These remarks are valuable, inasmuch as they go to prove the importance, in the treatment of disease, of a restoration of the lost function. Our system of applying friction, warmth, and moisture to the external surface, in all cases of internal disease, here finds, in the authors just quoted, able advocates. FOOTNOTE: [14] What a destructive system, then, must blood-letting be, which proposes to supply this deficiency in the empty vessels by opening a vein and suffering the contents of the overcharged vessels to fall to the ground! If the blood abstracted from the full veins could be returned into those "empty" ones, then there would be some sense in blood-letting. SPAYING COWS. The castration of cows has been practised for several years in different parts of the world, with such remarkable success, that no one will doubt there are advantages to be derived from it. For the benefit of those who may have doubts on this subject, we give the opinions of a committee appointed by the Rheims Academy to investigate the matter. "To the question put to the committee-- "1st. Is the spaying of cows a dangerous operation? "The answer is, This operation, in itself, involves no more danger than many others of as bold a character, (as puncture of the rumen,) which are performed without accident by men even strangers to the veterinary art. Two minutes suffice for the extraction of the ovaries; two minutes more for suturing the wound. "2dly. Will not the spaying of cows put an end to the production of the species? "Without doubt, this is an operation which must be kept within bounds. It is in the vicinity of large towns that most benefit will be derived from it, where milk is most generally sought after, and where pasturage is scanty, and consequently food for cows expensive. On this account it is not the practice to raise calves about the environs of Paris. Indeed, at Cormenteul, near Rheims, out of one hundred and forty-five cows kept, not more than from ten to fifteen calves are produced yearly. "3dly. Is spaying attended with amelioration of the quality of the meat? "That cows fatten well after being spayed is an incontestable fact, long known to agriculturists. "4thly. Does spaying prolong the period of lactation, and increase the quantity of milk? "The cow will be found to give as much milk after eighteen months as immediately after the operation; and there was found in quantity, in favor of the spayed cows, a great difference. "5thly. Is the quality of the milk ameliorated by spaying? "To resolve this question, we have thought proper to make an appeal to skilful chemists resident in the neighborhood; and they have determined that the milk abounds more by one third in cheese and butter than that of ordinary cows."