Du Mez—The Galenical Oleoresins. 
999 
Table 18 — Commercial oleoresins—Loss in weight on heating. 
Sample 
No. 
Date 
Observer 
Source 
Per cent, 
of loss on 
heating 
1881 
Germany . 
At 100° C 
2.70 
1.15 
1.60 
1.75 
1.90 
2.32 
1. 
1893 
2........ 
3. 
“ 
1. 
1894 
2 .. 
“ 
3 . 
3.65 
1.75 
1.62 
4.52 
4.72 
5.23 
r>.52 
7.38 
2.96 
3.09 
5.06 
7.51 
2.43 
1895 
“ 
| 
1896 
44 
1. 
1897 
“ 
.. 
•) 
1. ....... 
1901 
1. 
11903 
44 
2_ .... 
“ 
1. 
3.904 
2. 
St ■ 
1905 
2. 
“ 
1913 
Hill ... 
Europe . 
2. 
2 44 
3 _.... 
*• 
England . 
2.57 
4 . 
“ 
Europe .... 
2.69 
5. ....... 
“ 
3.55 
3.63 
3.65 
4.23 
4.40 
4.57 
ti. 
“ 
44 
7 . 
“ 
“ 
8 . 
“ 
9 . 
44 
10. 
“ 
“ 
11. 
“ 
.4 
4.64 
4.84 
5.03 
5.22 
12. 
*> 
ss 
13. 
*• 
Enarl and. 
14... 
“ 
Europe. 
15. 
6.500) 
6.52 (») 
6.60 (!) 
6.68(0 
At 100tol05°C 
3.20 
3.25 
6.85 
At 110° C 
1.75 
2.03 
6.01 
7.18 (M 
16. 
“ 
17. 
“ 
“ 
18. 
“ 
44 
1. 
W14 
Linke..... 
Bruckner, Lampe & Co.... 
Caesar Loret.z. 
2..___ 
3. 
“ 
“ 
Merck & Co. 
1. 
1916 
DnMez... 
Parke, Davis & Co......... 
2. 
Stearns & Co. . 
3. 
“ 
ss 
Lilly & Co. 
4.. 
“ 
44 
Souibb & Sons. 
(0 Unevaporated solvent (ether) was present. 
Ash Content: The results of this nature reported in the lit¬ 
erature, as well as those obtained in the laboratory, indicate 
that the ash content of the oleoresin, when prepared with ether, 
seldom exceeds 0.50 per cent, which is the standard given in the 
Belgian and Spanish pharmacopoeias. With respect to the 
commercial samples examined in the laboratory, the high ash 
content obtained was due to the presence of copper, evidently 
a result of the use of copper utensils in the manufacture of these 
preparations. The results of the determinations made in the 
