m 
Indian Forest Records. 
[Vol. III. 
Process. 
Species. 
Total 
cost of 
treating 
per B. G. 
sleeper. 
R a. p. 
Cresol-Calcium 
Not known, probably 
pine woods. 
0 1 6 
Kyanizing process 
! 
(1) Hard woods . i 
0 4 7 
or impregnation with 
chloride of mercury. 
J 
(2) Moderately hard 
woods. 
0 8 2 
(3) Soft woods 
0 12 11 
Ditto 
For 41 woods by using 
a 0‘66 per cent, solu¬ 
0 3 C 
tion of *alt. 
Powellizing process 
Any timber 
1 0 t 
impregnation with a 
saccharine solution. 
Ditto 
Karri timber . 
0 11 
Ayenarius Oabboli- 
Finns excels a (Kail). 
0 7 ' 
neum Oil. 
Pterocarpus macro- 
ccirpus (Burman 
Padauk), 
Dipterocarpus tuber - 
culatus (“ In ” 
wood)— 
0 5 
(i) after 1 hour’s im¬ 
mersion. 
0 3 
Remarks. 
The figure is based on 
data given by the pro¬ 
moters for treating an 
English sleeper and 
worked out for a corre¬ 
sponding B. G. sleeper. 
This price does not in¬ 
clude freight to India 
of the salt, and royalty 
charges. 
1 
j These figures are worked 
i out on the present 
f price of corrosive sub¬ 
limate in Calcutta. 
j 
The figure is taken from 
Dr. Warth’s report of 
1878. It is probably 
too low for Indian con¬ 
ditions. 
The present rates charged 
! by the Powell Co. in 
Bombay are 5 annas per 
j cubic foot. 
i The figure is based on the 
cost of treating Earn 
sleeper in Australia, 
| exclusive of royalty. 
1 
Results of laboratory 
experiments, calcula¬ 
ted on Indian prices. 
y They are probably 
somewhat high and 
would be reduced if 
work was done on a 
large scale. 
J 
* NoTE> _-VYerG the work to be carried out on an extensive scale, 
think that the cost of treatment could be considerably reduced. 
( 175 ) 
the Powellizing Co* 
