Some dogs vomit once or twice in the early period of the disease: when this happens, they never return to the natural food of the dog, but are eager for everything that is filthy and horrible. The natural appetite generally fails entirely, and to it succeeds a strangely depraved one. The dog usually occupies himself with gathering every little bit of thread, and it is curious to observe with what eagerness and method he sets to work, and how completely he effects his object. He then attacks every kind of dirt and filth, horse-dung, his own dung, and human excrement. Some breeds of spaniels are very filthy feeders without its being connected with disease, but the rabid dog eagerly selects the excrement of the horse, and his own. Some considerable care, however, must be exercised here. At the period of dentition, and likewise at the commencement of the sexual affection, the stomach of the dog, and particularly that of the bitch, sympathises with, or shares in, the irritability of the gums, and of the constitution generally, and there is a considerably perverted appetite. The dog also feels the same propensity that influences the child, that of taking hard substances into the mouth, and seemingly trying to masticate them. Their pressure on the gums facilitates the passage of the new teeth. A young dog will, therefore, be observed gathering up hard substances, and, if he should chance to die, a not inconsiderable collection of them is sometimes found in the stomach. They are, however, of a peculiar character; they consist of small pieces of bone, slick, and coal. The contents of the stomach of the rabid dog, are often, or generally, of a most filthy description. Some hair or straw is usually found, but the greater part is composed of horse-dung, or of his own dung, and it may be received as a certainly, that if he is found deliberately devouring it, he is rabid. Some very important conclusions may be drawn from the appearance and character of the urine. The dog, and at particular times when he is more than usually salacious, may, and does diligently search the urining places; he may even, at those periods, be seen to lick the spot which another has just wetted; but, if a peculiar eagerness accompanies this strange employment, if, in the parlour, which is rarely disgraced by this evacuation, every corner is perseveringly examined, and licked with unwearied and unceasing industry, that dog cannot be too carefully watched, there is great danger about him; he may, without any other symptom, be pronounced to be decidedly rabid. I never knew a single mistake about this.