000			04315nam a2200337 a 4500
999			_c1789 _d1789
001			3924618
003			OSt
005			20191028154042.0
008			921203s1993 nyua f b 001 0deng d
010			_a 92037690
020			_a0195064887 (acidfree paper)
040			_aDLC _cDLC _dDLC
082	0	0	_a538 _220 _bV.G.H.
100	1		_aVerschuur, Gerrit L., _d1937- _97280
245	1	0	_aHidden attraction : _bthe history and mystery of magnetism / _cGerrit L. Verschuur.
260			_aNew York : _bOxford University Press, _c1993.
300			_avii, 256 p. : _bill. ; _c25 cm.
336			_2rdacontent _atext
337			_2rdamedia _aunmediated
338			_2rdacarrier _avolume
504			_aIncludes bibliographical references and index.
505	0		_aOf mystery and magnets (p.3) -- Clearing the decks (p.19) -- On the magnetical philosophy (p.31) -- Let the experimentation begin (p.43) -- Oersted and Ampere : the birth of electromagnetism (p.55) -- Michael Faraday : the era of discovery personified (p.73) -- Fields and Faraday (p.93) -- Maxwell sees the light (p.107) -- Heinrich Hertz's grand adventure (p.125) -- Curiouser and curiouser (p.147) -- What if? (p.163) -- Magnetic fields in space (p.183) -- The spark that bridged the universe (p.199) -- The era of creativity (p.209) -- The wages of curiosity (p.223) -- Appendix : the pattern of progress (p.233) -- Index (p.251)
520			_aLong one of nature's most fascinating phenomena, magnetism was once the subject of many superstitions. Magnets were thought useful to thieves, effective as a love potion, or as a cure for gout or spasms. They could remove sorcery from women and put demons to flight and even reconcile married couples. It was said that a lodestone pickled in the salt of sucking fish had the power to attract gold. Today, these beliefs have been put aside, but magnetism is no less remarkable for our modern understanding of it. In Hidden Attraction, Gerrit L. Verschuur, a noted astronomer and National Book Award nominee for The Invisible Universe, traces the history of our fascination with magnetism, from the first discovery of magnets in Greece, to state-of-the-art theories that see magnetism as a basic force in the universe. The book begins with the early debunking of superstitions by Peter Peregrinus (Pierre de Maricourt), whom Roger Bacon hailed as one of the world's first experimental scientists (Peregrinus held that "experience rather than argument is the basis of certainty in science"). Verschuur discusses William Gilbert, who confronted the multitude of superstitions about lodestones in De Magnete, widely regarded as the first true work of modern science, in which Gilbert reported his greatest insight: that the earth itself was magnetic. We also meet Hans Christian Oersted, who demonstrated that an electric current could influence a magnet (Oersted did this for the first time during a public lecture) and Andre-Marie Ampere, who showed that a current actually produced magnetism. Verschuur also examines pioneering experiments and theoretical break-throughs of Faraday and Maxwell and Zeeman (who demonstrated the relationship between light and magnetism), and he includes many lively stories of discovery, such as the use of frogs by Galvani and Volta, and Hertz's accidental discovery of radio waves. Along the way, we learn many interesting scientific facts, perhaps the most remarkable of which is that lodestones are made by bacteria (a sediment organism known as GS-15 eats iron, converting ferric oxide to magnetite and, over billions of years, forming the magnetite layers in iron formations). Boasting many informative illustrations, this is an adventure of the mind, using the specific phenomenon of magnetism to show how we have moved from an era of superstitions to one in which the Theory of Everything looms on the horizon
650		0	_aMagnetism _xPopular works.
650		0	_aMagnetism _xHistory _xPopular works.
650		0	_aPhysicists _xPopular works.
856			_3Abstract _uhttp://repository.fue.edu.eg/xmlui/handle/123456789/2628
906			_a7 _bcbc _corignew _d1 _eocip _f19 _gy-gencatlg
942			_2ddc _cBK