10 Indian Forest Records. [Yol. VI 
“ (5) Details of tlie gum-oleo-resin collected from tlie trees in 
Experiment B are given below :— 
Net quantity 
OP GUM COLLECTED. 
a 
a 
total 
tree, 
Girth of 
trees. 
Serial 
No. of 
trees. 
December 
1916. 
January 
1917. 
February 
1917. 
March 
1917. 
April 
1917. 
i May 
1917. 
zs 
Total collectio 
oz. 
Average i 
collected per 
in oz. 
Remarks. 
r24* to 30" . 
1 to 15 
oz. 
14- 0 
1 oz. 
| 14-8 
oz. 1 
24-0 1 
oz. 
22-4 
• oz. 
23-2 
cz. 
40-4 , 
oz. 
2-8 
oz. 
141-6 
oz. 
9-4 
Bruised at 
Do. . 
16 to 30 
3 3-6 
30-0 
50-4 | 
67-6 
46-4 
41-2 
5*6 
274-8 
18-3 
each fresh¬ 
ing. 
Not bruised. 
30' to 36' . 
1 to 15 
17-2 
16-0 
20-0 
4 
38-8 
22-8 
20-0 
4-0 
138-8 
9-25 
Bruised. 
Do/ . 
16 to 30 
38-4 
64-0 
63-2 
57-6 
69-6 
536 
15-2 
361-6 
24-1 
Not bruised. 
Above 36'. 
1 to 15 
43-6 
58-8 
40-0 
50-0 
44-4 
67-6 
5-6 
310-0 
20-7 
Bruise d. 
Do. 
16 to 30 
129-6 
138-0 
171-2 ' 
. 1 
209-6 
140-4 
169-2 
21-6 
979-6 
65-3 
Not bruised. 
Total in oz. 
276-4 
321-6 
368-8 
446-0 
346-8 
392-0 
54-8 
2206-4 
Avrg7 
24-5 
“ (6) It will be observed that the bruised trees (Nos. 1—15 in each 
girth-class) yield much less drip than the unbruised trees 
(Nos. 16 —30), and that the larger the girth the greater 
the yield. Again, it will be noticed that continued tap¬ 
ping increases the flow which reaches its maximum 
somewhere about the 20th time of freshing. This does 
not agree with the results obtained in Gwalior, where 
it is said that after the 4th “ freshing ” the yield remains 
practically constant. 
(t From the table it will also be seen that the average total yield 
of an unbruised tree over 36 inches in girth was 65*3 oz. 
or per collection 1*5 oz. 
“ (7) From both Experiments A and B, it will be seen that 
collections in June are very poor. This may be due to 
physiological reasons due to the change of season but it 
is also, to a certain extent, due to the mechanical washing 
away by rain of the gum-oleo-resin which had exuded. 
In any case, the rainy season is not suitable for collection 
of the drip as it is then difficult to move about in the 
forests; and forest labour is not available, as high wages 
are paid to agricultural labourers at that season. 
“ (8) It has been noticed that thick-barked trees yield more gum- 
oleo-resin than thin-barked trees and that there is a marked 
exudation from cracks which occur in the bark of the 
[ ai2 ] 
