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Features

Root's Novel Reciprocating Steam Engine

The Invention of the Card-Making Machine, Miscellaneous Summary

To Machinists and Others

Recent Southern Intelligence

Farmers' Club

Polytechnic Association of the American Institute

Impregnable Armor

Crosby's Pocket Calendar

Trivial Things

Explosions of Steam Boilers

A Remonstrance Against the Extension of the Goodyear Patent

The Monitor Turrets

The New Call, and Breech-Loaders

Special Notices

The Centigrade Thermometer

Recent American Patents

Patent Claims

Patents Granted for Seventeen Years!

To Our Readers

Rates of Advertising

The Cheapest Mode of Introducing Inventions

A Valuable Work for Inventors Patentees and Manufacturers

Improved Lightning-Rod, Diseases of Over-Worked Men

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March 26, 1864

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