12 
Indian Forest Records. 
[VoL. IX 
{ii) ‘ Kail ’ sleepers treated with Avenarius Carholmeum oil. 
Finns excelsa ‘ Kail ’ sleepers were laid in continuation of the above 
mentioned ‘ Chir.’ These sleepers are still doing well after 7-| years service, 
there is no sign of white ant attack or of rot having set in, though the 
oil absorbed only amounted to 4 lbs. The difference in the condition 
of the ‘ Chir ’ and ‘ Kail ’ is much more marked in this experiment than 
it was in the case of the Powellized sleepers, where ‘ Kail ’ had only a 
slight advantage over the ‘ Chir.’ 
(Hi) ‘ In ’ sleepers treated iviih Avenarius Carholineum oil 
Dipterocarpus tuherculatus, ‘ In sleepers were laid in three different 
localities in the Burma Railways, one being in the plains near Pyinmana, 
the other two on the hdl section between Mandalay and Maymyo. 
They are Metre Gauge sleepers and absorbed only !•! lbs. per sleeper, 
which might be presumed would be insufficient to protect the timber, 
and as a matter of fact probably is so, though the sleepers are still doing 
fairly well, after being in the line for seven and a half years. A warning 
note is sounded in the report on these sleepers as to deterioration 
setting in round the spike hole, which it will be remembered has been 
recorded in the case of the Powellized ‘ In ’ sleepers laid in the Eastern 
Bengal State Railway and which may be the ultimate cause of failure. 
From results obtained in all experiments with ‘ In ’ timber there can be 
little doubt that boring and adzing before treatment and the use of 
bearing plates will considerably increase the life of this type of 
sleeper. 
{iv) ‘ Kanyin ’ sleepers treated with Avenarius Carholineum oil. 
The ‘ Kanyin ’ sleepers treated with Avenarius Carholineum oil, are 
fast deteriorating after being seven and a half years in the line, as 45 
per cent, have already been rejected. The cause of rejection is decay 
round the spike hole and under the rail seat, but as those laid outside 
Maymyo are reported in some cases to be mere shells it is certain that 
owing to insufficient penetration of the antiseptic, white ants have been 
able to penetrate beyond the impregnated layer, and so destroy the 
sleepers. 
(v) ‘ Sain ’ sleepers treated with Avenarius Carholineum oil. 
These sleepers are laid in three localities on the Rohilkund and 
Kumaon Railway and are still doing well after being in the line seven 
and a half years. As many as 89 per cent, of the sleepers are in classes 
[ 12 ] 
