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Grindstones

Suspension Bridges of the World

Markets for the Month

New Publications

Lakin's Water-Wheel Regulator

Special Notices

Van Kanel's Cherry Stones

Improvements in Gold and Silver Amalgamating

By Thomas Betty

Boiler Explosions on Western Waters

The Proper Temperature for Churning Butter

Velocity of Mechanism

Solid Floating on Molten Iron

Patent Claims

Issued from the U. S. Patent Office

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April 07, 1866