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GENERAL IDEAS OF MOTION AS APPLIED TO GEOMETRY.

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“Let him demonstrate a proposition in Euclid, in his five last books, extract a square root, or study algebra ; than which, as Clavius holds, 'in all human disciplines nothing can be more excellent and pleasant, so abstruse and recondite, so bewitching, so miraculous, so ravishing, so easy withal and full of delight,' it seems to captivate beyond all human pleasure. By this means you may define ex ungue leonem, as the diverb is, by his thumb alone the bigness of Hercules, or the true dimensions of the great Colossus, Solomon's temple, and Domitian's amphitheatre, out of a little part."

Burton's Anatomy of Melancholy.

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