And even though one grant some duration to whirlwinds, which is quite contrary to the fact, yet what is to be said of the comets that have continued in sight for six months? Then, as hinted above, there 2 must be two motions in the same spot--one that constant motion of the heaven, accomplishing its task without intermission, the other a strange new motion conveyed by the whirlwind. The one must inevitably obstruct the other. And yet that motion we see of the moon in her orbit, and of the other heavenly bodies that pass above the moon, is irrevocable. It nowhere falters or stops, nor does it convey to us the slightest suggestion of an obstacle being ever placed in its way. It is utterly beyond belief that a whirlwind, the most violent and 3 unruly species of storm, should reach the very centre of the ranks of the stars, and should find a sphere for its boisterous activity in that ordered peace of heaven. Supposing that the revolution of a whirlwind kindles fire, which is shot up to the heights, furnishing apparent ground for the belief that what we see is a trail of fire; yet surely the shape of the fire ought to be something like that which produces it. Now a whirlwind is round in appearance; it remains in the same 4 track, and revolves after the fashion of a rotating pillar. The fire, therefore, that is enclosed ought to resemble it in shape. But in reality it is a trail of scattered fire, and resembles anything rather than fire gathered into a ball. XI