Emilio Segrè Visual Archives

More than 30,000 photos of scientists and their work

Henry Joseph F4

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Henry Joseph F4

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Image title: 
Joseph Henry Magnet
Credit line: 
Smithsonian Institution, courtesy AIP Emilio Segrè Visual Archives

The small magnet at right was made by Joseph Henry in 1831, and measures 3 x 3.5 x 0.5 inches. The large core is 18 x 11 x 2.75 inches deep and weighs approximately 60 pounds.

Original format: 
1 photographic print (black and white; 4 x 3.5 inches)
Henry, Joseph, 1797-1878