USES.--Externally: Liquor ferri chloridi and liquor ferri subsulphatis are sometimes used to stop bleeding from wounds or natural cavities of the body. They may be injected, applied by swab, or on absorbent material, which is packed into the wound or cavity. As a local application in pharyngitis, we use one part of the solution of ferric chloride with four parts of glycerine. In the same strength, diluted with water, the chloride may be injected into the uterus to stop hemorrhage. Again, a solution in the strength of two drachms to the pint of water, is employed as an enema to destroy ascarides. The objection to these solutions of iron is that they form heavy, nasty, tenacious clots when employed to arrest hemorrhage, and the clots are apt to decompose and favor sepsis. Therefore they should not be used if other means, as ligature, pressure, heat or cold can be utilized. Iron is regarded as a specific for erysipelas. It is given both internally and externally. ADMINISTRATION OF IRON.--The fluid preparations should be freely diluted; the solid preparations should be combined with protectives or inert remedies, either in powder or capsule form, or with stomachics as gentian root. Iron causes less gastric irritation and enters the blood more readily if given with or immediately after meals. In anaemia it should be given in increased doses. Overcome constipation by giving when necessary or combining iron with laxatives as linseed oil. GAMBIR--CATECHU An extract prepared from the leaves and twigs of Ourouparia Gambir (Hunter), Ballon (Fam. Rubiaceae). U. S. “An extract of the leaves and young shoots of the Uncaria Gambir, Roxb.” HABITAT.--Africa and Southern Asia. DESCRIPTION.--Irregular masses or cubes; reddish-brown, pale brownish-gray or light brown; fracture dull-earthy; friable, crystalline; inodorous, bitterish, very astringent, with a sweetish after-taste; free from starch. Not less than 70 per cent should be soluble in alcohol. CONSTITUENTS.--Catechutannic acid (about 45 per cent) is the active principle; it is converted into the isomeric inactive catchnic acid, or catchin, by the saliva and by boiling, a red color being developed. There is also pyrocatechin or catechol. INCOMPATIBLES.--Alkalies, metallic salts and gelatine. DOSE.--Horses, ¹⁄₂ to 1 oz.; cattle, 1 to 2 oz.; sheep and pigs, 1 to 2 dr.; dogs, 5 to 30 gr. PREPARATIONS TINCTURA GAMBIR COMPOSITA--COMPOUND TINCTURE OF GAMBIR Composed of gambir, 50; cinnamon, 25; alcohol to make 1000. DOSE.--Horses, ¹⁄₂ to 2 oz.; cattle, 1 to 3 oz.; sheep and pigs, ¹⁄₂ to 1 oz.; calves and foals, ¹⁄₂ to 1 oz.; lambs, 10 to 30 m.; dogs, ¹⁄₂ to 1 dr. The above doses can be considerably increased and are good in cases of diarrhoea of small and young animals.