ASPEN IN THE CENTRAL ROCKY* MOUNTAIN REGION 
45 
Table 26. — Stem taper of aspen as shown by diameter inside of bark, «te. — Con. 
TREES 70 FEET IN HEIGHT 
Diameter breast high 
Height from the ground 
Stump 
10 feet 
20 feet 
30 feet 
40 feet 
50 feet 
60 feet 
Inches 
4.2 
5.1 
6.0 
6.9 
7.7 
8.5 
9.3 
10.2 
11.1 
11.9 
12.7 
13.6 
14.4 
15.3 
16.2 
17.1 
18.0 
19.0 
20.0 
Inches 
3.8 
4.6 
5.5 
6.4 
7.1 
7.9 
8.6 
9.4 
10.1 
10.9 
11.7 
12.4 
13.2 
14.0 
14.9 
15.7 
16.6 
17.5 
18.5 
Inches 
3.4 
4.2 
5.0 
5.6 
6.4 
7.2 
7.8 
8.5 
9.1 
9.8 
10.6 
11.2 
11.9 
12.6 
13.4 
14.2 
14.9 
15.6 
16.5 
Inches 
3.0 
3.6 
4.2 
4.9 
5.5 
6.2 
6.8 
7.4 
8.0 
8.6 
9.2 
9.8 
10.4 
11.1 
11.8 
12.5 
13.1 
13.9 
14.6 
Inches 
2.3 
2.9 
3.4 
4.0 
4.6 
5.1 
5.6 
6.2 
6.7 
7.3 
7.9 
8.4 
8.9 
9.5 
10.0 
10.6 
11.2 
11.6 
12.2 
Inches 
1.8 
2.3 
2.7 
3.2 
3.6 
4.0 
4.5 
4.9 
5.3 
5.8 
6.2 
6.6 
7.1 
7.5 
7.9 
8.4 
8.8 
9.2 
9.7 
Inches 
1. 1 
1.4 
1. 7 
2.0 
2.3 
2.6 
2.9 
3.2 
3.5 
3.8 
4.0 
4.3 
4.6 
4.9 
5.2 
5.6 
5.8 
6.1 
22 inches 
6.4 
TREES 80 FEET IN HEIGHT 
Diameter breast high 
Height from ground 
Stump 
10 feet 
30 feet 
40 feet 
50 feet 
60 feet 
Inches 
Inches 
Inches 
Inches 
3.4 
3.0 
2.6 
2.2 
4.0 
3.6 
3.2 
2.6 
4.8 
4.3 
3.7 
3.0 
5.4 
4.9 
4.2 
3.5 
6.1 
5.5 
4.8 
4.0 
6.8 
6.1 
5.3 
4.4 
7.5 
6.7 
5.9 
4.9 
8.2 
7.4 
6.5 
5.4 
8.9 
8.0 
7.0 
5.8 
9.6 
8.6 
7.6 
6.3 
10.2 
9.2 
8.1 
6.7 
11.0 
9.9 
8.7 
7.2 
11.6 
10.6 
9.3 
7.7 
12.4 
11.2 
9.8 
8.1 
13.0 
11.7 
10.3 
8.5 
13.7 
12.5 
10.9 
9.0 
14.4 
13.1 
11.5 
9.5 
15.0 
13.7 
12.0 
10.0 
15.6 
14.2 
12.5 
10.4 
70 feet 
4 inches-. 
5 inches. 
6 inches. 
7 inches. 
8 inches. 
9 inches . 
10 inches 
llinches 
12inches 
13L nches 
14inches 
15inchex 
16 inches 
17i nches 
18i nches 
19 inches 
20i nches 
21 inches 
22 inches 
Inches 
4.2 
5.0 
5.9 
6.8 
7.6 
8.5 
9.3 
10.2 
11.0 
11.9 
12.7 
13.7 
14.6 
15.4 
16.2 
17.0 
17.8 
18.7 
19.5 
Inches 
4.0 
4.8 
5.6 
6.4 
7.1 
8.0 
8.8 
9.6 
10.3 
11.2 
11.9 
12.8 
13.6 
14.5 
15.2 
16.0 
16.8 
17.6 
18.3 
Inches 
3.6 
4.4 
5.2 
6.0 
6.7 
7.4 
8.2 
10.4 
11.2 
11.9 
12.7 
13.5 
14.2 
14.9 
15.6 
16.4 
17.1 
Inches 
1.6 
2.0 
2.3 
2.6 
3.0 
3.3 
3.6 
4.0 
4.3 
4.6 
4.9 
5.2 
5.6 
5.9 
6.2 
6.6 
6.9 
7.2 
7.5 
The following figures and formulae may also prove of value in 
preparing special volume tables from the data just given. The 
form factor of aspen is as follows : 
Height 
Form 
factor 
40 
50 
60 
70 
80 
0.43 
.43 
.44 
.46 
.52 
The area of the base, multiplied by height, multiplied by form 
factor gives the total volume in cubic feet. 
To convert solid cubic feet to stacked cubic feet, multiply by 0.7. 
