Regarding the preparation of these paints, the following may be said: The prepared talc is passed through a fine-meshed sieve into a porcelain dish. The carmine is rubbed fine in a porcelain mortar and then triturated with water[25] in the same mortar until no more specks of carmine are visible. Now add the dissolved carmine to the talc in the porcelain dish, stir thoroughly with a horn or wooden spoon, and gradually add sufficient rose water to form a dough-like mass. Then add to this mass about 1¾ ozs. of gum-tragacanth mucilage, prepared 3 or 4 days before from 2¼ drachms of pulverized gum-tragacanth and 3½ ozs. of water, work the mass thoroughly through, and add the 5½ drachms of best olive oil. The oil being also incorporated with the mass, mix in the 1 oz. of _Extrait rose_ or alcohol, and again work the mass thoroughly through, when the paint is ready to be brought upon porcelain plates. [25] For fine preparations, rose water is used; for ordinary, distilled water. The procedure is now as follows: By means of a spoon bring a quantity of the paint, about the size of three hazelnuts upon the centre of a porcelain plate, spread it out uniformly to the edge of the plate by knocking the latter against the table, and in the same manner cover 6 or 8 plates. These are the test-plates. Tie a piece of paper over the dish containing the rest of the paint and set it aside. Place the plates coated with paint in a dry place to dry, but do not expose them to sunlight, nor should soaps be kept in the room, as in both cases the paint would become blue. After 12 to 18 hours the paint upon the plates will be dry, and now comes the most difficult part of the manipulation. With a small horn-knife or the sharp edge of a playing card scrape off very carefully and uniformly a small quantity from the surface of the paint, proceeding from the edges towards the centre of the plate. Then, to see whether the paint adheres firmly to the plate, knock the edge of the latter quite vigorously against the table. If it adheres firmly, cover the entire plate with a piece of watered silk, catch the ends of the latter beneath the plate with the left hand, and, with the palm of the right, run quite hard over the silk. By this means the moiré of the silk is imprinted upon the paint, giving it a nice appearance. Proceed in the same manner with the six or eight test-plates, and if the paint upon them bears the manipulation without dropping off, work up the rest of the paint in the dish. If, however, the paint does not adhere to the plates, it is proof of it containing not enough gum-tragacanth. In this case add some of the mucilage to the paint in the dish, work it thoroughly through, and proceed in the manner described. Packing, labelling, etc., being subject to fashion, need not here be described, but as the charm of novelty contributes much to the sale of an article, the manufacturer should make it his business to invent new attractive