OF ASH IN FOREST TREES. 
315 
8. White Elm ( Ulmus arnericana). 
Sap wood. 
Heart wood. 
Outside bark of trunk. 
Inside ditto. 
Bark of limbs. 
Wood of limbs. 
Water 
34*65 
49*50 
19*00 
47*50 
42*60 
36*50 
Dry 
65*35 
50*50 
81*00 
52*50 
57*40 
63*50 
Ash 
0*80 
0*35 
8*25 
7*25 
7*50 
0*45 
The elm gave, on ignition in a close vessel, 15*84 per centum of charcoal, or matter fre£ 
from volatile elements : subtracting the inorganic matter, it leaves 15*04 per centum of 
pure charcoal. The outside bark of this elm consists of alternate layers of common lig¬ 
neous matter and cork, which, though thin, is fine and elastic. 
9. Chestnut (Castanea vesca ). 
Wood of the trank. 
Water - - • - ■ - * 42*35 
Dry -.- 57*65 
Ash ------ 0*48 
The percentage of charcoal in this wood amounts to 9*75 only : ash being deducted, it 
leaves 9*27. 
10. White Maple {Acer dasycarpum). 
Sap wood. 
Heart wood. 
Bark of the trunk. 
Bark of limbs. 
Wood of limbs. 
Water 
- 
- 
35*50 
37*50 
40*00 
41*45 
31*00 
Dry 
- 
- 
74*50 
62*50 
60*00 
58*45 
69*00 
Ash 
- 
- 
0*25 
0*20 
3*25 
2*75 
0*35 
11. Willow. Trunk ten inches in diameter. 
Water 
Dry 
Ash - 
- 
Sap wood. 
59*55 
40*65 
0*28 
Heart wood. Bark of the trunk. 
37*45 41*10 
62*55 58*90 
0*25 6*26 
12. Grape vine 
Water 
Dry 
Ash 
(Vitis labrusca ). 
- 
Wood. 
40*26 
59*74 
0*98 
13. Black Ash. 
Ash 
Seasoned wood. 
Sap wood. 
0-34 
Bark. 
8*19 
