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Cumberland Mountain Tunnel

Machine for Sticking Pins Into Paper

Railroad through the British Provinces of America

The Blue Ridge Tunnel

Foreign Correspondence

Liabilities of Railway Companies in England

New Process of Daguerreotyping

Soundings Obtained at Sea

Steamboats, Railroads and Telegraphs

Balloon Navigation

Improved Grain Drill

New Swingle-Tree for Carriages

New and Ingenious Tooth Puller


Restoration of Sight

To Clean Rusted Iron Work

Business in the Patent Office

Depilatory Powders

Steam versus Stame as a Propelling Power

Steamboat Boiler Bursting on the Western Waters

The Largest Edition Yet

Cast Iron Pavements

Back Numbers and Volumes

List of Patent Claims

Errata—Patent Claims

A Sofa Made Of Coal

The Spanish Fly and the Cockroach

New Jersey Zinc and Franklinite

New Discovery of Daguerreotype


Inventors and Manufacturers

Destruction of Ships by Spontaneous Combustion


  • From the Editor


  • Eratum

  • A Word to all—the Scientific American

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March 22, 1851

20% Sitewide for President's Day