| http://www.w3.org/ns/prov#value | - Aristotle wrote the best books of his age on politics, morality, belles-lettres, and natural history; but if he lived in our day, not only would he have to renounce belles-lettres to study all there is to be learned of natural history, but, supposing that he wished to make himself a master of one single branch of natural history, such as botany or mineralogy, he would be obliged to limit himself t
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