Indian Forest Records. [Yol. VI 
( c) Cost of treating 300 Terminal]'a tomentosa broad gauge sleepers with 
Chloride of Zinc and Avenarius Carbolineum. 
Rs. A. P. 
Cost of felling, conversion, and extraction of 300 broad 
gauge sleepers. 602 0 0 
Cost of Chloride of Zinc to treat 300 broad gauge sleepers, 
absorbing 12 lbs. of a 2 per cent, solution, at 6 annas 
per lb. concentrated. . . . . . > 27 0 0 
Railway freight and cart-hire on the salt . . * 6 8 0 
Cost of Avenarius Carbolineum oil, to treat 300 broad 
gauge sleepers, absorbing 3 lbs. per sleeper . . 163 0 0 
Cost of railway freight and cart-hire on oil . . . 16 8 0 
Labour, for handling, treating and stacking sleepers . 50 0 0 
5 per cent, on cost of plant . . . . . . 17 8 0 
Fuel.! 13 8 0 
10 per cent., due to leakage and evaporation of oil, etc. . 16 0 0 
Total . 912 0 0 
The cost per sleeper works out to Es. 3-0-7. This is a high figure 
when compared with Pine sleepers treated in a similar way, but using 
Green oil instead of Avenarius Carbolineum. The reason is that the 
former oil costs 6 annas 10 pies, as against Es. 2-0-0 per gallon ; while 
the cost of extraction was Ee. 1-2-6 in the case of Pine sleepers, as against 
Es. 2 of Terminalia tomentosa sleepers. It remains to be seen whether 
the use of the more expensive oil is justified by results. Terminalia tomen¬ 
tosa may be classed as just below a first class sleeper in an untreated 
state; if, by treatment, its life can be extended to 12 years or more, it 
should fetch somewhere about Es. 4-8-0 to Es. 4-10-0 on the market. 
The question of treating it is therefore a commercial proposition, as it 
costs about Es. 3-0-0 to exploit and treat a broad gauge sleeper, which 
should leave a margin of profit for royalty and treatment in the neigh¬ 
bourhood of Ee. 1-8-0. 
(iv) Notes on the behaviour of sleepers treated with Chloride of 
Zinc and either Green oil or Avenarius Carbolineum, after 
HAVING BEEN LAID IN THE LINE. 
The sleepers have been about 3 years in the line, so no definite results 
are as yet available. Their condition on the last date of inspection is 
recorded as below 
[ 184 ] 
