But if we now conceive, instead of a twentieth vortex, a small solid body without motion, or without a centrifugal force that might fall back on it, it will be forced up by the nineteen vortexes below it, which are in equilibrium with the nineteen adjacent vortexes; but it will not be repelled as much as the twentieth, since it does not have, like the twentieth, a centrifugal force capable of falling back on it and driving it from the center of the earth.