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[TO-MORROW, IN A COFFIN IS CONFINED.] 735. Castor Oil Castor Oil is a most valuable medicine, as it generally operates quickly and mildly. It is used externally, combined with citron ointment, as a topical application in common leprosy. It is used internally as an ordinary purgative for infants, as a laxative for adults, and in diarrhoea and dysentery. In colic it is very useful and safe; and also after delivery. Dose for infants, from forty drops to two drachms; for adults, from half an ounce to one and a half ounces. 736. Sulphur. Sublimed sulphur is laxative and diaphoretic. It is used externally in skin diseases, especially itch, both in the form of ointment and as a vapour bath. It is used internally in hemorrhoids, combined with magnesia, as a laxative for children, and as a diaphoretic in rheumatism. Dose, from one scruple to two drachms, mixed in milk or with treacle. When combined with an equal proportion of cream of tartar, it acts as a purgative. 737. Magnesia. Calcined magnesia possesses the same properties as the carbonate. Dose, from ten to thirty grains, in milk or water. Carbonate of magnesia is an antacid and laxative, and is very useful for children when teething, and for heartburn in adults. Dose, from a half to two drachms, in water or milk. Fluid Magnesia is a useful preparation by whose use is avoided the grittiness that is inseparable from magnesia when taken in the form of powder. 738. Senna Senna is a purgative, but is apt to gripe when given alone; therefore it is combined with some aromatic, such as cloves or ginger, and the infusion should be made with cold instead of hot water. It usually acts in about four hours, but its action should be assisted by drinking warm fluids.