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Another typical classical example of theory rejection is the rejection of phlogiston theory. The theory was introduced by George Stahl (1660-1734) to account the process of the calcination used to prepare metals from their ores. Flammable substances such as wood were said to be rich in phlogiston, which was released by combustion. Metals were thought to be compounds of the metal`s calx and phlogiston. They were prepared by transferring phlogiston from burning wood charcoal to the calx. The theorywas further developed by Henry Cavendish (1731-1810) and Joseph Priestley (1733-1804). The chemical revolution brought greater attention to precise measurement of chemical processes  After Georg Ernst Stahl introduced the theory, it had undergone several modifications to make the existence of phlogiston plausible.[[CiteRef::Weisberg, Needham, and Hendry (2011)]] However, during the Chemical Revolution, as Antoine Lavoisier reviewed several experimental results that contradicted the existence of phlogiston, he removed phlogiston from the scientific mosaic at the time, in order to accommodate those experimental results.[[CiteRef::Weisberg, Needham, and Hendry (2011)]]