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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

Recent American and Foreign Patents

Manufacturing, Mining, and Railroad Items

Editorial Summary

Answers to Correspondence

Extension Notices

Plaster Molds for the Casting of Low Fusible Metals

Is the Career of Cholera Ended

Relief to Manufacturers

The Detroit Dilemma

Double-Wall Ice Pitchers

Patents and Claims

Issued by the United States Patent Office

Pending Applications for Reissues

New Publications

1868 Scientific American the Best Paper in the World

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