362 SALTS 



While the analysis in my laboratory gave 



Nitric acid 6-750 



Oxide of cadmium 7 '933 

 Water 4-608 



19-291 



The mean of both gives the atomic weight of 

 cadmium 8-023, and of the salt 19'2485 ; both of 

 which are exceedingly near the truth. 

 Carbonate, 3. Carbonate of cadmium. This is a white 

 tasteless powder, having a certain resemblance 

 in colour to white lead. It is destitute of com- 

 bined water, but when dried in the open air re- 

 tains the fifth part of an atom of water, no doubt 

 hygrometrically united to the salt. Its consti- 

 tuents (abstracting this water) are 



1 atom carbonic acid 2 - 75 



1 atom oxide of cadmium 8 



10-75 



Phosphate, 4. Phosphate of cadmium. This salt was 

 formed by mixing together solutions of nitrate 

 of cadmium and phosphate of soda. The pre- 

 cipitate is at first very bulky, but afterwards di- 

 mishes much in volume ; it is tasteless and inso- 

 luble in water. 21 ! grains of this salt dried 

 in the air, when exposed for 20 minutes to a low 

 red heat, were reduced to 18*905 grains. In a 

 very strong red heat it was reduced to a semi- 



