Volume 12, Issue 25
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Features
Petition for Extension of a Patent--Fire Proof Safes
Artificial Diamonds
Mechanism of the Horse's Foot
Erratum
Archimedes and the Lever
A Swift Ship
List of Patent Claims
Foreign Summary
The Use and Choosing of Spectacles
History of Air Chambers on Pumps
Fogs, Fogs
New Pomp Boring Machine
Improvement in Rudders of Vessels
Adjustable Drop-Motion for Steam Valves
Cultivated Mechanics
Magnetic Communication for Individual Purposes
Errors of the Press
Exhibition of the Metropolitan Mechanics Society, Washington, D. C.
New Commissioner of Patents
Competition for Russian Work
Rheumatism and Cider
Report of the Commissioner of Patents for 1856
To Render Textile Fabrics Water-Proof
Separating Burrs From Wool
Finishing Yarns
Pile Ointment
Mechanics
Inventors, and Manufacturers