106 
ON ALCOHOLIC TINCTURES. 
the solvent, which is that which takes up the greatest quan- 
tity of extractive matter from this substance. 
8. Wormwood. 
grs. 
15 gr. by 60 
gr. 
or 4 pts. ale. at 80° total ext. 
2-20 
a 
75 
a 
5 
u 
id. 
(t 
2-67 
a 
60 
6C 
4 
(C 
56 
a 
291 
a 
75 
a 
5 
a 
id. 
a 
3-5S 
a 
96 
6 
u 
id. 
a 
311 
n 
75 
a 
5 
a 
45 
a 
353 
u 
90 
a 
6 
(6 
id. 
a 
3-50 
20 grammes of the tincture, prepared with one part of 
wormwood, and five parts of each of the different degrees 
of alcohol mentioned above, were diluted with the same 
quantity of water (400 grammes); the bitter taste of all 
these tinctures, although much reduced, could still be per- 
ceived, but I could not establish the difference in the degree 
of bitterness presented by each. This fact I had proved by 
others, not wishing to trust to myself alone. 
As all these tinctures possessed the same properties, since 
it is the bitter principle we are in search of in this medica- 
ment, and, as in the preceding case, this tincture is also ad- 
ministered in an undiluted state, I saw no necessity for 
changing the strength of the alcohol prescribed by the 
Codex. 
I therefore employed alcohol at 56°, in the proportion of 
five parts, which, as we see in the table, furnishes the 
greatest quantity of extract. 
9. Gentian, 
grs. 
1 pt. 15 gr. by 60 gr. or 4 pts. ale. at SO total ext. 4-75 
« 75 " 5 " id. " 4-89 
" 75 " 5 " 70 " 5-34 
" 90 " 6 " id. " 5«29 
" 60 " 4 " 56 " 5.24 
" 75 5 " id. " 5-22 
" 75 " 5 " 45 " 4-95 
