' to watch the 
Chemistry. : 415 
5. Ona new method of detecting and preparing the organic alkaloids, 
—Erpmann and von Ustar have given a new method of separating the 
organic alkaloids which depénds upon the fact that the free bases are 
easily soluble in hot amylic alcohol, while their chlorhydrates are so in- 
acid, the extract treated with ammonia to set free the bases, and evapo- 
rated. The alkaloid may then be dissolved with hot amylic alcohol, the 
from six to ten drops of concentrated sulphuric acid; a 
U-shaped tube, seven-eighths of which are 
eighth with chlorid of calcium. Lastly, a t ‘ 
tic potash is added; this is not weighed, but serves to prevent the influ- 
ence of the air. : oe x 
The chlorid of ealeium tube and the U-shaped tube with the sulphuric 
cid are weighed together: the sulphuric acid tube enables the operator 
progress of the analysis. @ -lime absorbs 
The soda-lim the car- 
