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Improved Gang Plow, New Mineral, and More

Manufacture of Ultramarine

The Congressional Report on Isherwood's Machinery

Recent American Patents

Hitchcock's Roller Quartz Mill

Smith's Rivet

Cutter's Shuttle

Price's Pea Sheller

Great Improvements in Sugar Making

Changing Alcohol into Vinegar

Inexplicable Boiler Explosions

Power Required to Drive Machines

A Sensible Governor

The Naval Engine Contest

The Opening of the Fair

Patent Claims

Patent Agency Office

Markland's Coal Scuttle


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  • Patents

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