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HISTORY OF THE TOWN OF MEDFORD, Middlesex County, Massachusetts, FROM ITS FIRST SETTLEMENT, IN 1630, TO THE PRESENT TIME, 1855. (ed. Charles Brooks), chapter 18 (search)
Harper's Encyclopedia of United States History (ed. Benson Lossing), Electricity in the nineteenth century. (search)
Henry, Joseph 1797-
Physicist; born in Albany, N. Y., Dec. 17, 1797; was a watchmaker for some years.
In 1826 he was appointed Professor of Mathematics in the Albany Academy, and in 1827 he began a series of experiments in electricity.
He fully developed the power of electro-magnetism, and perfected the electro-magnetic tel xplained to Professor Wheatstone his method of ringing a church bell 100 miles away by an electro-magnet.
On the organization of the Smithsonian Institution
Joseph Henry. at Washington, in 1846, Professor Henry was appointed its secretary, which post he filled with great ability until his death, May 13, 1878.
He published manysor Wheatstone his method of ringing a church bell 100 miles away by an electro-magnet.
On the organization of the Smithsonian Institution
Joseph Henry. at Washington, in 1846, Professor Henry was appointed its secretary, which post he filled with great ability until his death, May 13, 1878.
He published many scientific papers.
Harper's Encyclopedia of United States History (ed. Benson Lossing), Smithson , James Lewis Macie -1835 (search)
Harper's Encyclopedia of United States History (ed. Benson Lossing), United States of America . (search)
Knight's Mechanical Encyclopedia (ed. Knight), B. (search)
Knight's Mechanical Encyclopedia (ed. Knight), E. (search)