Process of Displacement. 
317 
The next subject of M. Guilliermond's experiments was 
whether one portion of fluid would exactly displace another. 
On this head he says. 
I took thirty grammes of soft extract of Rumex, dissolved 
it in two hundred and fifty grammes of water, after which I 
mixed it with an inert powder, and subjected it to displace- 
ment; it required six hundred grammes of water to do this, 
and even then the whole of the extract was not recovered. 
I introduced an inert powder in an apparatus for displace- 
ment, and saturated it with alcohol. A layer of water was 
poured over it with the greatest care, according to M. M. 
Boullay, this would exactly displace the alcohol, let us see: 
The powder weighed six hundred grammes, it absorbed 
thirteen hundred of alcohol. I displaced this water and di- 
vided the products in proof glasses each holding two hundred 
grammes. The alcohol I employed marked 81j by the are- 
ometer of Gay Lussac. 
I therefore obtained but 400 grammes, of the original 
strength. I made another experiment with wine, with the 
following results : — 
I took an inert powder and saturated it with wine, it im- 
bibed 700 grammes. The first portions of the wine that 
passed through appeared to have undergone some modifica- 
tion, but I continued to add more till this action ceased, and 
the wine passed through unaltered, when this was accom- 
plished, 1 poured in water to displace the wine. I at first col- 
lected a quantity of liquid equal to that absorbed by the pow- 
der, but was much lighter coloured than the wine. I next 
collected 300 grammes which was less coloured, and so on till 
complete exhaustion. This experiment demonstrated that the 
The first glass contained 
" second 
" third 
" fourth 
" fifth 
81 
80 
72 
53 
40 
sixth 
seventh 
