384 Indian Forest Records, [VoL. I, 
whilst if the stocking is below the normal, the possibility must be 
proportionately reduced. 
Suppose the size of the exploitable tree be taken as one with a 
diameter of 45 centimeters, it will be necessary to calculate by com- 
paring the enumerations of 1885 with those of 1905 the number of 
trees with a girth below 45 centimeters, which may be expected to 
reach exploitable dimensions during the next 10 years. This may 
be worked out as follows : — 
Pines. Beech. 
In 1905, tlie stocu consisted of 2,984 trees 45 cent, in 
girth 2,382 
602 
During the pre- 'J Between 1886 and 
vious 20 .years, ( 1896 . . 373 
the fellings f Bet ween 1897 and 
ditto 
327 
46 
have yielded J 1905 . . 505 
ditto 
394 
111 
Total . 3,862 
3,103 
759 
In 1885, the stock consisted of 2,684 
ditto 
2,480 
. 204 
Therefore number of trees which "N 
have passed into the diameter class f 
0'45 and over between 1885 and 1 ’ 
ditto 
623 
555 
1895 J 
Or annually . . • . • 58 
ditto 
31 
27 
These 31 pine trees and 27 beech trees have been obtained yearly, 
from the 40 centimeter diameter class, and the average number of 
trees which stood in this class during the period of 20 years may be 
estimated as follows : — 
In 1885, there existed 771 trees, 429 pines — 342 beech trees. 
In 1896, „ 1,004 „ 392 „ — 612 
429 ^ 11 + 392 X 9 ■) 
} =412. 
20 
342 X 11 -t- 612 X 9 
Average number of beech trees, O' 40m. inj 
diameter (. 20 
That is, 412 pines of the 40 centimeter diameter class have yield- 
ed, yearly, 31 pine trees of exploitable dimension or 7’5 per cent. ; 
and 463 beech trees of the 40 centimeter diameter class have 
given, annually, 27 beech trees of exploitable size, or 5'8 per cent. 
Therefore average number of pine trees, 0'40m. 
in diameter 
