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New York Markets
Progress of Photography
Polytechnic Association of the American Institute
The Drill and its Office
Casting of a Great Gun--Official Report
Farmers' Club
What is Meant by the Conservation of Force
India-Rubber Once More
The Metropolitan Fair
Breech-Loading Small-Arms
The Way Inventors, Manufacturers and Consumers are Mutually Benefited
Lubricating the Steam-Engine
Recent American Patents
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Patents Granted for Seventeen Years!
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