1112 Wisconsin Academy of Sciences, Arts, and Letters . 
Table 110 —Specific gravities of commercial oleoresins. 
Sample 
No. 
Date 
Observer 
Source 
Specific 
gravity 
1.. 
1916 
DuMez.... 
Sharp & Dohmb........... 
At 25° C 
0.943 
0.984 3 
1.008 2 
> 
Squibb ft Sons... 
L........ 
“ 
Merck & Go... 
1 Apiol, fluid,—Squibb. 
2 Apiol, fluid, green,—Merck. 
Refractive index: Observations made in the laboratory in¬ 
dicate that the oleoresin should have a refractive index of 
about 1.477 at 25°C, when ether or acetone are employed in the 
extraction of the drug. A result almost identical with the 
preceding was obtained for the only commercial sample ex¬ 
amined. The refractive indices observed in the case of the 
so-called liquid apiols were somewhat higher, due very likely 
to the use of alcohol in their preparation. The data given in 
the following tables illustrate these points. 
Table 111 —Refractive indices of oleoresins prepared in the laboratory. 
Sample 
No. 
Date 
Observer 
Solvent 
Refractive 
index 
1 
1916 
DuMez.... 
Acetone.................... 
At 25° C 
1.477 
2 
ICther...._............... 
1.477 
Table 112 —Refractive indices of commercial oleoresins. 
Sample 
No. 
Date 
Observer 
Source 
Refractive 
index 
1916 
DuMez..................... 
Sharp & Dohme........... 
At 25° 0 
1.475 
2 
Squibb & Sons............. 
1 486 1 
3 
.6 
Merck & Co... 
1.1488 s 
1 
1 Apiol, Fluid—Squibb. 
2 Apiol, Fluid, Green,—Merck. 
