358 
Indian Forest Records. 
[VoL. I. 
It will thus bo seen that as far as those individual trees are concerned 
which reach such dimensions there is a gradual increase in the annual increment 
up to a girth of 6 feet and even often above that girth. On the other hand a 
large proportion of the trees never attain this girth. To determine the exact 
size at which the chir can be most profitably exploited is not therefore an easy 
problem. It lies somewhere between 5 and 6 feet. Ring-countings on 212 
stumps including the 53 stumps counted hy Mr. Fernandez {vide page 14 of 
his plan) give the following results : — 
Average number of rings per inch of radius — 
1 
2nd. '3rd. 
1th. 
5th. 
6th. ; 7th. 
1 
8th. 1 9th. , 10th. 
1 
nth. 
12th. 
13th. 
11th. 
15th. 
16th. 
17th. 
9 9 
1 
10 
11 
12 i 15 
16 j 18 i 20 
20 
21 
21 
25 
29 
29 
31 
By increasing the number by 10, to allow for the time it takes the seedling 
to reach a height of 4 feet 6 inches, at which height the standing trees are 
usually measured and allowing from 0'3 to 0'6 inches for the thickness of the 
bark, according to the size of the tree, we arrive at the following ; — 
Diameter 6 inches at breast height, age 33 year.s lowest IV Clas”. 
12 
ditto 
ditto 
65 
>? 
III „ 
17 
ditto 
ditto 
105 
4' — 6" girth. 
>1 
18 
ditto 
ditto 
112 
>9 
lowest II Class, 
»} 
19 
ditto 
ditto 
125 
if 
5' — 0" girth. 
20 
ditto 
ditto 
135 
u 
o'— 3" ,. 
24 
ditto 
ditto 
169 
>> 
lowest I Class. 
30 
ditto 
ditto 
242 
99 
Therefore it takes : — 
33 years for the seedling to enter the IV Class. 
32 ditto lowest IV Cliss tree to enter the III Class. 
47 ditto „ III ditto II „ 
57 ditto „ II ditto I „ 
Taking the percentages of trees passing from one class to the other 
as determined by my re-enumerations — 
43 per cent, of II Class trees become I Class within the average time. 
56 do. Ill ditto II ditto ditto. 
25 do. Ill ditto I ditto ditto. 
The present proportion of the different classes being fairly normal and being 
in the proportion for every i,uOu trees as 
I. II. III. 
1 
4 
.11 
