From Ergot

Coal Oil--Secret Inventions

Improved Steam Riveting-Machine

Machines for Sweeping Streets

Notes on the Great St.Louis Fair

Notes on Foreign Inventions

“The Hammer.”--Gross Plagiarism

Extracting Silver From its Ores

Pennsylvania Rock Oil

Influence of Different Kinds of Manure on Herbage

A Column of Interesting Varieties

Maillefert's Aerostatic Tubular Diving-Bell

Travis' Steam Governor

Improved Cap and Lantern

Editorial Correspondence

Reform of the Patent Laws

A Beetle in a Traveler's Ear

Patent Cases

Mare's Nests in Porkopolis

Foreign Summary--News and Markets

Weekly Summary of Inventions

Patent Claims

Machine for Sawing Out Barrel Heads

Opening of the Cooper Institute

The Great Balloon

Departments

  • Departments

    Notes and Queries

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The Essential Guide to the Modern World

The Essential Guide to the Modern World