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A tumbler ....... \ / 10 ounces. A teacup ........ | | 6 " A wineglass .... | usually | 2 " A tablespoon..... |- contains -| 4 drachms. A dessertspoon... | about | 2 " A teaspoon....... / \ 1 " These quantities refer to ordinary sized spoons and vessels. Some cups hold half as much more, and some tablespoons contain six drachms. A medicine glass, which is graduated so as to show the number of spoonfuls it contains, should be kept in every family. [TO-DAY, MAN LIVES IN PLEASURE, WEALTH AND PRIDE.] 666. Process of Making Medicines. To Powder Substances.--Place the substance in the mortar, and strike it gently with direct perpendicular blows of the pestle, until it separates into several pieces, then remove all but a small portion, which bruise gently at first, and rub the pestle round and round the mortar, observing that the circles described by the pestle should gradually decrease in diameter, and then increase again, because by this means every part of the powder is subjected to the process of pulverization. In powdering substances, making emulsions, and whenever using a mortar, the pestle should always travel from the right to the left. 667. Preparation and Assistance. Some substances require to be prepared in a particular manner before they can be powdered, or to be assisted by adding some other body. For example, camphor powders more easily when a few drops of spirits of wine are added to it; mace, nutmegs, and such oily aromatic substances are better for the addition of a little white sugar; resins and gum-resins should be powdered in a cold place, and if they are intended to be dissolved, a little fine well-washed white sand mixed with them assists the process of powdering. Tough roots, like gentian and calumba, should be cut into thin slices; and fibrous roots, like ginger, cut slanting, otherwise the powder will be full of small fibres. Vegetable matter, such as peppermint, loosestrife, senna, &c., requires to be dried before it is powdered.