Volume 6, Issue 20
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Features
Water Gas for Lighting and Heating
Preparation of Ditto Practised by Water Gilders
Amalgam of Gold or Silver
Improved Cultivator
Hydrogen a Metal
Silvering Plates for the Daguerreotype
Silvering Clock Faces, Barometer Plates, &c
Taciturnity of Genius
Verdict of the Coroner's Jury about the Fallen Buildings
Publishers and Editors
California Agency
Reform of the Patent Laws—Washington Republic
The Human Ear
Patent Cases
The World's Fair
Look out for Impostors
Expose of Paine's Light
Can Flax be Employed as a Substitute for Cotton
The Age of Gold
New Wingless Bird
Our Navigation
Air Locomotives again
Basaltic Columns
French Statistics
Roads
A Remington Bridge Fallen
History and Description of the U.S. Patent Office Buildings
Shanghai and the Chinese
Belts and Pulleys
Fast Sailing Ships
List of Patent Claims
English Patents to Americans
Mechanical Principles—No. 5
Patent Claims
Mechanics
Inventors and Manufacturers