The phlogiston theory

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• Phlogiston theory — The alchemist and physician J. J. Becher proposed the phlogiston theory The phlogiston theory (from the Ancient Greek φλογιστόν phlogistón burning up , from φλόξ phlóx flame ), first stated in 1667 by Johann Joachim Becher, is an obsolete… …   Wikipedia

• phlogiston theory — noun : a theory in 18th century chemistry disproved by Lavoisier: every combustible substance is a compound of phlogiston and the phenomena of combustion are due to the liberation of phlogiston with the other constituent left as a residue the… …   Useful english dictionary

• phlogiston — /floh jis ton, teuhn/, n. a nonexistent chemical that, prior to the discovery of oxygen, was thought to be released during combustion. [1720 30; < NL: inflammability, n. use of Gk phlogistón, neut. of phlogistós inflammable, burnt up; see… …   Universalium

• Theory — The word theory has many distinct meanings in different fields of knowledge, depending on their methodologies and the context of discussion.In science a theory is a testable model of the manner of interaction of a set of natural phenomena,… …   Wikipedia

• Science in the Age of Enlightenment — The scientific history of the Age of Enlightenment traces developments in science and technology during the Age of Reason, when Enlightenment ideas and ideals were being disseminated across Europe and North America. Generally, the period spans… …   Wikipedia

• Caloric theory — The caloric theory is an obsolete scientific theory that heat consists of a fluid called caloric that flows from hotter to colder bodies. Caloric was also thought of as a weightless gas that could pass in and out of pores in solids and liquids.… …   Wikipedia

• Theory of heat — In the history of science, the theory of heat or mechanical theory of heat was a theory, introduced predominantly in 1824 by the French physicist Sadi Carnot, that heat and mechanical work are equivalent.[1] It is related to the mechanical… …   Wikipedia

• Phlogiston — Phlo*gis ton, n. [NL., fr. Gr. ? burnt, set on fire, fr. ? to set on fire, to burn, fr. ?, ?, a flame, blaze. See {Phlox}.] (Old Chem.) The hypothetical principle of fire, or inflammability, regarded by Stahl as a chemical element. [1913 Webster] …   The Collaborative International Dictionary of English

• Theories and sociology of the history of science — The sociology and philosophy of science, as well as the entire field of science studies, have in the 20th century been preoccupied with the question of large scale patterns and trends in the development of science, and asking questions about how… …   Wikipedia

• phlogiston — A hypothetical substance of negative mass that, according to the theory of G.E. Stahl, was given off by a substance when it underwent combustion, thus accounting for the decrease in mass of the ash over the original substance; abandoned after the …   Medical dictionary

• History of the Encyclopædia Britannica — The Encyclopædia Britannica has been published continuously since 1768, appearing in 15 official editions. Several editions have been amended with multi volume supplements (3rd–6th) or undergone drastic re organizations (15th). In recent years,… …   Wikipedia