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2We must recollect, that not only from these elements, are all things generated, but that they can neither be nourished, nor grow without their assistance. Thus bodies cannot live without abundance of air; that is, without its being furnished for inspiration and respiration in considerable quantity. So, also, if a body do not possess a due proportion of heat, it can neither be endued with animal spirits nor a strong constitution, nor will the hardness of its food be duly attenuated: and if the members of the body are not nourished by the fruits of the earth, they will waste, because deprived of the mixture of that element with them.
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