CHROMIUM. .JO 



Tims, we see that the constituents of this mu- 

 riate are 



1 atom muriatic acid . 4-62.5 



1 atom protoxide of chromium 4-500 

 9 atoms water . . 10-125 



19*25 



for this is just the weight of salt formed from 4-5 

 of protoxide of chromium. 



These 192*5 grains of muriate of chromium chloride of 

 were exposed in a close vessel to a heat raised c 

 very slowly nearly to redness. It had not un- 

 dergone fusion, and was still a powder having 

 an olive green colour. It weighed 82 grains. 

 Had it been reduced to a pure anhydrous chlo- 

 ride of chromium, the weight would have been 

 80 grains ; for it consisted (abstracting the 

 water) of 



Muriatic acid 46*25 



Protoxide of chromium 45 



91-25 



When converted into chloride it would lose 10 

 atoms of water, or 11-25. Now, 91*25 11-25 

 = 80. In the preceding experiment the muriate 

 had not been completely, though very nearly, re- 

 duced to a chloride. When I subjected the 

 muriate of chromium to a strong red heat, the 

 loss of weight was always too great, owing to 



D3 



