Look up phlogiston in Wiktionary, the free dictionary. The phlogiston theory, a superseded scientific theory, postulated the existence of a fire-like element...

scientific theories are discarded in their entirety, such as the replacement of the phlogiston theory by energy and thermodynamics. Some theories known to...

Ernst Stahl by 1731, phlogiston theory stated that all combustible materials were made of two parts. One part, called phlogiston, was given off when the...

and also recognized hydrogen as an element (1783), opposing the phlogiston theory. Lavoisier helped construct the metric system, wrote the first extensive...

teenager, Scheele had learned the dominant theory of gases which in the 1770s was the phlogiston theory. Phlogiston, classified as "matter of fire", was supposed...

needed] According to the obsolete phlogiston theory, the calx was the true elemental substance that was left after phlogiston was driven out of it in the process...

"dephlogisticated air" (oxygen). Priestley's determination to defend phlogiston theory and to reject what would become the chemical revolution eventually...

law of cooling. The theory of phlogiston arose in the 17th century, late in the period of alchemy. Its replacement by caloric theory in the 18th century...

phlogiston theory of combustion in the 17th century, phlogiston was thought to be the substance of heat. There is one version of the caloric theory that...

According to the obsolete phlogiston theory, the 'calx' was the true elemental substance that was left after phlogiston was driven out of it in the...