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Bradwardine, Thomas
velocity is a self-contradiction, a vacuum is impossible. In De proportionibus , Bradwardine first laid out the theory of ratios familiar from the theory of musical ratios as found in Boethius . He used this understanding of operations on ratios to reinterpret Aristotle 's theory. Velocities vary, he said, as the ratio of force to resistance. When the ratio of force to resistance is ‘doubled' the velocity is doubled, when the ratio is ‘tripled' the velocity is tripled and so on, with the...