Книга: Dickerson E N «Joseph Henry and the magnetic telegraph»

См. также в других словарях:

• telegraph — telegrapher /teuh leg reuh feuhr/; esp. Brit., telegraphist, n. /tel i graf , grahf /, n. 1. an apparatus, system, or process for transmitting messages or signals to a distant place, esp. by means of an electric device consisting essentially of a …   Universalium

• henry — The unit of electrical inductance, when 1 V is induced by a change in current of 1 A/sec. [Joseph H.] * * * hen·ry hen rē n, pl henrys or henries the practical mks unit of inductance equal to the self inductance of a circuit or the mutual… …   Medical dictionary

• Henry — James Paget, U. S. physiologist, *1914. See H. Gauer response. Joseph, U.S. physicist, 1797–1878. See Dalton H. law. William, British chemist, 1774–1836. See H. law. * * * hen·ry hen rē n, pl henrys or …   Medical dictionary

• Henry , Joseph — (1797–1878) American physicist One of the first great American scientists, Henry came from a poor background in Albany, New York, and had to work his way through college. He was educated at the Albany Academy, New York, where he first studied… …   Scientists

• Electrical telegraph — A printing electrical telegraph receiver, and a transmitter key at bottom right An electrical telegraph is a telegraph that uses electrical signals, usually conveyed via telecommunication lines or radio. The electromagnetic telegraph is a device… …   Wikipedia

• electrical and electronics engineering — Introduction       the branch of engineering concerned with the practical applications of electricity in all its forms, including those of the field of electronics. Electronics engineering is that branch of electrical engineering concerned with… …   Universalium