_Treatment_: The vomiting at first should be encouraged by giving an emetic, as three[1] to ten drops of the one in fifty solution of apomorphia with a hypodermic syringe. If this is not at hand, give from the twelfth[1] to a quarter of a grain of the same medicine in a teaspoonful of water. Failing the apomorphia, give from five[1] to twenty grains of sulphate of zinc in a little warm water, or even salt and water. The vomiting may be kept up by getting the dog to drink warm water. Besides endeavouring to free the stomach of all the arsenic, an antidote is required to remedy the ill effect of the poison. For this there is nothing better than dialysed iron given in large doses, as from half[1] a teaspoonful to a tablespoonful every half hour until several doses have been given. This may be followed by a large dose of castor oil. About an hour afterwards some carbonate of bismuth should be given, shaken dry on the tongue, from ten[1] grains to a drachm, which may be repeated every hour or two. When there is great prostration, stimulants, as brandy, are required, and when the patient is unable to swallow or retain it in the stomach, from one[1] half to a drachm may be injected under the skin frequently. If the body is cold wrap the dog up in hot blankets, and place hot-water bottles around him. As improvement takes place, milk thickened with arrowroot, barley, or rice water may be given. If the dog appears in much pain after the acute stage has passed, small doses of laudanum may be given, and hot linseed poultices applied to the stomach. In chronic cases of poisoning by arsenic—a not uncommon occurrence, as this is a favourite remedy for skin diseases, and too much is often given, or the medicine is given too long—the dog loses appetite and condition, becomes very weak and emaciated, frequently vomiting a white, frothy mucus as well as food. There is often severe diarrhœa, and blood is passed with the motions. There are signs of tenderness on pressure over the region of the stomach, and excessive thirst. The membrane (conjunctiva) lining internal surface of eyelids is red and congested. _Treatment_: Discontinue the use of the arsenic immediately, give tonics, as reduced iron, from one[1] to three grains made into a pill with an extract of gentian. If the sickness continues, give from three[1] to ten grains of carbonate of bismuth, shaken dry on the tongue, every three or four hours. For food, lean raw mutton, in small quantities, every three or four hours, and milk to drink. If the latter is not retained, try it peptonised with Fairchild’s powders, which can be obtained at most chemists. When the sickness is very severe, Brand’s beef essence is recommended, given in jelly form, in small quantities frequently. _Phosphorus_: