Indian Forest Records. 
rvoi, in. 
fife 
Creosote by the old method, by the Rtiping process, and with Cr4sol- 
Calcium salt, which they state works out as follows : — 
Taking for example a sleeper of 3 cubic feet, the cost of impreg¬ 
nation according to the old method, where 3 gallons of 
Creosote were used, comes to 9 d. per sleeper; in the case 
where 1 to % gallons are forced in according to the Rtiping 
process, the cost works out to 3*6^. and with Cr^sol-Calcium 
it comes to 1*4 d. per sleeper. 
Past Records of Timber with Cresol-Calcium. 
No experiments have been so far carried out in India with Cresol- 
Calcium. The substance is new on the market, so that no conclusive 
results are as yet available from Europe. The Indian Trade Journal of 
the 7th April 1910 states that “ the Swedish State Railways will already 
this year impregnate with Cr6sol-Calciuin half the quantity of their 
sleepers, annually treated.” They also say that experiments are to be 
made by the United States Forest Department with Cresol-Calcium. 
Summary. 
The employment of such a salt for Indian use remains to be 
proved and unless the boiling point of the tar-acids of which it is largely 
composed, (other than Phenol), is materially raised by their combination 
with milk of lime, good results cannot be expected. 
(12) CRESOYLE. 
Cresoyle 1 is another of the patent solutions which can be used by 
the Open Tank Method. It is also composed of the heavier oils of coal- 
tar, with a density of 1*05. It can be used in the same way as Creosote 
by pneumatic injection, or by immersion of the timber or as paint. 
It has been extensively used by the Royal Engineers, and Railway 
Administrations in Belgium, with satisfactory results. So far no records 
are to hand of experiments carried out with Cresoyle in India. 
1 Crdsoyle is obtained from Messrs. Gaston Mertens, Seneffe, Belgium. It costs 
50 centimes a Kilo or 2*27 annas per lb. = Rl-7-9 per gallon in Belgium. 
( 166 ) 
