1082 Wisconsin Academy of Sciences, Arts, and Letters . 
acetone. For the preparation in which ether was employed as 
a menstruum in extracting the drug, a saponification value of 
102.9 was obtained. The comparatively low values obtained for 
the commercial samples examined are to be accounted for by 
the fact that in all cases, they contained nearly twice as much 
volatile matter (presumably essential oil) as the laboratory 
preparations. The values found for this constant are given in 
the tables which follow. 
Table 85— Saponification values of oleoresins prepared in the laboratory. 
Sample 
No. 
Date 
Observer 
Solvent 
Saponifica¬ 
tion value 
1 ......... 
1916 
DuMez... 
Alcohol_................. 
119.4 
2.... 
Acetone ................... 
108.4 
3. .. 
“ 
110.4 
4 . 
“ 
“ 
105.7 
«.. 
‘‘ 
Ether ...................... 
102.9 
5.. ....... 
Petrol, ether .............. 
78.1 
Table 86— Saponification values of commercial oleoresins. 
Sample 
No, 
Date 
Observer 
Source 
Saponifica¬ 
tion value 
1 .. . 
1916 
DnMez ...............___ 
Sharp & Dohme........... 
94.1 
98.4i 
89.9 
2 .. 
Squibb & Sons............. 
3 
66 
Lilly & Go.. 
1 Contained a trace of ether. 
Iodine value: Iodine values of 122.4 to 124.1 were ob¬ 
tained for the oleoresin when prepared with acetone. The 
preparations made with alcohol or ether gave values very 
near the same, whereas, the value of this constant was some¬ 
what higher (126.9) when petroleum ether was the solvent em¬ 
ployed. With respect to the commercial samples, the values 
found were lower in all cases. In one instance, this was due 
to the presence of unevaporated solvent, while, in the other cases 
it is to be attributed to the relatively large amount of volatile 
matter (essential oil) present. The iodine values found for the 
preparations examined in the laboratory follow. 
