_Treatment_: In cases of acute poisoning, if the patient does not vomit freely, an emetic should be given, as from five[1] to twenty grains of sulphate of zinc in water or some ipecacuanha wine; give starch and water, also white of egg, and water in large quantities, and allow milk _ad libitum_. If there is great prostration, inject ether or brandy under the skin. In cases of chronic or slow poisoning by iodide of potassium, the medicine must, of course, be instantly stopped; and diluted hydrochloric acid, from two[1] to six drops in a dessertspoonful[1] to two tablespoonfuls of water given three times a day. If this does not stop the sickness and great thirst, the subnitrate of bismuth may be tried, in doses from five[1] to twenty grains, shaken dry on the tongue, every three or four hours. The dog must not have any water to drink, as it only increases the sickness; but plenty of ice placed in a perforated dish to lick, also iced barley or rice water. As there is often great weakness in these cases, nourishing food of an easily digested nature is required—Brand’s beef essence, given in jelly form; milk peptonised, or thickened with Benger’s food. As the case improves, lean raw meat in small quantities may be allowed. _Tartar Emetic_: _Symptoms_: The proper dose varies from a quarter[1] of a grain to one and a half grains. The symptoms, the result of a large dose, are continued sickness, with violent retching, and often diarrhœa; great thirst; coldness of lips, ears, and limbs, with severe depression and weak pulse, difficult breathing, collapse, and death. Sometimes just before dying the patient may be much convulsed. In cases of poisoning by tartar emetic, there is generally an absence of blood in the vomited matter and bowel evacuations, which is not the case in poisoning by arsenic, as blood is passed freely both ways. _Treatment_: Give a copious draught of warm water, with the idea of washing the stomach out; this, of course, is almost immediately brought up. A few minutes afterwards give from five[1] to thirty grains of gallic acid in water, which repeat every time the dog is sick, and let the animal have barley water or white of egg beaten up in water to drink. If there is great collapse, inject brandy or ether, from fifteen[1] minims to one drachm, under the skin with a hypodermic syringe; keep the patient warm, and as quiet as possible. When large doses of tartar emetic have been given, there is very little hope of recovery. _Turpentine_ is rather a favourite antithelmintic, though it is not so much given for this purpose now as it used to be; but it is still a good deal used by some keepers, and when not carefully and sparingly administered often proves fatal, especially in young patients.