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commonly believed that the element was discovered independently by carl wilhelm scheele , in uppsala , in or earlier, and joseph priestley in wiltshire , in . priority is often given for priestley because his work was published first. priestley, however, called oxygen "dephlogisticated air", and did not
favored explanation of those processes. [ ] established in by the german alchemist j. j. becher , and modified by the chemist georg ernst stahl by , [ ] phlogiston theory stated that all combustible materials were made of two parts. one part, called phlogiston, was given off when the substance containing...
https://en.wikipedia.org/wiki/Oxygen