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| | Biographies, The Scientists: A List. |
 | | During the early part of the 19th century, Davy was conducting experiments which led to his conclusions that many common substances were formed by the combination of oxygen and metals. |
 | | This discovery further led Davy to decompose certain substances, and, in the process was to discover metals not commonly found in their pure state, such metals as: potassium, sodium, barium, strontium, etc. In 1812, Davy was knighted. |
 | | "He experimented in fluid lenses, and made great improvements in casting specula for the reflecting telescope." Rosse was to pay a £30,000, a huge sum for the day, to build a 58 foot long reflecting telescope in the park of his home in Ireland, Birr castle. |
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