76 Indian Forest Records. [Vol. III. 
These figures of cost for Atlas must be treated in the same way as 
those worked out for Carbolineim and Jodelite , namely, with extreme 
caution, as only figures based on work carried out on a large scale can be 
relied upon. On the other hand they are instructive, for they show, as 
do the figures in the previous sets of experiments, that the cost of 
treating soft woods is excessive, while the cost of treating the harder 
woods, which come into the category of possible sleeper timbers is still 
within working limits. 
Past Records oe Timber treated with Atlas Solution. 
The solution has been used by Railway Companies in Australia and 
New Zealand as also in Brazil, and the Agents for Atlas in their pros¬ 
pectus record certificates sent to them by officials and private persons 
testifying to its value. 
The Indian records come chiefly from Managers of Assam Tea Estates, 
many of whom certify it as effective in keeping off white-ants. Mr. 
Copeland, Deputy Conservator of Forests, when in charge of the Kamrup 
Division, stated that he had used Atlas preservative and had absolute 
faith in it. He used a 25 per cent, solution. Further certificates are 
given by the Executive Engineers of Dacca, Chattisgarh State, 
Moradabad and the Resident Engineer, Bombay, Baroda and Central 
India Railway, all testifying to the efficiency of the preservative. 
The following are the results obtained up to date at the Forest 
Research Institute with the wood specimens treated with a 20 per cent. 
A 99 solution of Atlas and immersion for 24 hours, but which were 
not coated with coal-tar as is prescribed by the Agents of the “ Atlas ” 
solution. 
Treated. 
Untreated. 
Register 
No. 
Species. 
1 
Date on 
which 
laid down. 
Date 
of 
inspec¬ 
tion. 
Condition. 
Date on 
which 
laid down. 
Date of 
inspection. 
Condition. 
1 and 2 
Boswellia serrata . 
12tli June 
1909. 
17th Aug. 
1910. 
Showing 
signs of 
wet rot 
though 
not ac¬ 
tually 
unsound. 
12th June 
1909. 
25th Oct. 
1909. 
Completely destroy¬ 
ed by white-ants 
and removed on 
25th October 1909. 
3 and 4 
1 Pinus longifolia . 
Do. 
Do. 
Sound . 
Do. 
17th Aug. 
1910. 
White-ants working 
over the surface. 
( 14-9 ) 
