OF THE ASH OF FOREST TREES. 
323 
8. Red Elm ( Ulmus fulva ). 
Tree sound. Average diameter four feet from the base, 20 inches. Average thickness of bark, | inch. 
Average thickness of each layer, O’0564 of an inch. Between 20 and 25 layers were taken for out¬ 
side wood, thickness 2f to 3 inches; the remaining layers were taken for inside wood. Growth quite 
uniform. 
Bark. 
Potash ... 
0 
11 
Soda - - - 
Chloride of sodium 
Chloride of potassium 
0 
•06 
Sulphuric acid 
5 
36 
Carbonic acid 
34 
41 
Lime 
44 
64 
Magnesia - 
3- 
09 
Phosphate of peroxide of 
iron, 
0 
•04 
Phosphate of lime 
l 6 
36 
Phosphate of magnesia 
i 
Organic matter 
2 
10 
Silica 
2 
81 
Coal 
5 8-98 S. 
9. Cork Elm (Ulmus racemosa) 
Potash 
Soda .... 
Chlorine 
Sulphuric acid 
Phosphate of peroxide of iron 
Phosphate of lime 
Phosphate of magnesia 
Carbonic acid ... 
Lime .... 
Magnesia ... 
Silica .... 
Soluble silica 
Organic matter 
Outside wood. 
Heart wood. 
Bark of twigs. 
Wood of twigs 
13-43 
7-34 
3-79 
5-82 
16-96 
7-89 
7-87 
19-74 
0-05 
0-0-5 
trace. 
0-20 
0-81 
4-57 
5-79 • 
8-94 
16-96 
26-89 
33-12 
12-69 
31-00 
34-79 
32-12 
17-72 
5-24 
2-20 
1-68 
4-80 
0-65 
1-35 
0-20 
0-40 
12-97 
11-28 
6-00 
25.80 
2-93 
2-18 
0-20 
1-93 
1-60 
10-84 
1-31 
0-55 
6-50 
0-40 
3-50 
104-24 S. 
100-69 S. 
100-57 
107-45 S. 
Wood. 
Bark. 
- 
25-93 
8-884 
1-70 
0-498 
0-30 
0-560 
2-57 
4-485 
j 13-77 
5-605 
17-70 
19-568 
22-83 
46-912 
8-20 
1-557 
3-57 
11-214 
1-67 
1-121 
not determined. 
98-24 S. 
99-807 S. 
The structure of this wood is singular and beautiful, and is probably readily distinguished 
from any other wood by a transverse section (See PI. viii. fig. 2). In this figure, the 
