Chronic inflammation of the 'peritoneal membrane' is a frequent disease among dogs. The animal loses his appetite and spirits; he sometimes eats a little and sometimes not; he becomes thin, his belly is tucked up, and when we closely examine him we find it contracted and hard, and those longitudinal columns of which I have already spoken are peculiarly dense and almost unyielding. He now and then utters a half-suppressed whine, and he occasionally seeks to hide himself. In the greater number of cases he after a while recovers; but he too often pines away and dies. On examination after death the case is plain enough. There is inflammation of the peritoneal membrane, more indicated by undue congestion of the bowels than by the general blush of the membrane. The inflammation has now spread to the muscular coat, and the whole of the intestine is corrugated and thickened. There is another peritoneal affection, aggravated by combination with a rheumatic tendency, to which the dog is more disposed than any other domesticated animal. It has its most frequent origin in cold, or being too much fed on stimulating and acrid food, and probably from other causes which have not yet been sufficiently developed. Here also no drastic purgative is to be admitted; it would be adding fuel to fire: not a grain of calomel should be used, if the life of the animal is valued. The castor oil mixture will afford the most certain relief, a drop or two of the oil of peppermint being added to it. COLIC. The dog is also subject to fits of 'colic', principally to be traced to improper food, or a sudden change of food, or exposure to cold. This is particularly the case with puppies. There is no redness of the eye, no heat of the mouth, no quickened respiration; but the animal labours under fits of pain. He is not quiet for a minute. He gets into one corner and another, curling himself closely up, but he does not lie there more than a minute or two; another fit of pain comes on; he utters his peculiar yelp, and seeks some new place in which he may possibly find rest. It is with considerable diffidence that I offer an opinion on this subject contrary to that of Mr. Blaine. He states that the treatment of this species of colic is seldom successful, and that which has seemed the most efficacious has been mercurial purgatives; namely, calomel one grain, aloes a scruple, and opium a quarter of a grain, until the bowels are opened. I have seldom found much difficulty in relieving the patient suffering under this affection; and I gave no aloes nor calomel, but the oleaginous mixture to which I have so often referred. I should not so much object to the aloes, for they constitute an excellent purgative for the dog; nor to a dog that I was preparing for work, or that was suffering from worms, should I object to two or three grains of calomel intimately mixed with the aloes: from the combined effect of the two, some good might be obtained. CALCULUS IN THE INTESTINES