Changes

Another classical example of theory rejection is the rejection of phlogiston theoryin the eighteenth century. The theory was introduced by George Stahl (1660-1734) to account explain 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 theory was 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, and it had undergone several modifications to make was found that the metal calx weighed more than the existence of phlogiston plausiblemetal end product.[[CiteRef::Weisberg, Needham, and Hendry Antoine Lavoisier (20111743-1794)]] However, during posited instead that a substance he called `oxygen` was released from the Chemical Revolution, calx (which is now known as Antoine Lavoisier reviewed several experimental results that contradicted the existence metal`s oxide) during the formation of the metal. The phlogiston, he removed phlogiston from theory was rejected when the oxygen theory of combustion was accepted into the scientific mosaic at the time, in order to accommodate those experimental results.[[CiteRef::Weisberg, Needham, and Hendry (2011)]]