Professor Von Poddingcoft (or Puddinghead, as the name may be rendered into English) was long celebrated in the University of Leyden for profound gravity of deportment and a talent at going to sleep in the midst of examinations, to the infinite relief of his hopeful students, who thereby worked their way through college with great ease and little study. In the course of one of his lectures, the learned professor seizing a bucket of water swung it around his head at arm's length. The impulse with which he threw the vessel from him, being a centrifugal force, the retention of his arm operating as a centripetal power, and the bucket, which was a substitute for the earth, describing a circular orbit round about the globular head and ruby visage of Professor Von Poddingcoft, which formed no bad representation of the sun. All of these particulars were duly explained to the class of gaping students around him. He apprised them, moreover, that the same principle of gravitation which retained the water in the bucket restrains the ocean from flying from the earth in its rapid revolutions; and he farther informed them that should the motion of the earth be suddenly checked, it would incontinently fall into the sun, through the centripetal force of gravitation: a most ruinous event to this planet, and one which would also obscure, though it most probably would not extinguish, the solar luminary. An unlucky stripling, one of those vagrant geniuses who seem sent into the world merely to annoy worthy men of the puddinghead order, desirous of ascertaining the correctness of the experiment, suddenly arrested the arm of the professor just at the moment that the bucket was in its zenith, which immediately descended with astonishing precision upon the philosophic head of the instructor of youth. A hollow sound, and a red-hot hiss, attended the contact; but the theory was in the amplest manner illustrated, for the unfortunate bucket perished in the conflict; but the blazing countenance of Professor Von Poddingcoft emerged from amidst the waters, glowing fiercer than ever with unutterable indignation, whereby the students were marvelously edified, and departed considerably wiser than before.