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Notwithstanding the false idea which prompted the researches of the alchemists, many advances were made in descriptive chemistry, the metals and their salts receiving much Iatrochemistry. attention, and several of our important acids being discovered.

The profession was literally ravaged by theories, schools and systems—iatromechanics, iatrochemistry, humoralism, the animism of Stahl, the vitalistic doctrines of Van Helmont and his followers—and into this metaphysical confusion Morgagni came like an old Greek with his clear observation, sensible thinking and ripe scholarship.