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Joseph Henry

Albany, N.Y. 17.December.1797-Washington  13.May.1878 
Biographical notes
Conducts his studies in the Albany NY becomes teacher in the same academy of mathematics and natural philosophy from 1826 to 1832.  1830 Princeton University offers the chair of Natural Philosophy which is accepted by Henry. Invent the 1831 relay. 1832 discovers the auto induction. Since 1832 to 46 is a lecturer at Princeton College in New Jersey. 1840 becomes secretary of the foundation-Smithsonian Institution..

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