es ie ea hor 
S Se ee ee ay = 
Sr ne eae etna or gcse oe gs 
Ty Bre 
G. F, Barker—Physiological Chemistry. 237 
detected by microscopic examination, which may have been 
_leucin, since Neukomm states that these glands, observed during 
tight’s disease afforded him this substance. On the other 
hand, however, Seligsohn affirms that the supra-renal capsules 
contain no leucin, while Virchow asserts that they contain it 
in large amount. 
The violet pigment which separated during the evaporation 
of the filtrate, was found to be insoluble in alcohol, ether, 
chloroform, carbonic disulphid, and benzol, Alkalies took up 
only a trace of it, perhaps only an impurity, the filtrate being 
wow, and the undissolved pigment remaining unchanged in 
color. Water was found to dissolve it readily when acidulated 
with any mineral acid; it was also dissolved by moderately di- 
lute acetic acid, on boiling. These acid solutions were yellow; 
and from them the entire coloring matter separated again in 
Violet flocks or the addition of ammonia. This pigment ap- 
pears therefore, to bea weak base. Unfortunately, the quanti- 
4. On the rational formada of Urea. 
Herz concludes an exceedingly interesting paper upon the 
“oMpounds of trioxethylenamic (triglycolamic) acid,* by com- 
* Ann. Ch. Pharm., exl, 264, Dec., 1866, 
