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FORE:II.In respect to the difference between expanding and solid dies it consists mainly in the time required to run back, and the injury to dies which this operation occasions. Uniformity of [145] size is within certain limits insured by solid dies, but they are more liable to derangement and less easy to repair than expanding or independent dies.

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FORE:It has been doubted, we think with insufficient reason, that Lucretius was acquainted at first hand with Empedocles.204 But, by whatever channel it reached him, the enthusiasm of Empedocles and the Eleates lives in his verse no less truly than the inspiration of Aeolian music in the song of his younger contemporary, Catullus. The atomic theory, with its wonderful revelations of invisible activity and unbroken continuity underlying the abrupt revolutions of phenomenal existence, had been the direct product of those earliest struggles towards a deeper vision into the mysteries of cosmic life; and so Lucretius was enabled through his grasp of the theory itself to recover the very spirit and passion from which it sprang.205

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