Joseph Henry (1797-1878), American physical ?
Joseph Henry (1797-1878), American physical scientist whose work on the electromagnetic relay was the basis of the electrical telegraph, invented separately in the 1830's by American, Samuel Morse, and British, Charles Wheatstone. 1860s portrait
Picture No
10668214
Media ID
45233928
Size
2401px x 3000px
(864KB)
Credit
Mary Evans / Everett Collection
Usage Restrictions
Strictly editorial use only. Please contact Mary Evans if any other use required
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Basis Electromagnetic Electromagnetism Invented Inventors Morse Relay Separately Telegraphy Wheatstone
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