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Learn more about Electricity in the online encyclopedia. (Site not responding. Last check: 2007-10-31) |
 | | Other European pioneers were Robert Boyle, who stated in 1675 that electric attraction and repulsion can act across a vacuum; Stephen Gray, who in 1729 classified materials as conductors and insulators; and C. Du Fay, who first identified the two types of electric charge that would later be called positive and negative. |
 | | The Leyden jar, a type of capacitor for storing electric charge in large quantities, was invented at Leyden University by Pieter van Musschenbroek in 1745. |
 | | William Watson, experimenting with the Leyden jar, discovered in 1747 that a discharge of static electricity was equivalent to an electric current. |
| www.onlineencyclopedia.org /e/el/electricity.html (1437 words) |