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| | Joseph John Thomson (Site not responding. Last check: 2007-10-20) |
 | | Sir Joseph John Thomson (18 December 1856 – 30 August 1940), often known as J. |
 | | Influenced by the work of James Clerk Maxwell, and the discovery of the X-ray, he deduced that cathode rays (see cathode ray tube) existed of negatively charged particles, which he called "corpuscles", and which are now known as electrons. |
 | | The electron had been posited earlier, by G. Johnstone Stoney, as a unit of charge in electrochemistry, but Thomson realised that it was also a subatomic particle, the first one to be discovered. |
| www.worldhistory.com /wiki/J/Joseph-John-Thomson.htm (375 words) |
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