OF CADMIUM. 365 



paper, were decomposed by sulphuric acid. The 

 anhydrous sulphate of cadmium weighed 17'4 

 grains, equivalent to 1O7007 grains of oxide of 

 cadmium. Hence, the constituents of the salt 

 are 



1 atom acetic acid 6 25 



1 atom oxide of cadmium 8-00 



2 atoms water 2-25 



16-5 



8. Oxalate of cadmium. This salt is precipi- 

 tated when oxaiate of potash is dropped into ni- 

 trate of cadmium ; it is a white, tasteless pow- 

 der, insoluble in water. When iy-06 grains of 

 this salt, previously dried in the open air, were 

 cautiously heated on the sand bath in a platinum 

 crucible, the loss of weight was 3'62 grains : 

 hence, the constituents of this salt are 



1 atom oxalic acid 4'5 



1 atom oxide of cadmium 8-0 

 3 atoms water 3 '3 75 



15-875 



9. Tartrate of cadmium. If tartrate of potash Tartrate, 

 be added in slight excess to a solution of nitrate 

 of cadmium, there instantly falls a pretty bulky 

 precipitate. The liquid separated from .this 

 precipitate by filtration, deposites at the end of 

 twenty-four hours a small quantity of transpa- 

 rent granular crystals ; the supernatant liquid 

 still gives a slight precipitate with carbonate of 



