Kiihne and Chittenden— Peptones. 251 
cent. sodium carbonate, warmed with trypsin at 40° C., and after the 
antialbumid had partially separated as a jelly-like mass, it was 
filtered and washed with water, finally with alcohol and ether. This 
product could not possibly contain any known albumin, albumose or 
peptone and undoubtedly formed the purest sample of antialbumid 
yet prepared. 
By decomposing this body with sulphuric acid, a residue was 
finally obtained which to our surprise gave but the slightest reaction 
for tyrosin with Millon’s and Hoffmann’s test, with Piria’s test no 
reaction whatever, and in spite of endeavors continued for weeks not 
a single crystal of tyrosin could be detected. Leucin was found in 
very small quantity and in addition there were seen large lustrous 
balls of crystals of some nitrogenous substance, too small in quantity 
to be identified. 
Heidelberg, ) 
G 5 
New Haven, § December, 1885. 
