3. (Dr Darcq.) Into a flat watch glass pour from 8 to 10 drops of highly concentrated liquor of ammonia; cover the liquid with a small piece of linen of rather less diameter than that of the glass, and at once apply this little apparatus to the previously shaved skin. The whole must be kept in its place by means of moderate pressure with the fingers, until a red ring, about 2 centimètres in breadth, is observed round the glass, when it is certain that vesication is effected. Sometimes scarcely 30 seconds are necessary for obtaining the result. The apparatus may then be removed, and the blistered part treated in the usual manner; the dressing being according to the object in view.
4. (Trousseau.) Bibulous paper slightly wetted with a little of the ethereal extract of cancharides, and instantly applied to the skin, the whole being covered with a piece of common adhesive plaster to prevent evaporation.
5. Boiling water applied by means of a suitably shaped tube, the adjacent parts being at the same time protected from injury. Instantaneous.
Blister, Horse. See Veterinary Medicines.
Blister*, Perpet′ual. See Blister (antè).
BLIS′TERING. Syn. Ves′icans, Vesicato′′rius, L.; Epispastique, Vésicant, Vésicatoire, Fr.; Blasenziehend, &c., Ger. In medicine, &c., that vesicates or raises blisters when applied to the skin.
Blistering Pa′per, Plas′ter, Tis′′sue (tĭsh-ū), &c. See Plasters, Vesicants, &c.
BLOAT′ER. See Blote.
BLONDE. [Fr.] Syn. Blond′-lace. Silk-lace. The name is now also applied to cotton-lace edged with silk. For the mode of cleaning it and getting it up, see Lace and Muslin.
BLOOD (blŭd). Syn. San′′guis, L.; Sang, Fr.; Blut, Ger. The general circulating fluid of animals, and that on which the nourishment and growth of their bodies depend, and from which all the secretions are formed. It is warm and red in vertebrated animals; and, for the most part, cold and white in the invertebrata. In man and all other mammals, and in birds—the two highest classes of the animal kingdom—the blood, though collectively forming but one circulating stream, varies considerably in appearance according to the part or vessels in which it is found. That contained in the left side of the heart, and in the arteries, possesses a very brilliant scarlet colour, and is called arte′′rial blood; whilst that found in the right side of the heart, and in the veins, has a darkish purple colour, and is called ve′nous blood. The two, however, differ little from each other in their chemical properties and composition; the most marked point of difference being that venous blood holds carbonic acid in solution, whilst oxygen predominates in the blood of the arteries. The fibrine of venous blood is also soluble in a solution of nitrate of potassa; whilst that of arterial blood is insoluble in that menstruum.