Pierre-Jean Fabre
Pierre-Jean Fabre (1588- 9 January 1658) was a French doctor and alchemist. Born in Castelnaudary, France in 1588, he studied medicine in Montpellier, France. He became a practitioner of the iatrochemical medicine of Paracelsus. Beginning in 1610 he practiced medicine in Castelnaudary. He became famous as a specialist in the plague which was particularly severe in central Europe during the Thirty Years' War. Fabre prescribed chemical medications for the treatment of the plague and was at one time the private physician of King Louis XIII of France. Fabre was a practising alchemist, and claimed to have succeeded in the alchemical transmutation of lead into silver on 22 July 1627. He was strongly attracted to mystical aspects of chemistry, drawing parallels between the chemical operations of alchemy and the sacraments of the Christian church, particularly in his ''Alchymista Christianus'' (1632). Fabre died in Castelnaudary on 9 January 1658. Alchymista Christianus "He saw vali ...
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Palladium Spagyricum RGNb10332947
Palladium is a chemical element with the symbol Pd and atomic number 46. It is a rare and lustrous silvery-white metal discovered in 1803 by the English chemist William Hyde Wollaston. He named it after the asteroid Pallas, which was itself named after the epithet of the Greek goddess Athena, acquired by her when she slew Pallas. Palladium, platinum, rhodium, ruthenium, iridium and osmium form a group of elements referred to as the platinum group metals (PGMs). They have similar chemical properties, but palladium has the lowest melting point and is the least dense of them. More than half the supply of palladium and its congener platinum is used in catalytic converters, which convert as much as 90% of the harmful gases in automobile exhaust (hydrocarbons, carbon monoxide, and nitrogen dioxide) into nontoxic substances (nitrogen, carbon dioxide and water vapor). Palladium is also used in electronics, dentistry, medicine, hydrogen purification, chemical applications, groundwater ...
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