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Selected Articles, 
slowly, that in four days I obtained only 20 grammes of ex- 
tract from 700 of fluid. In the last treatments the fluid flowed 
through with greater rapidity, from a cause observed by M. 
Robiquet; the mass having contracted, several fissures were 
formed, through which the liquid passed with such rapidity as 
to become but little charged, so that 108 grammes of water 
gave only 2 of extract. 
With 300 grammes of powder, macerated in 1425 of water, 
I obtained 82 grammes of extract. 
Let us now see the result of the third mode of operating 
by macerating the powder before submitting it to the process 
of displacement. 
Liquorice. — Powder, 330 grammes, macerated for twenty- 
four hours in a kilogramme of water, then placed in a funnel; 
this permitted 400 grammes to escape, and the subsequent 
results were: 
I. 
treat. 400 grams. 
gave 21 
2. 
" 100 
9 
3. 
" 100 
9 
4. 
" 100 
8 
5. 
" 100 
8 
6. 
" 100 
7 
7. 
" 100 
6 
8. 
" 100 
4 
9. 
" 100 
3 
10. 
" 100 
2 
11. 
"* 100 
2 
1400 
79 
The quantity of extract is less considerable than by con- 
tinued displacement, but it is greater than by maceration 
alone, as I obtained 97 by displacement, 79 by maceration 
and displacement, and 59 by maceration. It is to be noted 
that the quantities of water employed in the formation of 
these extracts, were about in the same proportion, 1200 by 
displacement, 1400 by displacement and maceration, and 
2120 by maceration. 
