Letter, 1848.
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Henry, Joseph, 1797-1878
http://n2t.net/ark:/99166/w6x16x2w (person)
Joseph Henry (1797-1878, APS 1835), a physicist, was the first secretary and director of the Smithsonian Institution, a post he retained for over three decades. Henry was a leading experimental scientist whose contributions include several discoveries in the field of electromagnetics. He has been credited with the invention of the electromagnet and the telegraph, among other things. Henry was born in 1797 in Albany, New York, the son of William Henry, a teamster, and his wife An...
