364 
Indian Foreat Records. 
[VOL. I. 
or an average of 37,160 trees for each period, exclusive of trees in plantations, 
which may for the present be left out of account. At the rate of growth in dry 
forests as ascertained by borings, the diameter increase of trees during a period 
of 30 years is as follows : — 
Second class trees 0'144x30 = 3'4 
Third class trees 0’162x30 = 4’9 
Fourth class trees 0'244x30 = 7‘3 
and therefore 
30 years, 
V. 
60 year 
s, 90 years, 120 years, 
150 years 
Ins. 
Ins. 
have a diameter of 
Ins. Ins. 
Ins. 
20-6 
24 
... 
» • • • • • 
17-2 
2U-6 
24 
12-3 
17-2 
20-6 
24 
5-0 
12-3 
17-6 
20-6 24 
1-0 
8-3 
16-6 
17-6 22-9 
26-3 
girth 
as the marketable 
size, the whole of the second class 
Trees with a pre- 
sent diameter of” 
trees and at least one-eighth of the third class trees will be fit to fell during 
the first two periods. In moist forest the diameter increase during 30 years is : — 
For first class trees . 
For second class trees 
For third class trees 
For fourth class trees 
0-155x30 = 4' 6" 
0-174x30 = 5' 2" 
0-255x30 = 7' 6" 
0-241x30 = 7' 2" 
And if 27 inches diameter (7 feet girth) be here taken as the minimum size for 
felling, a proportion of third class trees equal to that in dry forest will become 
available during the next 60 years. This gives a total number for the first two 
periods of — 
all first class trees 24,700 
all second class trees that will reach maturity . , 30,300 
one-eighth of similar trees in third class . . 6,700 
Total . 61,700 
Of these it is proposed to girdle during the first period — 
all first class trees 24,740 
all second class trees 5,260 
Total . 30,000 
or 1,000 per annum, leaving the balance of 31,700 for the second period. It 
is of course understood that it may not be convenient to remove all first class 
trees, as many may have to be left standing either on account of unsoundness or 
