Richard Kirwan, LL.D, FRS, FRSE MRIA (1 August 1733 – 22 June 1812) was an Irish geologist and chemist of the United Kingdom of Great Britain and Ireland. He was one of the last supporters of the theory of phlogiston.
Kirwan was active in the fields of chemistry, meteorology, and geology. He was widely known in his day, corresponding and meeting with Lavoisier, Black, Priestley, and Cavendish.
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