Part II.] Pearson: Antiseptic Treatment of Timber. 101 
Process. 
Species. 
Total 
cost of 
treating 
per B. G. 
sleeper. 
Remarks. 
Creosoting 
Pinus longifolia 
« a. p. 
2 2 0 
Actual cost of treatment 
Old method 
(taking creosote in 
India at 7 annas per 
gallon) — contd. 
Ditto 
Ditto 
0 14 8 
at Aligarh in 1870. 
Actual cost of treatment 
Ruping process, 
(1) Hard woods 
0 4 2 
on the Light Railway, 
N.-W. P., in 1874. 
1 The figures are arrived 
WITH CREOSOTE. 
(2) Moderately hard 
0 7 8 
| at by taking the ab- 
[ sorption as half that 
j in the case of the old 
| method of creosoting. 
'j Prices charged by the 
Haskin PROCESS 
] woods. 
(3) Soft woods 
Hard woods 
0 12 3 
0 13 2 
! 
Ditto 
Soft woods 
Moderately hard wood 
0 8 2 
0 2 0 
f Company in England 
j for treating timber. 
Exclusive of royally. 
. 
Boucherie process 
Beech and Pine woods 
0 4 4 
The figure is taken from 
an estimate put up by 
Dr. Gibson in 1898 for 
working under Indian 
conditions. 
The figures apply to 
or copper-sulphate 
impregnation. 
Burnett’s process or 
Hard woods 
0 2 0 
European conditions 
and are taken from an 
estimate put up by Dr. 
Warth in 1878. 
impregnation with 
chloride of zinc. 
Moderately hard woods 
0 2 8 
Estimates based on the 
present price of chlo¬ 
Soft woods 
0 3 5 
ride of zinc in 
j Calcutta. 
Ditto 
Beech 
0 2 2 
\ Figures based on cost 
Oak 
1 
0 2 10 
! of treatment in Eng- 
f land, quoted by Dr. 
J Warth. 
( 174 ) 
