680 sulphid, K2S. 2

P. hydro sulphid, HKS. 3. P. tri sulphid, a brownish crystalline substance, K2S3, soluble in water. It enters into the composition of pota a sulphur at a. 4. P. tetra sulphid, K2S4. 5. P. pent a sulphid, a reddish brown ma , K2S5, easily soluble in water and of bitter, alkaline taste. See also pota a sulphur at a, under pota a. p. sulphite. The compound K2SO3 + 2H2O, of bitter saline and sulphurous taste, without odor, and soluble in 4 parts of cold water. There is also an acid p. sulphite or p. bisulphite (Lat., pota i i bisulphis), KHSO3, • forming acicular crystals of sulphurous taste and neutral reaction [U. S. Ph., 1880]. p. tartrate. A compound of p. and tartaric acid. Normal p. tartrate (the p. tartrate of the pharmacopeias), K2QH4O6 —according to the Br. Ph., (CHOH)- COOH.COOK — occurs as small transparent or white crystals or as a white powder of bitterish saline taste, readily soluble in water. Acid p. tartrate, p. bitartrate, or cream of tartar. Lat., pota i i bitartras [U. S. Ph.] {tartras acid us [Br. Ph.]). p. thiosulphate. A salt, taste, K2S2O3. It enters into the composition of liver or sulphur. See pota a sulphur at a, under pota a. trochi sci pota i i chloratis. Troches of p. chlorate combined with sugar, Tolu balsam, etc. The U. S. and Br. lozenges contain about 2T/2 grains of p. chlorate [U. S. Ph., Br. Ph.]. unguentum pota i i iodid i. An ointment containing 10 per cent, of p. iodid [U. S. Ph., Br. Ph.]. [Lat.] potency medicine. (po'ten-se). The strength In homeopathy the power of ofa a medicine developed by certain procedures of attenuation or trituration. potent i a coeundi (po-ten's he-ah ko-e-un'- di). Ability completely to perform sexual intercourse. [Lat.]