, by being reflected on the Surface of the Earth , and so ascending therefrom, to drive down into their Places those Terrestrial Bodies they find above them: This is, as near as I can gather, the Scope of the 20, 21, 22, and 23 Sections of the last Book of his Principia Philosophiæ ; yet neither he, nor any of his Followers, can shew how a Body suspended in Libero Æthere , shall be carried downwards by a continual Impulse tending upwards, and acting upon all its Parts equally: And besides the Obscurity wherewith he expresses himself, particularly, Sect. 23. does sufficiently argue according to his own Rules, the confused Idea he had of the thing he wrote.
Others, and among them Dr. Vossius , assert the Cause of the Descent of heavy Bodies , to be the Diurnal Rotation of the Earth upon its Axis , without considering, that according to the Doctrine of Motion fortified with Demonstration, all Bodies moved in Circulo , would recede from