Du Mez—The Galenical Oleoresins. 
1055 
Table 50 —Specific gravities of commercial oleoresins. 
Sample 
No. 
Date 
Observer 
Source 
Specific 
gravity 
1. 
1866 
Procter.. 
Not given. 
At 76° F. 
0.900 (D 
At 25° C. 
0.968 
0.969 
1. 
1916 
DuMez... 
Lillv & Co. 
2.. 
Squibb & Sons... 
3. 
«« 
Parke. Davis & Co. 
0.971 
0.975 
4. 
“ 
•* 
Sharp & Dohme. 
5. 
“ 
Stearns & Co. 
1.017 
1 Contained ether. 
Refractive index: The results obtained in the laboratory in¬ 
dicate that the refractive index of the oleoresin should be about 
1.499 when determined at 25° C. The solvent employed in ex¬ 
tracting the drug appears to have little influence on this con¬ 
stant, except in case petroleum ether is used, when it is slightly 
lower. The effect due to variation in volatile oil content is but 
slight as is shown in the tables which follow: 
Table 51. — Refractive indices of oleoresins prepared in the laboratory. 
Sample 
No. 
Date 
Observer 
Solvent 
Refractive 
index 
1. 
mo 
DuMez & Netzel.... 
Alcohol. 
At 25° C 
1.495 
1.499 
2. 
Acetone. 
3......... 
“ 
ft* 
Ether.. 
1.499 
1.502 0) 
1.500 
1.500 
1. 
1.916 
DuMez . 
Alcohol. 
2. 
Alcohol... .. 
3. 
*• 
“ 
Acetone. 
4. 
Cft 
ft* 
Ether. 
1.499 
1.495 
5. 
•» 
Petrol ether. 
O) Low in volatile oil content. 
Table 52 — Refractive indices of commercial oleoresins. 
Sample 
No. 
Date 
Observer 
Source 
Refractive 
index 
1 .... .... 
1916 
DuMez... 
Lilly & Co. 
At 25 ° C 
1.498 
2. 
Sauibb & Sons. 
1.499 
3. 
Parke. Davis &. Co. 
1.499 
1.499 
4.. 
“ 
“ 
Sharp & Dohme. 
5. 
*• 
“ 
Stearns & Co.. 
1.501 
