75 
Part II.] Pearson : Antiseptic Treatment of Timber. 
per cent, of water, so that the price works out to O’038 per oz. for the 
diluted solution. The volume of a B. Gr. sleeper is taken as 3'3 cubic 
feet and its superficial area 24*4 square feet. 
Species. 
Cost of 
processing. 
Cost of solution 
absorbed by a 
B. G. sleeper 
per superficial 
area in sq. ft. 
1 
Cost of 
solution ab¬ 
sorbed per 
B. G. sleeper 
per cub. ft. 
Total cost of 
treating a B. G. 
sleeper based 
on superficial 
absorption. 
Total cost of 
treating a 
B. G. sleeper 
based on the 
assumption 
of complete 
impregnation. 
anna. 
1 
annas. 
annas. 
annas. 
annas. 
Boswellia serrata 
1 
335 
63-8 
34-5 
64-8 
P inns longifolia . 
1 
15*9 
45*1 
16-9 
46-1 
Pinus excelsa 
i i 
19-4 
55*2 
20-4 
56-2 
Picea Morinda 
i 
7*8 
! 13-6 
8-8 
14-8 
A hies Pindrow . 
i 
7*5 
18-8 
8-5 
19-8 
Pterocarpus mac¬ 
i 
30 
4-8 
4-0 
5-8 
rocarpus. 
Bombax mala - 
i 
144 
25-0 
15-4 
26-0 
baricum. 
Bauhinia retusa . 
i 
11*4 
18*3 
124 
19-3 
Dipterocarpus 
tuberculatus. 
i 
3-6 
6*3 
4*6 
7-3 
Anogeissus latifolia 
i 
4*2 
10*4 
5-2 
11-4 
Shorea robusta 
i 
4*2 
73 
5*2 
8-3 
Average 
i 
11-35 
24*43 
12-35 
25*43 
As before stated the firm advocate a 10 per cent, solution instead of 
20 per cent, as used in the above experiments, which would halve the 
cost of treatment. 
( 148 ) 
