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or the four humors,
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essentially on Aristotelian natural philosophy.
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Chemistry, however,
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undermined the humoral elements,
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the four elements,
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and began to replace them with a wholly different set,
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leading ultimately to the periodic table.
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So, the whole basis of the four elements comes to be undermined
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by the chemical revolution.
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Indeed, there is a development of
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what's called iatrochemistry,
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which is the view that