SOD.E

"99

essential oils required, such as bergamotte, cedrat, neroli, musk,ambergrise, Florentine iris-root, civet, &c.

Soap. See Sapo, Starkey, &c.

Soda Caustica. P. Caustic Soda. Procured from marine vegetables,barilla, kelp, &c.

Soda Caustica Liquida, vel Lixivia Saponariorum. P. LiquidCaustic Soda. Take 500 parts of lime, 1000 of carbonate of soda,boil in q. s. of water, filter and evaporate till upon cooling theareometer stands at 36°, then leave it to settle. It is corrosive, ant-acid, and absorbent, and used in the same cases as Liquor Potass^.

SodjE Acetas. D. Acetate of Soda. Take what quantity may benecessary of carbonate of soda and q. s. of distilled vinegar; evapo-rate the strained solution to sp. gr. 1276, and preserve the crystalsformed by cooling in stopped bottles.Incompatible with the mineral acids and carbonate of lime.Medicinally it is a mild purgative in doses of 5j to $iv, in any bland

fluid.Adulterated with sulphates and muriates, the first of which may bedetected by saturating the carbonate of soda, and adding nitrate ofbarytes, which will precipitate sulphate of barytes, and the secondwill give a precipitate with nitrate of silver.Chemically this ought to be a bicarbonate of soda, but when it is dried,or the temperature the least elevated, the carbonic acid escapes, andthe crystals effloresce and fall down into a white powder, which isnot so easily soluble in water as the subcarbonate. It has beencalled a sesqui-carbonate. It contains 39 - 76 of carbonic acid, 38'55of soda, and 21*6"9 of water.Incompatible with acids, acidulous salts, lime water, muriate of am-monia, and earthy and metallic salts.Medicinally it has nearly the same properties as an antacid, and ab-sorbent, as the carbonate of potass, or the subcarbonate of soda, butis less nauseous than the latter. The dose is gr. x to 5ss.

Sod.se Carbonas. L. E. Sodce bicarhonas. D. Carbonate of Soda.Take tbj of subcarbonate of soda, Oiij of distilled water, dissolve thesubcarbonate in the water, put the solution in a proper vessel, passcarbonic acid through it till the soda is fully saturated, and set itaside that crystals may form; wrap the crystals in bibulous paper;evaporate the remaining liquor, taking care that the temperaturedoes not exceed 120°, that crystals may again form, which are to bepressed and dried in the same manner.

Sod^k Carbonatis Aqua. D. Water of Carbonate of Soda. Dissolveany quantity of carbonate of soda in distilled water, and evaporatethe solution to sp. gr. 10-24.