54 A VIS INERTIAE

degree of celerity more, or with 2 C, whichis just as much as was impressed the firsttime, overcomes its natural resistance a se-cond time ; and this second impressed forceit also retains, because of it’s inactivity to de-stroy, or lay it down. And just so, it re-tains the third force impressed, equal to anyof the former, and necessary to overcome itsequal resistance to be moved with a third de-gree of velocity, or with three times C al-together. And so on. Therefore the wholeresistance now will be the three forces im-pressed, equal to the three different resistancesmade : so that, as was staid, the moment isequal to the primitive or first resistance mul-tiplied by the celerity, or to the force im-pressed to overcome that resistance (n). Nor

is

(n) Here it hath been suggested, " That what I" think so evident about the force of bodies is disputedt£ by s’Gravesande , Bernouilli , ,&c. who estimate it by" the square of the velocity, and not by the simple pro-. " portion of the velocity.” To this I answer, ThatMr. Leibnitz, and those who follow him in this parti-cular, do not deny matter to be a resisting substance,more than others ; and as long as this is allowed, themain conclusion stands, let that resistance be in whatproportion it will. It would be of no service to a scep-tical objector to allow the resistance of matter, andonly quarrel about the proportion it is made in. But

farther,