An Entertainment for Angels - download pdf or read online

By Patricia Fara

ISBN-10: 1840464593

ISBN-13: 9781840464597

ISBN-10: 1840465549

ISBN-13: 9781840465549

An leisure for Angels, instead of for males, one observer referred to as electrical energy, and it proved to be the main major clinical discovery of the Enlightenment. academics attracted large audiences who marveled at glowing fountains, flaming beverages, pirouetting dancers, and electrified boys. Flamboyant experimenters made chains of infantrymen jump into the air, whereas prosperous girls titillated their admirers with a sensational electrical kiss. Optimists envisioned that this unusual strength of nature might healing health problems, enhance crop construction, even convey the useless again to existence. An leisure for Angels tells the tale of ways electrical energy charged the eighteenth-century mind's eye. With modern illustrations and fascinating prose, Patricia Fara vividly portrays the struggles to appreciate the bizarre and fascinating results experiments have been generating. one of many heroes of the tale is Benjamin Franklin, popular on either side of the Atlantic as a professional on electrical energy, who brought lightning rods to guard tall constructions, pioneered strategies to regard paralyzed sufferers, and constructed probably the most profitable reasons of this mysterious phenomenon. Others comprise Luigi Galvani, whose electric examine on frogs and animals makes for grisly interpreting yet resulted in the invention of direct present electrical energy; and Alessandro Volta, who -- with Napoleon's enthusiastic help -- grew to become one in every of Europe's prime clinical practitioners and invented the world's first battery.

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Earlier natural philosophers had performed a few exploratory experiments, but they had discovered little that was not familiar to the Greeks. Partly because they were more interested in magnetism, their examinations were almost entirely limited to the attractive and repulsive properties of electrics, and they knew nothing of the flashes 27 of light and crackling sounds that so intrigued Enlightenment philosophers. So what sparked off this sudden interest in electricity (this pun may seem painfully weak, but it is typical of those that abound in eighteenth-century texts)?

In one spectacular performance, he found that he 38 could obtain mercurial phosphorescence without the barometer. Hauksbee produced ‘a Shower of Fire’ by passing a stream of air through a pool of mercury inside an air-pump’s globe. Repeating similar trials under different conditions enabled him simultaneously to satisfy the Fellows’ appetite for wonder, and to establish that a vacuum was not essential for the effect. Next he discovered that not even the mercury was necessary, since he could obtain a glow by rubbing together two objects inside the air-pump.

Another approach was to explore how effectively the shock from a Leyden jar could be transferred from one place to another. Nollet was the acknowledged expert at arranging spectacular demonstrations involving long chains of people holding hands. The first person in the line held a Leyden jar, and when the last one touched its prime conductor, they all jumped up into the air one after the other as the charge passed along them. At Versailles, Nollet entertained the king with 180 leaping soldiers; he achieved a similar feat with 200 Carthusian monks at their monastery, and later reached a record of over 600 people in his living chain.

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An Entertainment for Angels by Patricia Fara


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