Joseph Henry
See also: Henry
Joseph Henry (1797-1878), American physicist who discovered the self-induction and the principle of the electromagnetic induction of the induced currents. In 1832 returned to him the electric measuring unit of inductance which was named the Henry in his honor. Henry experienced and improved the electromagnet, invented in 1823 by English William Sturgeon. Since 1829, it had developed electromagnets of a great power of lifting. In 1831, it manufactured the first operational electromagnetic telegraph. Henry conceived and built also one of the first electrical motors… In 1847, whereas he was secretary of the Smithsonian Institute of the United States, he founds a system of meteorological observations. The telegraphic bulletins of all the observatories of the country are centralized with the institute, and analyzed information the every day. A large chart is established, and a bulletin is addressed to the Washington Evening Post .
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Author of many work on the electromagnetism.
- It discovered the Auto-induction and the Courant of rupture.
- It improved the electromagnet.
See too
Related articles
- Telegraph
- Winding
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