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What Ought to be Known
Weekly Summary of Inventions
The Manufacture of Tin Plates
The Lightning Calculator
The Cattle Disease in Massachusetts
The Blandy Portable Steam Engine
Repairing Cracked Bells
Recent Extensions of Patents
Preventing Boiler Explosions
Polytechnic Association of the American Institute
Plastic Fillings for Teeth
Patent Extensions before Congress
Patent Claims - April 28, 1860
Issued from the United States Patent Office
Of Interest to None but Inventors
Interesting from Washington--Patent Law Discussion
Improved Ship's Stove
Foreign News and Markets - April 28, 1860
Discoveries and Inventions Abroad
Death of Hon Chas Stearns
Cotton Machinery Inventions
Chinese Green from Buckthorn
Byrn's Patent Corkscrew
Bristol's Anti-Friction Valve
American Telescopes--The Twist in the Grain of Trees
American Naval Architecture
A Woman Pleads for New Inventions
A Profitable Way of Burning Sawdust
A Cheap Fishing-Net Machine Wanted
Notes and Queries - April 28, 1860
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