CRAYON

n. Kra-3To3na. Fr., c. A stick containing substances for external application. There are five preparations official under this title in the Fr. Cod., containing nitrate of silver and nitrate of pota ium, sulphate of copper, tannic acid, and iodoform. C. caustique (Fr.). A stick of caustic (e. g., of silver nitrate). C. dermographique (Fr.). Of Pyrlas, a preparation made by melting together 5 parts of rosin, 4 of stearin, and 2 of wax, and stirring in a sufficient quantity of lamp-black; used for marking on the skin. [L, 77 (a, 21).] [s. 438]