With all our respect for the liberality of Mr. Seymour and the kind-heartedness of the vicar, we must, in justice to this respectable son of Apollo, express our disapprobation at so unprovoked a sarcasm. We acknowledge that Dr. Doseall, by the aid of low bows and high charges--of little ailments and large potions, had contrived to secure a very comfortable balance on the creditor side of his worldly ledger. We also admit, that after the example of other celebrated physicians, he had one sovereign remedy, which he administered in every disease. But what of that? he was often successful in his cures--that is to say, his patients sometimes recovered _after_ they had taken his physic; and is not that the test conventionally received in proof of the skill or ignorance of greater physicians than Dr. Doseall? Nor can we persuade ourselves into the belief, that a doctor who faithfully adheres to one single remedy, is less likely to be right than those restless spirits who are eternally coquetting with all the preparations of the Pharmacopœia without ever remaining steady to any one of them. It has been truly remarked, that the clock which stands still and points steadfastly in one direction, is certain of being right twice in the twenty-four hours, while others may keep going continually, and as continually going wrong. Being ourselves no doctors, we merely throw out this hint for the consideration of those who are learned in such matters: but we beg pardon of our readers for this digression. “Well,” said Mr. Seymour, “I am, at all events, rejoiced to see our Trojan in safety, after such perilous adventures; and I hope that he is now prepared to set sail again with us, on a new voyage of discovery. I have been engaged,” continued he, “in explaining still farther the nature of momentum, and I now propose to exhibit an experiment of a different kind, in order to illustrate the same subject. You, no doubt, remember,” continued Mr. Seymour, “that velocity makes up for weight: although, therefore, a fluid, as air, or water, may, in a state of quiescence, be unable to support a body, yet, by giving it a certain velocity, it may acquire a sustaining power. I have here several gilded pith-balls, through one of which I have run two pins, at right angles to each other: the naked points, you perceive, are defended with sealing-wax, to prevent any mischief that might arise from their accidentally coming into contact with your face. By means of this brass tube, (the stem of a tobacco-pipe will answer the same purpose,) I shall produce a current of air by my breath, and you will observe that the little ball will continue to dance, as if unsupported.”