ON TINCTURE OF KINO. 
95 
diately tried it on a small scale. This answered very well ; 
in a small instrument of my own construction, I was enabled 
to make a tincture, saturated with the astringent principle of 
the extract, in a few minutes. 
This apparatus I used to my entire satisfaction, until the idea 
struck me that, when made on a large scale, by the same me- 
thod, the tincture would be less likely to change than when 
the alcohol was allowed to stand two weeks on the material. 
I made a quantity of the tincture on the 1st of January, 1839. 
A considerable quantity still remains : it has not undergone 
the least change, is of a deep garnet color, perfectly transpa- 
rent, and of a powerfully astringent taste ; in short, I believe 
it to be just as good as it was the day it was made. In the 
tenth month of my experiment, an article was published in 
this Journal, by Mr. A. Duhamel, giving his experience on 
the same subject for the six months previous. 
Seeing the end thus answered, (that of giving publicity to 
an improved process,) I concluded not to write upon the sub 
ject, until now that nearly another year has elapsed, without 
having made any change in the tincture. I consider that a 
publication of the facts may induce others to adopt the same 
course. I give the formula employed by me in making the 
tincture by the improved process : 
Kino, giij. 
Alcohol, Oij. 
Reduce to a coarse powder, mix with an equal bulk of clean 
sand ; then place in the filter, and pass the alcohol through it 
in successive portions, until it passes colorless. 
I shall conclude by recommending the apparatus to all 
druggists who have not already adopted its use. 
No apothecary should be without it. The Boullay filter 
(as it is called) costs no more than a common funnel, and may 
be applied to every purpose in which that useful instrument 
is employed ; as a filter, it answers a better purpose than 
passing a turbid solution through paper, because it is less trou- 
ble, can be done in less time, and there is no breakage of fil- 
ters, which so frequently occurs when paper is used. You 
