Note 633 — Chapter XXV
Reading edition
Je pense que la vitesse n’est pas la cause de l’augmentation de la force, encore qu’elle l’accompagne toujours. Id. p. 356, See also vol. viii., p. 14. He was probably perplexed by the metaphysical notion of causation, which he knew not how to ascribe to mere velocity. The fact that increased velocity is a condition or antecedent of augmented force could not be doubted.