64 
Indian Forest Records. 
[Vol. VIII 
pomiferns, Alstonia scholaris, Bisoxylum binectiferanum, Stephygyne 
paiviflora, Sterculia sp. and Anogeissus acuminata. Herb and grass 
growth is fairly abundant ; bamboos are, absent. 
Past History. —The forest was very little worked in Burmese times 
except locally for the requirements in teak of the villages of Mohnyin 
and Mogaung. Girdlings and clearings occurred along the line of the 
railway in 1891-92 and their effect on the area sampled has been men¬ 
tioned above. In 1899-1900 and again in 1904-05 teak girdlings were 
carried out in the forest nearby. 
Fire protection was in force and fairly successful during the period 
1895-1910 [W. P., Mohnyin Reserve, p. 4] and completely successful 
during the period 1900-1910 [W.P., p. 8]. Block V, which contains the 
areas sampled, has been protected up to 1914, while the surrounding 
forest was departmentally burnt annually from 1910. Since 1914 the 
area under consideration has probably been burnt each year. 
2. Results of Analyses. 
Number of trees Analysed=15. Bate of Analysis=lb\h.-2it\i May, 1919. 
Table 11. — Girth-beehole incidence in Natural Forest , Mohnyin 
Reserve, Katha, 1919. 
3 Inch 
Girth-Class. 
Serial 
Number 
of Sample 
Tree. 
Approxi¬ 
mate 
Age. 
Girth 
in Inches. 
Number 
of 
Beeholes. 
Arithmetic 
Mean of 
Girth-Class. 
; Arithmetic 
! mean 
Beeholes 
per 
Girth-Class 
16—18 | 
( 
32 
38 
23 
24 
16-0 
170 
10 
5 
| 16-5 
7-5 
36 
23 
19-0 
0 
19-21 ] 
34 
25 
19-5 
12 
!> 19-5 
5-0 
l 
35 
23 
20-0 
3 
J 
22—24 f 
33 
28 
24 
44 
22*5 
23-5 
18 
6 
j 230 
12-0 
r 
39 
29 
25-0 
17 
25—27«< 
40 
28 
26-0 
12 
k 26-0 
18-0 
L 
26 
42 
27-0 
25 
j 
28—30 £ 
27 
20 
26 
37 
30-0 
30-0 
35 
34 
j 300 
34-5 
31—33 
29 
54 
33-5 
24 
33*5 
240 
37—39 
37 
58 
370 
45 
37-0 
45-0 
It is probable that the figures given for the ages are in most cases 
underestimated, but the sample trees can be arranged in two fairly well- 
defined groups of 5 each, in order to arrive at the index of attack. Sam¬ 
ple trees Nos. 38, 34, 35, 33 and 27 have a mean girth of 2T0 inches, and 
a mean age of 24*4 years, and an arithmetic mean number of beeholes 
of 13-6. On the girth-beehole graph plotted from the data in Table 11, 
the beehole value for a 21-0 inch tree is 9-6. This figure is taken as the 
[ m ] 
