Scientific American Magazine Vol 9 Issue 15

Scientific American Magazine

Volume 9, Issue 15

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Features

Inventors Protective National Union

Prizes—The Last Call

Strait's Saw Doctor

Collins' Patent Duplex Valve Motion

Misrepresentation about Foreign Inventions

Carburetted Hydrogen

Imponderable Agents.—No. 2

Beware of Putting Patent on an Unpatented Article

Large Ships—Ancient and Modern

Treatment of Trees in Cold Weather

New India Rubber Case

Trial about Selling a Patent

The Illustrated Weekly Record of the New York Exhibition of the Industry of all Nations

List of Patent Claims

Measuring the Area of a Cirle

Improved Car Seat

Machine for Tenoning Blind Slats

Taggart's Improvement in Flour Machinery

Hen's Nest

Former for Boot Leather

Elastic Oil Chamber

India Rubber Beneath Rails

Patent Office—Report of the Secretary of the Interior

Recording of Assignments-Property of Patents

The New Rule of the Patent Office

Committees On Patents

Crystal Palace

Trial of Steam Engines in the Crystal Palace

The Scientific Dog

Cornish Valves

Collyer's Patent Quartz Crusher

Photography on Linen

Taggart's Improved T-Square

Mechanics

Departments

To Correspondents

A Chapter of Suggestions, &C