If it be _actually_ necessary to give him opening medicine, one or two teaspoonfuls of syrup of senna, repeated if necessary, in four hours, will generally answer the purpose; or, for a change, one or two teaspoonfuls of castor oil may be substituted. Lenitive electuary (compound confection of senna) is another excellent aperient for the young, it being mild in its operation, and pleasant to take; a child fancying it is nothing more than jam, and which it much resembles both in appearance and in taste. The dose is half or one teaspoonful early in the morning occasionally. Senna is an admirable aperient for a child, and is a safe one, which is more than can be said of many others. It is worthy of note that “the taste of senna may be concealed by sweetening the infusion, adding milk, and drinking as ordinary tea, which, when thus prepared, it much resembles.” Infusion of senna may be procured of any respectable druggist. It will take about one or two tablespoonfuls, or even more, of the infusion (according to the age of the child and the obstinacy of the bowels), to act as an aperient. Of course you yourself will be able, from time to time, as the need arises, to add the milk and the sugar, and thus to make it palatable. It ought to be given warm, so as the more to resemble tea. Honey, too, is a nice aperient for a child—a teaspoonful ought to be given either by itself, or spread on a slice of bread. Some mothers are in the habit of giving their children jalap gingerbread. I do not approve of it, as jalap is a drastic griping purgative; besides, jalap is very nasty to take—nothing will make it palatable. Fluid magnesia—solution of the bicarbonate of magnesia—is a good aperient for a child; and, as it has very little taste, is readily given, more especially if made palatable by the addition either of a little syrup or of brown sugar. The advantages which it has over the old solid form are, that it is colorless and nearly tasteless, and never forms concretions in the bowels, as the _solid_ magnesia, if persevered in for any length of time, sometimes does. A child two or three years old may take one or two tablespoonfuls of the fluid, either by itself or in his food, repeating it every four hours until the bowels be opened. When the child is old enough to drink the draught off _immediately_, the addition of one or two teaspoonfuls of lemon-juice, to each dose of the fluid magnesia, makes a pleasant effervescing draught, and increases its efficacy as an aperient.