Part I. j 
13 
Pearsox: Antiseptic treatment of Sleepers. 
A and B ; 2 per cent, in class C and 9 per cent, rejected, the latter 
chiefly due to original defects, as these sleepers were not passed before 
treatment. The more favourable results with this class of sleeper are no 
criterion as to the value of the treatment, and cannot be until the sleepers 
have been a further period of two or three years in the line, as ‘ Sain’ 
sleepers have been known to last up to 7 years in an untreated state. 
(4) Results op sleepers treated in Open Tanks with Chloride of 
Zinc and Green Oil or Avenarius Carbolineum. 
(For details of durability see Appendix III and for details of Treatment and Cost see 
Indian Forest Records, Vol. VI, Part IV, pp. 45 to 57.) 
The .sleepers were treated first with a 2 per cent, solution of Chloride 
of Zinc of which a Broad Gauge sleeper absorbed 14 to 16 lbs. and after 
drying out were treated with from 3| to 4i lbs. of a high grade Creosote 
Oil. These sleepers have now been from seven to seven and a half years 
in the line. The idea of treating sleepers with a soluble toxic salt, which , 
however, is liable to be leached out of the timber by excessive moisture 
and then to prevent this tendency by giving them a coating of creosote, 
is one of economy. The salt used is cheap and as only small quantities 
of creosote are used, the combined process is considerably less expensive 
than the full cell creosoting process and even cheaper than the Rupenis- 
ing sleepers. The value of this process will be discussed later under 
‘ Conclusions.’ 
{i) ‘ Chir ’ sleepers treated with Chloride oj Zinc and Green Oil. 
The ‘ Chir ’ sleepers were treated at Jagadhri and laid in the line near 
Muradnagar on the North Western Railway and have been down 7^ 
years. They are already beginning to fail due to splitting and rot, the 
former defect may in part be due to over heating during treatment and 
partly to having been a poor lot of sleepers when taken over for treatment. 
There is, however, no sign of white ant attack, on the other hand 13 per 
cent, have been rejected to date and 19 per cent, are in C Class. 
(m) ‘ Kail ’ sleepers treated with Chloride oj Zinc and Green Oil. 
The ‘ Kail ’ sleepers are laid in continuation of the above, and are 
doing well, being originally a better lot of sleepers than the ‘ Chir.’ 
Only 3 per cent, have been rejected, while 9 per cent, are in C Class. 
The spikes are holding well, the rail cut is insignificant and there are 
no signs of white ant attack. 
[*13 ] 
