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13Let us now consider the discoveries of Archytas the Tarentine, and Eratosthenes of Cyrene, who, by the aid of mathematics, invented many things useful to mankind; and though for other inventions they are remembered with respect, yet they are chiefly celebrated for their solution of the following problem. Each of these, by a different method, endeavoured to discover the way of satisfying the response of Apollo of Delos, which required an altar to be made similar to his, but to contain double the number of cube feet, on the accomplishment of which, the island was to be freed from the anger of the gods.
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