Scientific American Magazine

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 London Exhibition--Steel Manufacture

Iron-Clad Vessels Building at New York

The Way the Velocity of Cannon Balls is Measured

Trial of Steam Plows

Valuable Receipts

Recent American Inventions

Patent Claims

Patents for Seventeen Years

The Cheapest Mode of Introducing Inventions

To Our Readers

Rates of Advertising

Important to Inventors

Hodgson's Chimney Fastener and Holder

Prospectus of the Scientific American

Correspondence

Notes and Queries