“The whole of nature may be supposed to consist of two essences or substances one of which may be termed spirit, and the other matter. The former of these possesses the power to commence or produce motion, and the latter to receive and communicate it. So that motion, considered as a cause, immediately precedes ever y effect and, considered as an effect, it immediately succeeds ever y cause. The Motions Of Matter may be divided into two kinds, primar y and secondar y. The secondar y motions are those, whic