OF CADMIUM. 361 



1 atom sulphuric acid 5 



1 atom oxide of cadmium 8 



4- atoms water 4-5 



It is so apt to lose a portion of its water of crys- 

 tallization, that its analysis is not easily made ; 

 when it precipitates in a white crust it contains 

 only 2 atoms of water. 



2. Nitrate of cadmium. This salt, crystal- Nitrate, 

 lized in vacuo over sulphuric acid, formed thin 

 transparent plates ; they deliquesce when expo- 

 sed to the air, as Stromeyer had observed. 19 '25 

 grains of these crystals were dissolved in water, 

 and precipitated at a boiling temperature by 

 carbonate of soda. The carbonate of cadmium, 

 after ignition, weighed in one experiment 7*955 

 grains, and in another 7'912 grains. Hence, it 

 is obvious, that the constituents are 



1 atom nitric acid 6-75 



1 atom oxide of cadmium 8-0 

 4 atoms water 4-5 



19-25 



The constituents, as stated by Stromeyer, are as 

 follows : 



Nitric acid 6-884 



Oxide of cadmium 8-114 

 Water 4-208 



19-206' 



