being precipitable by acetic acid, alum, and acetate of lead.
CHOREA. [Syn. St. Vitus’s Dance.] A spasmodic disease affecting children and young persons, especially girls, between eight and sixteen years of age. It is caused by a debilitated condition of the nervous system, as well as by brain disease, scrofula, imprudent diet and worms.
The treatment recommended is the regulation of the bowels by mild purgatives. If the disease can be traced to worms, these should be removed by the proper remedies. If worms are not the cause, recourse should be had to the cold, or shower-bath. The hot hip-bath will be found serviceable in some cases. Where there is paleness of the skin any of the iron preparations will prove of great use, the bowels being kept regular. The best preparations of iron are either the tincture of the perchloride, or nitrate, or the citrate of iron and quinine. Some practitioners recommend arsenic—five drops of the solution (for an adult) twice a day after meals; others valerianate of zinc.
Treatment for the Horse and other Animals.—Similar to the above.
CHRISTOFIA is a stomachic brandy or wine made of 1500 parts white wine, 20 parts cinnamon, 10 parts cloves, 60 parts bitter almonds, digested several days; 300 parts of sugar and 500 of spirit are then added, and the whole filtered. (Hager).
CHROMACOME. For dyeing the hair black. This is said to be prepared from harmless vegetable materials, but really consists of pyrogallic acid and nitrate of silver.
Chromacome. This is a French preparation which “contains nothing injurious to health.” This hair dye consists of two fluids. The first, “Le chrômacome, teinture supérieure de William W. A. T., No. 1, Bonn,” weighing about 45 grammes, is tincture of galls. The other, No. 2, is a solution of acetate of iron with a little nitrate of silver. When grey hair is moistened first with No. 1, then with No. 2, it becomes blackish-brown or black.
CHRO′MATE. Syn. Chro′mas, L. A salt in which the hydrogen of (hypothetical) chromic acid, HCrO4, is replaced by a metal or other basic radical.
Chromates:—
Prep. The insoluble chromates, as those of barium, zinc, lead, mercury, silver, &c., may be made by mixing a soluble salt of those bases with neutral chromate of potassium. The first three are yellow; the fourth brick-red; and the fifth reddish-brown, or ruby red when crystallised. The soluble chromates may all be made by direct solution of the base in the acid, or by double decomposition. The chromates of commerce are prepared from either chrome ore or chromate of potassium.