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Features

Gravity

To Find the Tonnage of Ships

Cheap Railway Fares in England

Sweet's Patent Excavating Scraper

New York and Erie Railroad

The Floods of 1850

Quadrature of the Circle

Rats for the Table

The Present Cotton Crop

History and Construction of the Thermometer

Magnetic Principles of the Solar System or Deductions from Experiments with the Solar Magnetic Engine and previously known Astronomical Truths

List of Patent Claims

Sticking, or Court Plaster

To Inventors and Patentees

Scientific and Mechanical Information

Improvements in Carding

The Electric Telegraph in Europe

Improvement on Steam Engines

Crank and Pully

The Bakatlas of South Africa

Improved Machinery for Grinding Spiral Knives

Variations of the Compass

Tapestry Velvet and Other Carpets

The Largest Grape-vine in The United States

India Rubber Flute

To Our Contemporaries

The Great State Fair

Engravings

London Industrial Exhibition

To Our Subscribers—The End of the Volume

Index

Scientific American for Binding

Patent Claims

Important Notice to us

Answers to Correspondents

Departments

  • From the Editor

    To Correspondents

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September 14, 1850

Confronting Common Wisdom