34 
BULLETIN 544, U. S. DEPARTMENT OF AGRICULTURE. 
Table 9. — Diameter growth of spruce in Maine, by types. 
[Based on the last 20 years.] 
[CURVED.] 
Diameter breast 
high. 
Lower spruce ] Upper spruce 
and hardwood I and hardwood 
land, 564 trees. : land, 379 trees. 
Inches. 
Average. 
Peri- 
■ odic 
! annual 
growth, 
j Time 
re- 
1 quired 
to grow 
Peri- 
odic 
annual 
Time 
re- 
quired 
to grow 
grow ~ -X tog™ 
inch. S r ^ in - i inch 
Lower spruce 
slope, 144 trees. 
Peri- 
odic 
annual 
Time 
re- 
al $!^ lW ax 
t~T)Der *Druce i Average of all 
! types, 1,174 
slope, 87 trees. 
trees. 
Peri- 
odic 
mnual 
Inches. 
0.036 
.048 
.063 
.080 
.098 
.114 
.126 
.136 
.142 
.146 
.148 
.150 
.148 
.146 
.142 
.138 
Years. 
28 
21 
16 
13 
10 
9 
8 
7 
Inches. 
0.054 
.063 
.071 
.078 
.085 
.091 
.096 
.102 
.109 
.112 
.112 
.109 
.106 
.106 
.106 
.106 
Years. 
19 
16 
14 
13 
12 
11 
10 
10 
: T ™ Q Peri- 
SB 
Inches. 
0.015 
.022 
.032 
.046 
.067 
.093 
.113 
.124 
.127 
.126 
.122 
.116 
.110 
.103 
.096 
.091 
141 
112 
Years. 
67 
45 
31 
22 
15 
11 
9 
8 
8 
Inches. 
0.026 
.030 
.034 
.038 
.041 
.044 
.047 
.049 
.052 
.055 
.058 
.060 
.062 
.0C2 
.062 
.0C0 
Years. 
38 
33 
29 
26 
24 
23 
21 
20 
19 
18 
17 
17 
16 
16 
16 
17 
Inches. 
0.034 
.045 
.056 
.0C8 
.081 
.093 
.105 
.115 
.122 
.126 
.129 
.130 
.129 
.126 
.122 
.116 
Time 
re- 
quired 
togrow 
linch. 
Years. 
29 
22 
18 
15 
12 
11 
10 
9 
8 
8 
8 
8 
119 
1 From data secured by R. S. Hosmer, 1902, on partially culled land in Squaw Mountain Township, 
Me., and including trees of all crown classes. 
Table 10. — Diameter growth of spruce in New York. 1 
[All types, spruce-hardwood type chiefly; dominant trees only.) [curved.] 
Diameter 
breast 
high. 
Absolute maxi- 
mum. 
Average maximum. Average. 
Periodic 
annual 
growth. 
Time 
required 
to grow 
linch. 
Periodic J^red 
.annual r t e q £^T 
growth. \°g™ 
Basis. 
Inches. 
21 
2 
Inches. 
0.176 
.218 
Years. 
5.7 
4.6 
4.0 
3.5 
3.2 
3.1 
3.0 
3.0 
3.2 
3.4 
3.7 
4.1 
4.6 
5.3 
6.4 
7.6 
9.1 
Inches. 
0.111 
.140 
.164 
.186 
.205 
.217 
.223 
.223 
.219 
.210 
.197 
.184 
.168 
.150 
.128 
.110 
.093 
Years. 
9.0 
7.1 
Inches. 
0.046 
Years. 
21.7 
Trees. 
.061 
16.4 
13.3 
11.2 
9.9 
9.1 
8.7 
8.5 
8.3 
8.1 
8.1 
8.1 
8.4 
8.9 
9.9 
11.2 
13.2 
15.6 
19.6 
3 
. 253 
6. 1 i - 075 
4 - 2S2 
5.4 
4.9 
4.6 
4.5 
4.5 
4.6 
4.8 
5.1 
5.4 
6.0 
6.7 
7.8 
9.1 
10.8 
.089 
.101 
.110 
.115 
.US 
.121 
.124 
.124 
.123 
.119 
.112 
.101 
.089 
.076 
.064 
.051 
5 
!:::::::: 
10 
11 
12 
13....... 
14 
15 
16 
17 
18 
.309 
.324 
.331 
.328 
.317 
.297 
.270 
.245 
.216 
.187 
.156 
.132 
.110 
10 
42 
32 
57 
46 
65 
44 
27 
19 
25 
15 
4 
4 
2 
1 
19 
20 
393 
! From data collected by the Conservation Commission of New York in 1912 on culled land in Essex i 
Herkimer Counties. 
2 The time required to grow to a diameter of 1 inch at breastheight was 11 years for " absolute max- 
imum" growth conditions, 17 years for "average maximum," and 36 years for "average." 
