86 ANIMAL BASES. 



mains, showing that sulphate of odorin and copper has been 

 formed. By evaporation we obtain it of a green colour ; and 

 the excess of odorin may be gradually driven off. 



Acetate of copper behaves with odorin in the same way as 

 sulphate. When we mix an aqueous solution of this salt with 

 odorin, no precipitate falls, and when the mixture is left to spon- 

 taneous evaporation, in proportion as the excess of odorin is vo- 

 latilized, a double subsalt is deposited in four-sided short prisms, 

 having a grass green colour. This salt does not lose its odorin 

 though exposed to the air. It is soluble in water and alcohol, 

 but insoluble in ether. When distilled, odorin comes over first, 

 then acetate of odorin, and there remains in the retort acetate 

 of copper, mixed with brown subacetate, which has precipitated. 



Neither oxide of copper nor carbonate of copper is soluble in 

 odorin. 



When a solution of corrosive sublimate is mixed with muriate 

 of odorin, the two salts combine together, and when we evapo- 

 rate the liquid, an oil precipitates limpid-like water. This oil is 

 a double salt not altered by exposure to the air. When we mix 

 a solution of corrosive sublimate with a solution of odorin, a 

 subsalt precipitates in the form of a crystalline powder, which is 

 soluble in ten times its weight of boiling water, and which is 

 mostly deposited in crystals as the solution cools. If we boil the 

 solution, the odorin escapes with the steam, and nothing remains 

 but the corrosive sublimate. The anhydrous salt behaves in the 

 same way. It is soluble in alcohol and ether, and is slowly de- 

 composed when exposed to the air. 



When chloride of gold is mixed with muriate of odorin, a 

 double salt precipitates in small yellow crystals, soluble in twen- 

 ty times their weight of boiling water. . The solution of this salt 

 reddens litmus-paper. It is more soluble in alcohol than in 

 water, and is insoluble in ether. It may be fused, but in that 

 case is easily decomposed into muriate of odorin, chlorine, and 

 metallic gold ; dilute acids dissolve it at a boiling temperature, 

 and it is again deposited unaltered as the liquid cools. 



When odorin is mixed with chloride of gold, a yellow saline 

 powder precipitates, which is a double subsalt almost insoluble 

 in cold water, slightly soluble in boiling water, but again preci- 

 pitated as the solution cools. It is not altered by exposure to 

 the air, and may be fused without undergoing decomposition. 



