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14Archytas obtained a solution of the problem by the semicylinder, and Eratosthenes by means of a proportional instrument. The pleasures derivable from scientific investigations, and the delight which inventions afford when we consider their effects, are such that I cannot help admiring the works of Democritus, on the nature of things, and his commentary, entitled Χειροτόνητον, wherein he sealed with a ring, on red wax, the account of those experiments he had tried.
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