USEFUL METALS 163 



a ml 22.5 per cent, cadmium. Cadmium is used also in t In- 

 tuit annia ware and soldering German silver. A soft solder con- 

 sist ing of 37 parts lead and 63 parts tin, and 8 parts cadmium 

 fuses at 36. Cadmium is used also in cadmium plating, especi- 

 ally with tin, where the coating is hard and takes a high polish. 

 Cadmium is used somewhat with mercury as an amalgam in the 

 filling of teeth. Cadmium salts are well known in the chemical 

 trade. 



