318 Intelligence and Miscellaneous Articles. 



the acetic solution, by hydrochloric acid ; it yielded at a high tem- 

 perature the same products as the soluble crystalline salt. The acid 

 liquor with which it had been washed, deposited by evaporation 

 calomel in a mammillated form, and chlorate of peroxide of mercury 

 in crystals. When mixed with combustible bodies, protochlorate of 

 mercury gave as loud an explosion as the chlorate of silver. 

 This salt consists of 



Chloric acid 26-37 



Protoxide of mercury .. 73'63 

 100^ 

 PercMorate of Mercury. — By dissolving peroxide of mercury in 

 chloric acid and evaporation by the water-bath, perchlorate of mer- 

 cury was obtained in small tabular crystals. When these were 

 heated they yielded at first water and afterwards oxygen ; they are 

 then converted into a mixture of peroxide and perchloride of mercury, 

 the latter of which sublimes at 563° F. If the salt be rapidly heated, 

 it decomposes suddenly, and chlorine is one of the products. When 

 mixed with inflammable bodies, it usually inflames during the ope- 

 ration of mixing, but without detonation. Water decomposes it 

 into an acidulous soluble salt and an insoluble basic salt. If it be 

 triturated with chloride of sodium and a little water, it separates into 

 red oxichloride of mercury, and a neutral solution remains. 

 By analysis this salt was found to consist of 



Chloric acid 24-91 



Binoxide of m ercury . . 72-13 



Water 2-96 



10(>~ 

 Chlorate of Cadmium. — The solution of this salt, prepared by de- 

 composing chlorate of barytes with sulphate of cadmium, yielded by 

 evaporation over sulphuric acid, very deliquescent prismatic crystals 

 extremely soluble in alcohol. This salt melts at 176° F., and yields 

 water, oxygen and chlorine. When the heat has been sufficiently 

 great, the residue is a gray fused mass, formed of a mixture of oxide 

 and chloride of cadmium ; if this residue be treated with water, it 

 dissolves a portion of the chloride of cadmium ; another portion re- 

 mains and forms, by combining with the oxide of cadmium, a white 

 insoluble basic chloride ; the chloride of cadmium is so feebly com- 

 bined with the oxide, that the carbonic acid of the air is sufl[icient to 

 convert it into a mixture of carbonate and chloride of cadmium ; and 

 the latter may be dissolved out by water. 

 This salt was found to consist of 



Chloric acid 47*90 



Oxide of cadmium . . 40-56 



Water 11-45 



99-91 

 Chlorate of Bismuth. — The solution of oxide of bismuth in chloric 

 acid decomposes by concentration in vacuo ; it is then precipitated 

 to the bottom of the vessel as basic chloride of bismuth, and hypo- 

 chlorous acid is disengaged ; on these accounts it was impossible to 

 isolate the chlorate of this metal. — Journ, de Pkarm. et de Ch., Mai 

 1844. 



