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Method of Regulating the Speed of Wind Wheels, Mystery of the Great Pyramids, and more

The Geysers of California

Asphalt Pavement in Paris

Editorial Summary

Vogelmann's Combined Step and Extension Ladder

The Expense of a Hero

Science Familiarly Illustrated

Recent American and Foreign Patents

Answers to Correspondents

New Publications

Extension Notices

Jarecki's Lubricating Cup

Stierle's Improved Globe Valve

Robinson's Corn Husking Shield

Producing a Vacuum in Guns Before Firing

Engines and Boilers--Hydrogen in Boilers, Burning Boilers, Setting Boilers

The East River Bridge

The Coal Production of England

Fair of the American Institute

Editorial Correspondence

Patent and Claims

Pending Applications for Reissues


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September 28, 1867

20% Sitewide for President's Day