HPS211H1 Lecture Notes - Stephen Hales, Chemical Revolution, Phlogiston Theory
5 Mar 2013
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We continue into 18th century, so most of the work is deeply influenced by newton, as his thought spread over the continent, especially his idea of mass. 4 lavoisier"s oxygen chemistry: science of substance. Chemistry used to be used in mix with alchemy. Aristotle used earth, water, air, fire (e. g . tree is a wood form of earth and water and air) Chemistry studies change in substance rather than motion >>physics. Alchemy was very secretive as it"s a highly valued commodity. Chemistry = science of combination (distinguished by boyle) Chemistry as taxonomy >> used for classification and distinguishing while physics only cared about the common motion. Boyle thought all matter was same on basic level(similar aristotle: pneumatic chemistry>> of air and gas. Took lots of time to understand that air is homogeneous and non reactive. Stephen hales was first to show that some reactions give off air. Was mainly concerned with how much air, rather than composition.
