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Carpenters' Improved Bench Hook

Another Splendid Locomotive

Skill of Dentists

Sale of the Franklin Railroad

Improved Shooting Harpoon

The First Railroad in Wisconsin

Central Railroad

Baird's Spark Arrester


British Association for the Advancement of Science

American Association for the Advancement of Science

Washington Irving's British Copyright

The Voltaic Battery

Compressed Air Engine

Tea Cultivation

Philadelphia Art-Union Plate

New and Improved Kind of Soap

Invention for the Opening of Iron Shutters of Stores

Appropriation for Electro Magnetism

Interesting to Inventors

Ocean Steamers

Improvement in the Purifying of Gas

No. 1 Vol. 5, Sci. Am

Improvement in the Manufacture of Flour


Our Foreign Correspondence

Genius is Democratic

War about the Materials of the Washington Monument

Machine for the Artificial Production of Ice

The Sea Serpent

An Improved Water Wheel

To Our Contemporaries

Prizes by the American Institute

A Question for the Curious—Molten Metals

Steam between Philadelphia and Liverpool

The Sinking of Ice

List of Patent Claims

The Quickest Passage

Iron Direct from the Ore

How to Lengthen a Leg

Caving in of Mines

New Prospectus

To Mechanics, Inventors, and Manufactures

An Insect Scourge

Van Kuran's Patent Railroad Car Wheel

Scientific Memoranda

Trees of the South

Kanawha, Va., Salines



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  • To Correspondents

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September 28, 1850

Of Shamrocks and Science

Happy St. Patrick’s Day