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De Motu, Section Thirty-five

25 September, 2015 - 15:17

The imperfect understanding of this situation has caused some to make the mistake of rejecting the mathematical prin- ciples of physics on the ground that they do not assign the efficient causes of things. It is not, however, in fact the business of physics or mechanics to establish efficient causes, but only the rules of the impulsions or attractions and, in a word, the laws of motions, and from the established laws to assign the solution, not the efficient cause, of particular phenomena.