62 
Indian Forest Records . 
[VOL. HI 
Relative Cost. 
Assuming that this antiseptic can be relied upon to protect the 
timber from decay for a reasonable period of time, the economic position 
of affairs resolves itself into the question as to whether the cost of the 
quantity of the solution, just sufficient to preserve it, taken up by a 
B. G. sleeper, is within the price we can afford to pay for such work. 
To solve this problem we must know what we can afford to pay for 
treating a sleeper. Taking, for example, the timber here experimented 
upon, namely “ In ” wood, the cost of extraction and conversion may 
be.put at R2-0-0, the royalty may be put at 4 annas per cubic foot 
or 13 annas 2-5 pies per B. G. sleeper, a total of R2-13-25 pies. The 
total price of a treated sleeper must be below that of a first class 
untreated sleeper, for instance “ Sal,” the price of which may be put 
at R4-2-0. We have therefore a margin of from SI-0-0 to ill-5-0, 
of which at least two-thirds may go to treatment. 
From the percentage of absorption given in the above table and 
taking the price of Avenarius Garbolineum as 0T5 anna per oz., and a 
B. G. sleeper as 3*3 cubic feet or 24-4 superficial feet, the following 
would be the cost of treating the sleepers, according to the period of 
immersion and quantity of oil absorbed : 
Serial 
No. 
Species. 
Cost of 
process¬ 
ing. 
• 
Cost of oil 
absorbed by 
a B. G. 
sleeper per 
superficial i 
area in 
sq. ft. 
Cost of oil 
absorbed by 
aB. G. 
sleeper per 
cub. ft. 
Total cost of 1 
treating a j 
B. G. 
sleeper j 
based on the j 
superficial 1 
absorption. 
Total cost of 
treating a 
B. G. sleeper 
based on the 
assumption 
of complete 
impregnation. 
anna. 
annas. 
annas. 
annas. 
annas. 
1 
1 
2-89 
7-18 
3-89 
8-18 
2 
f '<> rrt 
O 
1 
1-39 
3-40 
2*39 
4-40 
3 
O 
1 
8-05 
19-80 
9-05 
20-80 
4 
£ 
t—1 
1 
1610 
39-52 
17T0 
40-52 
5 
erocarpus 
(B urman “ 
1 
13-50 
32-94 
14-50 
33-94 
6 
1 
1709 
41*65 
18'09 
42-65 
7 
1 
27-23 
66-82 
28-23 
67-82 
( 135 ) 
