97 
100 parts of Walnut 
Holly - 
— Beech - 
— American Maple 
— Elm 
- — Norway Pine 
— Sallow - 
- — — Ash 
— ■ — — Birch - 
— — Scottish Fir 
$0,6 of charcoal 
19,9 
19,9 
19.9 
19,5 
19,2 
18.4 
17.9 
17.4 
16.4 
M. Gay Lussac and Thenard have concluded 
from their experiments on the wood of the oak and 
the beech, that 100 parts of the first contain: 
Of Carbon - - - 5$, 58 
— * Oxygene - - 41,78 
— Hydrogene - - 5,6 9 
and 100 parts of the second: 
Of Carbon - - 51,45 
■ — Oxygene - - - 4$, 73 
— Hydrogene - - 5,8$ 
Supposing woody fibre to be a definitive com- 
pound, these estimations lead to the conclusion, 
that it consists of 5 proportions of carbon, 3 of 
oxygene, and 6 of hydrogene ; or 57 carbon, 45 
oxygene, and 6 hydrogene. 
It will be unnecessary to speak of the applic- 
ations of woody fibre. The different uses of the 
woods, cotton, linen, the barks of trees, are suf- 
ficiently known. Woody fibre appears to be an 
indigestible substance. 
18. The acids found in the vegetable kingdom 
are numerous ; the true vegetable acids which 
exist ready formed in the juices or organs of plants, 
H 
