92 
Indian Forest Records. 
[Vol. VIII. 
For the trees in the 1873 plantation, viz.. Nos. 9, 62, and 170, the 
arithmetic mean girth is 34 inches, and the arithmetic mean number 
of beeholes is 51. (Leete’s girth for a mean tree of 45 year-old is 47 
inches, which from graph readings should have a total of 72 beeholes). 
For the sample trees of the 1868 and 1869 plantations the mean girth 
is 2 inches and the mean number of beeholes is 34-5. The normal girth 
of a typical 49 year-old tree is nearly 48 inches ; this tree should have 
total of 45 beeholes. For the purposes of the Annual Incidence Graph 
the arithmetic mean number of beeholes of the dateable trees (i.e., 
excluding 170) has been taken, and-this value, 49*2 beeholes has been 
used in the reduction of the actuals. 
It will be observed that the attack, in the case of all four dateable 
trees, commenced relatively late, i.e., after 23 to 33 years in the 1873 
plantations, and after 17 years in the 1868 and 1869 plantations, and 
that a particularly heavy attack occurs in 1915 and 1916 on one tree, 
S. T. 9, which is not represented in the other trees. The number of 
sample trees taken is too small to permit generalisations, but it is evident 
from the difference between the behaviour of the insect in this area and 
*its behaviour in the younger plantations, that further analyses in this 
locality will be very instructive. 
The vertical distribution of beeholes in these trees is shown in 
Table 35, p. 98. 
S. Sample Plot in South Toungoo. 
1 . Plantation No. 1 of 1905, Bondaung Reserve. 
1. Description of the Sample Plot. 
An area 0-47 acres containing 243 trees selected as an observation 
area in March 1916, situated on a south-west slope about 300 feet above 
m. s. 1.; soil a sandy loam somewhat eroded. Quality of the growth 
rather below the average. 
Undergrowth sparse, mainly a few coppice shoots of Terminalia 
chebula ; for practical purposes the undergrowth is negligible. 
Past History. Cleaned 1910, 1911, 1913, and 1915; thinned 
December 1917 with neighbouring plantations. Fire-protected up to 
and including 1915 ; burned April 1st, 1916, in 1917 and in 1918. 
2. Enumerations and Analyses. 
1916. The plot was surveyed and all trees examined by the divisional 
staff up to a height of 20 feet in March 1916 ; of the 243 trees 48 or 
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