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More on phlogiston theory from Infoplease: phlogiston theory (flōjis'ton) [key], hypothesis regarding combustion. The theory, advanced by J. J. Becher late in the 17th cent.
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Stahl called this mysterious, unknown substance "phlogiston" (pronounced flow-JISS-tunn). During combustion, phlogiston is given off into the air: But, please suspend your righteous contempt for this phlogiston theory, and try to ignore your inside information,
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The phlogiston theory (from the Ancient Greek φλογιστόν phlŏgistón "burning up," from φλόξ phlóx "fire"), first stated in 1667 by Johann Joachim Becher,
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phlogiston n. A hypothetical substance formerly thought to be a volatile constituent of all combustible substances, released as flame in combustion Georg Stahl renamed this substance phlogiston. With the phlogiston theory these chemists could explain not only combustion but also the reverse of calcination, reduction.
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Paper given by Priestley giving a summary of reasons to doubt the new antiphlogistic theory and retain that of phlogiston. Original text in HTML format, includes a glossary of archaic chemical terms . CONSIDERATIONS ON THE DOCTRINE OF PHLOGISTON, AND THE DECOMPOSITION OF WATER...
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Encyclopedia: Phlogiston theory
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Georg Ernst Stahl (1660 to 1734) developed Becker's terra pinguis, terra mercurialis, and terra lapida. He renamed the inflammable terra pinguis, phlogiston. Like electricity, phlogiston cannot be isolated. However materials like charcoal, oils, and waxes are rich in phlogiston.
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The prevailing view of combustion was the Phlogiston Theory which involved a weightless or nearly weightless substance known as phlogiston. This reduction in weight was explained as a loss of phlogiston into the air. For the smelting of an ore, the process reversed.
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Demise of Phlogiston The first comprehensive chemistry theory surfaced in the latter half of the 17th century and lasted for about 100 years. Phlogiston Johann Becher (1625-1682) and Georg Stahl (1660-1734) had much in common: Both were German, physicians, university professors,
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Tiscali Quicklinks. Please visit our Accessibility Page for a list of the Access Keys you can use to find your way around the site, skip directly to the main navigation, to the page content, or to more links within reference. Blue recalls the clear sky, the Atlantic Ocean, water, and rain.
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