Volume 7, Issue 8
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Features
Prevention of Accidents on Railroads
City Railroad
Foreign Correspondence
The Patent Office in Danger—To American Inventors
Varieties in Science
Galvanizing Iron—Protecting Steel from Oxidation—Sorel's Patent
Great Improvement in the Construction of Chains
Iron Stone—Terra cotta
Pencil Case Improvement
Improvement in Cast-Iron Car Wheels
Improvement in Endless Chains for Horse-Powers
Improvement in the Coiling Roving Machine
Complimentary to the Scientific American
Telegraph Case
Electro-Magnetism as a Motive Power
Medical
Steam Governor Valves
Patent Case
The Great Exhibition of Industry
Great Patent Case—McCormick's Reaper
List of Patent Claims
Oil from Popies
A New Cotton Plant
American Clippers—Cotton Sails
On Sending Receipts
Postage on Books
An Important Paragraph
Back Numbers and Volumes
Improved Candles
Steven's Siding and Flooring Machine
To Mechanics, Inventors, and Manufactures
Seventh Volume of the Scientific American