SILVICAL DESCRIPTION OF LONGLEAF PINE. 39 
TasLe X VIII.—Height of longleaf pine at various periods. 
| 
Age. Height. | Age. | Height. Age. | Height. 
ee Feet i Gay ie Feet. Years. | Feet 
86 19 99 
20 17 110 89 200 100 
30 29 120 91 | 210 101 
40 41 130 93 | 220 101 
50 533 | 140 94 230 102 
60 62 150 95 | 240 103 
70 71 160 96 250 103 
80 Vion 170 97 
90 83 | 180 98 | | 
RELATION OF CLEAR LENGTH AND TOTAL HEIGHT TO DIAMETER BREASTHIGH. 
(See Table XIX.) 
Clear length and height both increase most rapidly before the trees 
are 10 inches in diameter. Height growth is uniformly greater than 
increase in clear length, but both continue at a uniform rate after the 
diameter reaches 10 inches, until it passes 20 inches, when both be- 
come exceedingly slow. 
TaBLE XIX.—Clear length and total height of longleaf pine. 
i | 
Diameter ‘Diameter Diameter 
breast- soe Height. || breast- nied Height breast- | A aed Height 
high. - : | high. pa high. clay 
———— |) — | ia ek eee ——_—___— ee a 
Inches Feet Feet. Inches Feet Feet. | Inches Feei. Feet 
ate aes 14 9 3 64 - |i 17 56 89 
2 15 23 10 41 69 | 18 57 91 
3 19 30 11 44 fo | 19 59 93 
4 23 36 12 46 la | 20 60 95 
5 26 42 13 49 80 21 61 96 
6 29 48 14 51 82 22 62 98 
| 382 53 15 53 85 23 62 99 
8 35 59 16 54 87 | 24 63 100 
PERIODIC DIAMETER AND VOLUME INCREMENT. 
(See Table XX. ) 
The rate of diameter and volume growth is here shown for different 
periods in the life of a longleaf pine tree, and also the average num- 
ber of years required for trees of different ages to grow 1 inch. The 
best periodic growth, both in diameter and volume, is made from 
the twentieth to the ninetieth years, the former culminating between 
the seventieth and eightieth years, and the latter between the eightieth 
and ninetieth years. In the case of the diameter growth for the total 
age of trees, it is seen that the best growth is between the eightieth 
and one hundredth years, while here the number of years required to 
grow 1 inch in diameter is much greater from the twentieth to the 
sixtieth years than for the same periods as shown under periodic 
diameter growth. This is due in the former case to the slow growth 
of longleaf pine during very early life, it taking, as shown in Table 
XIV, nineteen years to produce a tree 1 inch in diameter breasthigh. 
