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Improved Salt Block, Cast-Steel Bells

Notes on Naval and Military Affairs

Appleton's Cyclopedia of Drawing

The Color Products of Coal--Mauve and Magenta

The Michigan Salt Works

Extraordinary Penetration of Armor Plates

The Way the Velocity of Cannon Balls is Measured

The London Exhibition--Steel Manufacture

Iron-Clad Vessels Building at New York

Trial of Steam Plows

Valuable Receipts

Patent Claims

Recent American Inventions

Patents for Seventeen Years

Important to Inventors

To Our Readers

The Cheapest Mode of Introducing Inventions

Rates of Advertising

Hodgson's Chimney Fastener and Holder

Prospectus of the Scientific American


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September 27, 1862