76 
Indian Forest Records. 
[Vol. VIII. 
In the Annual Incidence Chart the annual frequency is plotted in 
curves for two groups of trees, i.e., Trees 31-47 years old, in solid black 
line, on a total of 42 beeholes in the mean tree, and Trees 40-42 years 
old, in solid red line, on a total of 39 beeholes in the mean tree. There 
is sufficient consonance between the two incidence curves to show, that 
in this area at least, small groups of sample trees give a fairly accurate 
idea of the local abundance of the borer. 
The vertical distribution of the beeholes in the sample trees in this 
area is recorded on p. 98. (Vide Table 35 and Diagram 3.) 
3. Sample Plots in Pyinmana Division. 
I. Plantation No. 7 of 1901, Kaing Reserve. 
1. Description of Sample Plot. 
At the south-west corner of the plantation No. 7, Mohnit, in 
and near Burma Forest School Sample Plots Nos. 15 and 16, partly 
on the valley-floor of a small stream and partly on the terrace-slope 
alongside. The original area of the plantation w~as 52 acres, but 
within its limits, especially in the badly drained places, teak has 
disappeared or is of poor suppressed growth. On the slopes the 
growth and stocking is much better, but in the last few years the soil 
has been heavily eroded. 
Undergrowth .—On the valley-flat dense undergrowth of Kaing 
grass, Clerodendron sp., an acanthaceous shrub, a scandent Acacia, 
and other climbers with occasional trees of Iiydia calycina, Premna , sp., 
Albizzia stipulata, etc.; on the slope the undergrowth is replaced by 
tinwa ( C . pergracile) and miscellaneous tree species are absent. 
Past History .—Weeded 1902-1905 ; cleaned 1906-1908 ; thinne^ 
in part by the Burma Forest School in August 1915, and completed i n 
August 1916. Fire-protected continuously up to 1911 and from 191^ 
burnt departmentally each year. Fire protection was not successful 
in 1903, 1905 and 1911, when the plantation was accidentally burned. 
The first two fires were extensive, involving nearly the whole of Kaing 
Reserve. 
2. Results of Analyses. 
Humber of Trees Analysed —7. Date of Analysis— lst-3rd May, 1919. 
[ 304 ] 
