Part IV.] R. S. Pearson: Antiseptic Treatment of Timber . 77 
These sleepers were supplied by the Cresol-Calcium Impregnating Aktie- 
bolag Company and laid by the North-Western Railway from mile 
315/12 to 315/18, between Sangi and Pans Akil stations on the Sukkur 
Section* 
The latest report submitted by the Executive Engineer, Sukkur,. 
dated 24th October 1915, on the condition of these sleepers, states that 
one has been rejected, due to attack by white-ants, and puts 120 into 
A class, 250 into B class and 123 into C class. The reason for classi¬ 
fying 373 sleepers in classes B and C is due to the ends having cracked 
and split and is not due to white-ant attacks. The cut under the 
bearing plates is reported as not severe, while the spikes are holding 
well. The report states that some of the C class sleepers are now hardly 
serviceable for the main line where trains run at a high speed. 
The point of interest about this experiment is that the sleepers, 
with the exception of one, have not been touched by white-ants, in a 
section of the line which is notorious for these pests. These sleepers 
are laid in continuation of the Powellized sleepers , the records of which 
are given in the previous chapter, which have also so far withstood the 
ravages of white-ants. It may be stated here that untreated Jarrah, 
and also in some cases untreated Deodar, have suffered heavily from 
white-ant attacks in this section of the North-Western Railway. 
3. Sleepers treated with Jodelite and laid in the Burma 
Railways. 
In Chapter III are recorded the results of experiments carried out in 
Burma with a few Powellized species ; at the same time as these sleepers 
were laid down, a similar set of sleepers treated with Jodelite were placed 
alongside them. Exactly how the sleepers were treated with Jodelite 
is not recorded, but it is thought that the solution was applied with a 
brush, giving the timber one or more coats of the oil. These experi¬ 
ments are of interest having been in progress longer than any others in 
British India. The results of an inspection carried out on the 3rd June 
1916 by A. Rodger, Esq., Forest Research Officer, Burma, and the 
Assistant Engineer, Yamethin, are as follows :— 
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UNIVERSITY OF ILLINOIS LIBRARY 
MAY 2 9 1922 
