Sulphate of Soda. NaO, SO3 4 +10 HO. Called also Glauber's Salt. Comp. Soda 19.25, Sulphuric

* On Urinary Deposits, p. 98. On Stomach and Renal Diseases, p. 49.

Med. Times, Dec. 2,1848. § Chemical Pathology of Cholera, p. 54, 1832.

Acid 24.85, Water 55.90, in 100 parts; or 1 Eq. Soda = 31, + 1 Sulphuric Acid - 40, + 10 Water = 90 = 161, Eq. Wt.

Med. Prop. and Action. Purgative, in does of oz. ss. - oz. j.; but when dried so as to expel the water of crystallization, half these quantities are sufficient. Its unpleasant taste, which is a great objection to its use, may be partially disguised by the addition of lemon-juice. " It operates," observes Dr. A. T. Thompson,* "upon the whole length of the intestinal canal, stimulating the orifices of the exhalent vessels, and consequently causing serous discharges in the form of thin watery stools." When added to freshly-drawn blood, it impedes coagulation, and the same effect is probably produced in the living body. It is particularly adapted for febrile and inflammatory states, when it may be advantageously combined with Cream of Tartar. In small doses it acts as a diuretic.

Dose, as a purgative, oz. ss. - oz. j.; as a diuretic, gr. lx. - gr. cxx. Incompatible!. Carbonates of Potash, Magnesia, and Lime; Nitrate of Silver; Acetate of Lead; the Chlorides of Calcium and Barium.

Therapeutic Uses. Similar to those of MagnesiAe Sulphas, for which it may be substituted.