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Device for Removing Seeds and Pits from Fruit, Telegraph Insulation, and more

Editorial Correspondence

A Flying Parachute

Patent Telescopic Speaking Trumpet

Martin's Patent Safety Swing

Another Optical Illusion

Locke's Self-Lighting Gas Burner

The Construction of Watches

By H. F. Piaget

Pictorial Printing

Manufacturing Mining, and Railroad Items

Recent American and Foreign Patents

New Publications

Extension Notices

Answers to Correspondents

Constructive Mechanics and Educational Means

Water Meters

To Inquiring Correspondents

The Wheel Question

The Polytechnic Club of the American Institute

Forging by Drops and by Hammering

Official Report of Patent and Claims

Issued by the United States Patent Office

Pending Applications for Reissues


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May 09, 1868