Volume 11, Issue 19
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Features
An English Lard Factory
The Explosion at Erith
Polytechnic Association of the American Institute
Farmers' Club
Galvanizing Iron-a Prize to the Inventor
Explosions--Our Cities in Danger
Definitions of Gears
Birds in Central Park
Fruitless Invention
Revolving Turrets or Broadside Ships?
The Market for the Month
The Great Mechanical Problems of the Day
Man Traps and Spring Guns
Trial of the 1,000-Pound Cannon
Recent American Patents
Patent Claims
Issued From the United States Patent-Office for the Week Ending October 25, 1864