INCENSE CEDAR. 
23 
suppression the seedling stage is followed by a period of more or 
less rapid height growth. 
Incense cedar, under ordinary conditions, makes its fastest height 
growth between the ages of 40 and 150 years, growing most rapidly 
between the fiftieth and seventy-fifth years. When the maximum has 
once been reached, however, height growth falls off rapidly until at 
about 100 years the periodic or current annual growth falls below 
the mean annual growth. Beyond 150 years, growth in height is 
merely nominal. While height growth varies in amount in different 
localities, the above statements held true in every case studied, except 
one on the Plumas National Forest. Here, while the rate of height 
growth at no time equaled the maximum in other localities, the period 
of height growth was prolonged considerably, continuing at a fair 
rate up to 300 years of age. 
Table 13. — Height growth of incense cedar. 
[curved.] 
Locality. 
Average 
of all 
above the 
mean. 
Average 
of all 
below the 
mean. 
Mean. 
Age. 
Eldorado. 
Plumas. 
Stanis- 
laus. 
Total 
height. 
Basis 
number 
of meas- 
urements. 
T. 24 N., T. 24 N., 
R. 5 E. R. 10 E. 
Total height (feet). 
Feet.i 
23 
49 
65 
75 
82 
86 
90 
93 
96 
Years. 
60 
52 
67 
78 
86 
92 
97 
100 
104 
106 
109 
112 
114 
116 
118 
120 
58 
73 
84 
92 
98 
102 
105 
108 
111 
113.5 
116 
118 
119.5 
121 
122.5 
124 
125.5 
127 
12 
29 
43 
53 
60 
67 
71 
76 
79 
82 
85 
88 
89.5 
91 
92.5 
94 
95.5 
97 
| 
80 
> 46 
4b 
100 
52 
63 
74 
83 
90 
96 
101 
106 
109.5 
113 
116 
119 
121 
123 
125 
126 
61 
70 
77 
82 
86 
89 
91 
93 
95 
96.5 
98 
99 
100 
101 
102 
103 
120 
1 
140 
95 
100 
104 
108 
112 
116 
119 
122 
124 
127 
129 
160 
\ 177 
180 
200 
220 
240 
98 
260 
101 \\ 196 
280 
103 
300 
105 J 
320 
106 'l 
340 
108 ! 
360 
109 > 96 
380 
110 
400 
111 J 
Basis number of 
measurements 
60 
90 
319 
34 
2 515 
1 Figures rounded off to the nearest foot. 
2 The difference between this figure and the total number of measurements indicated for the different 
localities is due to the inclusion of additional measurements, more or less scattered, from other localities 
in deriving the mean. 
DIAMETEK GKOWTH. 
Rapid diameter growth is confined largely to early life, although 
under favorable circumstances it continues for a considerably longer 
period than rapid height growth. Under ordinary conditions it 
