Pari IV.] Caccia ; Selection method of treatment in India. 
373 
the size classes are as follows hi the East Yoma Working Circle, without adding 
on ten years : — 
Years. 
feet girth ........ 21 
3 feet girth ......... 50 
4^ feet girth ........ 83 
6 feet girth ......... 120 
7 feet girth ......... 146 
The rotation of 160 years will be divided into five periods of 32 years oacli, 
each of which will be divided into six sub-periods, four of five years each au^ 
two of six years each. The whole area will be worked over in each period, and 
the working plan must be revised at the end of the first period. 
In paragraph 44 the number of sound teak standing in the forest is given 
as follows : — 
Trees. 
Class I, above 7 feet girth 31,523 
Class II, 6 to 7 feet girth ...... 18,114 
Class III, 41 to 6 feet girth ..... 42,768 
Class TV, 3 to 41 feet girth ..... 101,737 
Class V, 14 to 3 feet girth ..... 150,910 
It may be assumed that these trees will survive to 
lowing proportions : — 
be girdled in the fol- 
Per cent. 
95 
85 
70 
50 
25 
Class I .... 
Class II .... 
Class III .... 
Class IV .... 
Class V .... 
Giving the following numbers : — 
Class I ... 
Class II ... 
Class III ... 
Class IV ... 
Class V ... 
The first period lasts for 32 years, 
available for girdling : — 
The whole of Class I 
The whole of Class II 
.r, of Class III 
Trees. 
29,947 
15, .397 
29,938 
50,869 
37,728 
During it the following trees will be 
Trees. 
29,947 
15, .397 
4,865 
Total . .50,199 
because during the 32 years all the trees in Class II will pass from the lowest 
dimensions of Class TI to the lowest dimensions of Class I, as they require only 
26 years to do so {vide paragraph above). 
To pass from Class III to Class II 37 years is required so, ^ cf Class III 
will grow through Class II into Class I, as the whole of Class II will have 
passed into Class I in 26 years. 
