On the other hand, the same remedy (soda sulphate), when given in larger doses of 1/2 oz., is a useful saline purge in inflammatory conditions, and is an ingredient in several natural aperient waters: if given with sulphate of magnesia or acid tartrate of potash, smaller doses (1 to 2 dr.) may be used. The phosphate of soda acts in the same manner on the intestinal tract, and has a more decided diuretic action; it renders the urine alkaline. Tartarated soda is an ingredient of Seid-litz powders.