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Hydrate of Alumina

Dissolve dry chloride of calcium. (Cooley.). alum in 6 times its weight of boiling water, 4262. Iodide of Cadmuim. This is add a solution of carbonate of potassa, in prepared by mixing iodine and cadmuim filings slight excess, agitate the mixture for a few in a moist state. This is freely soluble in minutes, and then allow it to repose. After water or alcohol, and may be crystallized by a time, pour the clear supernatant liquor from evaporation from ether solution, in large the precipitate or sediment, and wash the white transparent crystals. (U. S. Disp.) latter three or four times with tepid distilled 4263. Bromide of Cadmium. This is or soft water. Next collect the precipitate made from cadmium filings and bromine, in on a fine calico filter, and again wash it with the same manner as the iodide of cadmium tepid water. When it has drained, press it from iodine. It consists of long, white, efflobetween bibulous paper, and, lastly, dry it rescent, crystalline needles. either without heat, or at a temperature not higher than 120° to 130° Fahr. 'The product is a soft white powder. (Cooley.)