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Features

Improved Post Driving Machine, American Ordnance, and more

Editorial Correspondence

Heat and Cold

By John Tyndall

Rohrer's Improved Gutter Bracket and Support

Turning a Movable Wheel Around a Fixed Wheel

Editorial Summary

Recent American and Foreign Patents

Manufacturing, Mining, and Railroad Items

Answers to Correspondence

Extension Notices

Is the Career of Cholera Ended

The Detroit Dilemma

Relief to Manufacturers

Plaster Molds for the Casting of Low Fusible Metals

Double-Wall Ice Pitchers

Patents and Claims

Issued by the United States Patent Office

New Publications

Pending Applications for Reissues

1868 Scientific American the Best Paper in the World

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March 28, 1868

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