1102 Wisconsin Academy of Sciences, Arts, and Letters. 
for the commercial preparations were somewhat lower, due, in 
two cases, to the presence of unevaporated solvent. In the third 
instance, the low saponification value obtained was very probably 
due to a difference in the quality of the lupulin from which the 
oleoresin was extracted. The results obtained in the examina¬ 
tion of laboratory and commercial preparations follow. 
Table 103 —Saponification values of oleoresins prepared in the 
laboratory. 
Sample 
No. 
Date 
Observer 
Solvent 
Saponifica¬ 
tion value 
1 
191 6 
DuMez... 
Alcohol... 
223.4 1 
2 
Acetone. 
239.6 
3 
“ 
“ 
Ether..... 
230.8 
4 
“ 
.4 
Renzin... 
227.4 
1 Contained ether. 
Table 104 —Saponification values of commercial oleoresins. 
Sample 
No. 
Date 
Observer 
Source 
Saponifica¬ 
tion value 
1 
2 
3 
1916 
DuMez... 
Lilly & Co. 
158.8 1 
220.0 
223.3 2 
Sharp & Dohme. 
Squibb & Sons. 
2 Probably contained unevaporated solvent (alcohol). 
2 Contained ether. 
Iodine value: The oleoresin, when prepared with acetone, 
ether, or benzin, was found to have an iodine value varying 
from 94.7 to 96.2. When alcohol was the solvent employed 
in its preparation, the value obtained was considerably lower, 
namely, 82.05. A comparison of thse values with those found 
for the commercial samples indicates that alcohol is sometimes 
used in their preparation. The extremely low value obtained 
for the oleoresin of Lilly & Co. is to be attributed to the pres¬ 
ence of unevaporated solvent (alcohol) as well as to the effect 
produced by its use as a menstruum. The iodine values ob¬ 
tained for the preparations examined in the laboratory are 
given in the tables which follow. 
