u 
Indian Forest Records. 
[VoL. lA 
(m) ‘ In ’ sleepers treated with Chloride oj Zinc and Green Oil. 
The ‘ In ’ sleepers were laid in two localities, one near Pyinmana 
and the other north of Myingyan, on the Burma Railways. So far the 
results are not nearly so good as when ‘ In ’ is treated by other processes. 
They are, as noted elsewhere, deteriorating roimd the spike hole and 
under the rail seat. Dry rot is common and the sleepers are also devel- 
oping large longitudinal cracks. The rejections and C Class sleepers 
already amount to 64 per cent., while the sleepers have been only just 
over 7 years in the line. 
(iv) ‘ Kanyin ’ sleepers treated with Chloride of Zinc and Green Oil. 
The ‘ Kanyin ’ sleepers treated by this process are even worse than 
the ‘ In ’ sleepers and have nearly all failed in 7 years, as 72 per cent, 
have been rejected up to date and 11 per cent, are in C Class. The 
cause of deterioration is decay round the rail seat. 
{v) ‘ Sain ’ sleepers treated with Chloride oj Zinc and Avenarius 
Carholineum Oil. 
‘ Sain ’ sleepers were treated at Shahpur in Betul with a 2 per cent, 
solution of Chloride of Zinc, absorbing 12 lbs. of the solution, and after 
they had been allowed to dry out they were immersed in Avenarius 
Carholineum oil for a short period, during which they took up 3 lbs. of 
the oil. The sleepers have been in the line 7| years and have now 
nearly all been rejected which shows that this method of sleeper 
treatment is not suitable under Indian conditions. The chief 
cause of rejection is white ant attack, while when the sleepers were 
covered with ballast they were subject to dry rot. 
(5) Results of sleepers treated with Solignum and Burma Oil or 
Liquid Fuel. 
(For details of durability see Appendix IV and for details of treatment and cost see 
Indian Forest Records, Vol. VI, Part IV, pp. 57 to 68.) 
The Pine sleepers were treated in open tanks at Jagadhri with a 
mixture of 40 per cent, of Solignum and 60 per cent, of Earth Oil. At 
the request of the North Western Railway, the writer also treated 50 
Broad Gauge ‘ Deodar ’ sleepers in the same way. Nine pounds of 
this mixture was introduced on the average into each sleeper, though 
in some cases when treating highly seasoned ‘ Chir ’ this amount was 
considerably exceeded. The idea of mixing Earth Oil with the 
Solignum was to reduce the cost of treatment, which from the re-sults 
obtained to date seems to be justified. 
[ 14 ] 
