Cabinet Calcium Carbonate
with the finest emery ground into a paste with oil. (See Agate Burnisher.)
Cabinet. A special size of the commercial photograph, which measures about 6 by 4 ins.
Cadmium. A metal which accompanies zinc, the compounds of which are much used in photography.
Cadmium and Ammonium Bromide (Ger., Einfach-am-moniu?n-cadmiumbromid ; Fr., Bromure double de cadmium et dammonium ; Ital., Bromuro doppio di cadmio e d'ammonia). 2CdBr22NH4BrH20 = 758. This salt is preferred to the simple bromide for collodion work on account of its greater solubility.
Cadmium and Ammonium Iodide (Ger., Zweifach am-monium~cadmiumiodid; Fr., Iodure double de cadmium et a"ammonium; Ital., Ioduro doppio di cadmio et d'ammonio). Cdl2, 2NHJ, 2FL,0 = 565. One part is soluble in 07 parts of absolute alcohol and in r8 parts of alcohol and ether (1 :1). It is used in the collodion process, and is preferred to the single salt on account of stability and solubility.
Cadmium Bromide (Ger., Cadmiumbromid, or Bromcad-mium; Fr., Bro?nure de cadmium; Ital., Bromuro di cadmio). CdBr^F^O = 344. One part by weight is soluble in 0.94 part of cold and 1 part of hot water, in 3.4 parts of absolute alcohol, in 250 parts of ether, and 16 parts of alcohol and ether (1 : 1). At iooo C. the crystals lose two molecules of water and all the water at 2000 C. It is used in the manufacture of bromised collodion.
Cadmium Iodide (Ger., Cadmiumiodid, or Iodcadmimn ; Fr. Iodure de cadmium; Ital., Ioduro di cadmio). Cdl2 = 366. This salt is formed in a similar manner to the bromide, and it is the most stable of all iodide salts. One part dissolves in 1.13 parts of water, in 0-98 parts of absolute alcohol, in 3.6 parts of ether, and in 2 parts of alcohol and ether.
Calcium Carbonate (Ger., Calciumcarbonat, Kohlensaures Kalk, Kreide; Fr., Carbonate de chaux; Ital., Carbonate di calce). CaC03 = 100. This occurs native in various forms, such as Iceland spar, marble, chalk, etc. It is almost insoluble in water, 0.007 per cent, being taken up by cold and 0.005 per