Professor Lobstein says, "So far from blood-letting being beneficial, it is productive of the most serious consequences--a cruel practice, and a scourge to humanity. How many thousands are sent by it to an untimely grave! Without blood there is no heat, no motion in the body." Dr. Reid says, "If the employment of the lancet was abolished altogether, it would perhaps save annually a greater number of lives than pestilence ever destroyed." The fact of blood-letting having been practised by horse and cattle doctors from time immemorial is certainly not a clear proof of its utility, nor is it a sufficient recommendation that it may be practised with safety. During my professional career, the preconceived theories have commanded a due share of consideration; and, when weighed in the scale of uninfluenced experience, they never failed of falling short. If we grant that any deviation from the healthy state denotes debility of one or more functions, then whatever has a tendency to debilitate further cannot restore the animal to health. The following case will serve to illustrate our position: "A horse was brought to be bled, merely because he had been accustomed to it at that season of the year. I did not examine him minutely; but as the groom stated there was nothing amiss with him, I directed a moderate quantity of blood to be drawn. About five pints were taken off; and while the operator was pinning up the wound, the horse fell. He appeared to suffer much pain, and had considerable difficulty of breathing. In this state he remained twelve hours, and then died. Judging from the appearances at the post mortem examination, it is probable that a loss of a moderate quantity of blood caused a fatal interruption of the functions of the heart." It is strange that such cases as these do not open men's eyes, and compel them to acknowledge that there is something wrong in the medical world. Such cases as these furnish us with unanswerable arguments against blood-letting; for as the blood, which is the natural stimulus of, and gives strength to, the organs, is withdrawn, its abstraction leaves all those organs less capable of self-defence. Horse and cattle doctors have recommended bleeding when animals have been fed too liberally, or if their systems abound in morbific matter. Now, the most sensible course would be, provided the animal had been overfed, to reduce the quantity of food, or, in other words, remove the cause. If the secretions are vitiated, or in a morbid state, then regulate them by the means laid down in this work. For we cannot purify a well of water by abstracting a few buckets; neither can we purify the whole mass of blood by taking away a few quarts; for that which is left will still be impure. If the different parts had between them partitions impervious to fluids, then there would be some sense in drawing out of the vessels over-filled; but unfortunately, if you draw from one, you draw from all the rest.