GLUCINA. 32,5 



is, that the mean of the two will give an atomic 

 weight not very far removed from the truth. 



Atomic weight from beryl 3-5668 



euclase 3-1719 



2)6-738? 



Mean . . = 3-36935 



This result, though too high, is much nearer the 

 truth than that derived from the analysis of beryl 

 alone. 



4. I shall now relate the experiments by which Analysis of 

 I satisfied myself that 3'&5 is the exact atomic of giucina 



. , . f . ! by the 



weight or glucina. author. 



(1.) I prepared a quantity of bisulphate of 

 glucina precisely in the same way as had been 

 previously done by Berzelius : 18*875 grains of 

 this salt were put into a platinum crucible, and 

 exposed for some time to a strong red heat : 

 there remained 3 f &5 grains of pure glucina. 



(2.) 18-875 grains of the same salt, and 26\5 

 grains of chloride of barium, were dissolved in 

 separate portions of distitled water. These two 

 liquids being mixed, a double decomposition took 

 place sulphate of barytes falling to the bottom, 

 while muriate of glucina remained in solution. 

 This liquid, as soon as it had become transparent, 

 was tested by sulphate of soda and muriate of 

 barytes ; but was not affected by either of these 

 reagents, showing that it contained no sensible 



x 3 



