82 
Indian Forest Records. 
[Yol. III. 
It is probable that the average cost of 8'85 annas for treating a 
B. G. sleeper is too high, and that the results obtained by the Public 
Works Department in the Punjab are nearer the mark. As before stated, 
such figures as are given above are deduced from the treatment of very 
small specimens of wood, and though the results are very fairly consistent 
throughout for all the solutions experimented with, the figures must be 
taken with considerable caution. By referring to the table on page 59 it 
will be seen that the cost of treating the various timbers with Avenanns 
Carbolinenm worked out to approximately the same figure as that for 
Solignum. The price of the former solution is 0T8 anna per oz. agauis 
0-28 anna per oz. for the latter, while the price of treatment of a B O. 
sleeper is approximately the same,_ which is accounted for by the greatei 
absorption of the cheaper antiseptic. 
Past Record with Solignum. 
Solignum 
Departments 
Departments 
has been tried by the Ordnance and Military Works 
and both the respective Directors-General of these two 
have pronounced it efficacious for the preservation of 
The Chief Engineer, Punjab Public Works Department, states that 
three roofs of a range of servants’ quarters collapsed and it was found that 
the poles which had supported the roof were riddled through and through 
by white-ants. Two years ago they were re-roofed with mud and reeds 
resting on “ Kail ” (Pinas exceha) battens. This type of roof is ex¬ 
tremely liable to be attacked by white-ants, but the reeds and battens 
soaked in Solignum have entirely escaped the ravages of the Teiunites. 
He further states that various preservatives have been used but none 
appear to be so economically convenient and effective in use as 
<<S °So%num has been tried at Pusa, and the Imperial Entomologist 
writes as follows :— 
<•' Solignum has given the best results of any white-ant preservative 
on wood that I have yet tested, and was effective m stopping 
the entrance of white-ants to a pucca building in which they 
were doing damage.” ^ 
«It is more effective than any arsenic preparation known to me. 
( 155 ) 
