Chemical Scicnco. 623 



0.642 parts of chloride took up only 0.115 parts of gas, which is 100 

 parts of the former to 17,91 of the latter; 1 atom of chloride unites 

 accordingly with 3 atoms of ammonia, or 100 parts of the former 

 with 17.92 of the latter. 



If Chloride of Mercury is brought into contact with ammonia, 

 it becomes black, but on a gentle heat, or by exposure to air, as 

 well as by acids, the white colour is restored, and ammonia emitted ; 

 1.382 parts of the chloride were found to combine with 0.102 parts 

 of ammonia, or 100 parts of the former with 7.38 of the latter, 

 which corresponds to 1 atom of chloruret and 1 atom of ammonia, 

 or 100 parts of the former and 7.21 of the latter. 



At the common temperature, the Chloride of Mercury was found 

 to combine very slowly with ammonia ; but on applying heat to the 

 chloride, the absorption was much more rapid ; afterwards 0.965 parts 

 of chloride were found to have taken up 0.050 of ammonia, or 100 

 parts 5.78 of ammonia. The compound does not dissolve in water, 

 but in every other respect resembles the chloride ; if boiled with 

 water, it forms a yellow precipitate ; on being heated, it is first melted, 

 and then volatilized, without emitting its ammonia. It may be 

 considered as consisting of 1 atom of chloride, and 1 atom of am- 

 monia, equal to 100 parts of the former and 6.27 of the latter. 



Chloride of Antimony and ammonia do not combine at the com- 

 mon temperature ; but on being fused, in contact with ammonia, the 

 chloride is changed into a brittle substance, which does not become 

 fluid in the air, like the chloride. It was examined in the following 

 manner: 1,675 parts of the compound were dissolved in tartaric acid, 

 the solution was diluted with water, and the antimony precipitated 

 by sulphuretted hydrogen ; to the filtered liquid a small quantity of a 

 solution of sulphate of copper, and then a solution of the nitrate of 

 silver was added, by means of which 2,833 parts of chloride of 

 silver were precipitated. The compound accordingly consisted of 

 100 parts of antimony, and 8.19 of ammonia, or 1 atom of the former 

 and 2 atoms of the latter, which are equal to 100 parts of chloride, 

 and 7.29 of ammonia. 



The Chlorides of Sodium and Barium could not be made to com- 

 bine with ammonia. 



Of the compounds of ammonia with bromides, iodides, and cyan- 

 ides, I have examined but very few : of which I shall only mention 

 the following : 



At the common temperature, the Bromide of Quicksilver and Am- 

 monia do not combine ; but if the bromide is heated in an atmos- 

 phere of ammonia, its weight increases by 3.41 per cent., which may, 

 perhaps, be considered as = 1 atom of bromide, and 1 atom of ammo- 

 nia, equal to 100 parts of the former, and 4.78 of the latter. In its 

 properties, it is very similar to the compound of chloride of mercury 

 and ammonia. 



Under the action of ammonia, the red colour of the Iodide of 

 Quicksilver is changed into a dirty white ; 100 parts of the iodide 



