Part IV.] Caccia : Selection method of treatment in India. 383 
From a study of previous enumeration surveys carried out in 
pine forests, it has been found possible to draw up a table laying 
down temporarily what should be the constitution of the various 
diameter classes in a normal selection forest. The following table 
shows the conclusions arrived at in the case of the Eein des Boules 
working circle : — - 
Diameter breasthigh. 
Number of trees j 
per hectare. 
Volume of each | 
tree. 
Volume per 
hectare. 
Centimetera. 
Cab. meter, j 
Cub. meter. 
15 
. 
12G 
0-1 
12-6 
20 
90 
0-3 
27-0 
25 
GO 
0-5 
30-0 
30 
43 
0-7 
30-1 
35 
30 
1-1 
33-0 
40 
22 
1-5 
330 
45 
17 
20 
34-0 
50 
13 
2-5 
32-5 
55 
9 
3-1 • 
27-9 
GO 
7 
3-7 
25-9 
65 
5-5 
4-4 
24-2 
70 
4 
5-2 
20-8 
75 
a 
G-0 
18-0 
80 
2 
G-9 
13-8 
85 
1-5 
7-8 
11-7 
90 
1 
8-8 
8-8 
95 
i 0*5 
9-9 
4-9 
Totals 
I 434-5 
... 
388-2 
Accepting this as a fairly correct representation of the normal 
forest, it follows that during the period of the felling rotation which 
has been fixed at 10 years, the number of trees removed must be 
replaced by an eqiial number of trees, which will have passed up 
from the lower diameter classes. If the higher diameter classes are 
too fully stocked, the surplus stock must be gradually removed ; 
H 
