Chapter 63

Now let us sing what makes the stars to move. In first place, if the mighty sphere of heaven Revolveth round, then needs we must aver That on the upper and the under pole Presses a certain air, and from without Confines them and encloseth at each end; And that, moreover, another air above Streams on athwart the top of the sphere and tends In same direction as are rolled along The glittering stars of the eternal world; Or that another still streams on below To w…