120 
Indian Forest Records . 
[Vol. VI 
objectionable smell of the creosote is, in such cases, generally of little or no 
•consequence. The cost of treatment will depend on the depth of impreg¬ 
nation desired and the choice of antiseptic. Creosote and Petroleum oils, 
mixed in equal quantities, cost about 9pies per lb.; creosote alone, which 
ias to e imported from Europe, costs about 14 pies per lb. landed at 
elhi or any other town in Northern India. Solignum costs Rs. 15 to 
s. 18 per 5-gallon drum, according to colour; Jodelite costs Rs. 2-11-0 
per gallon ; Atlas ‘ A ’ solution concentrated Rs. 16 in 5-gallon drums ; 
Treett oi , ! i m P ( ^ r 7 ted fr° m England, comes to about 13 annas per gallon at 
Delhi; while Chloride of Zinc costs Rs. 20 per cwt. in Calcutta. The above 
aie pre '’" ar rates - From the above it will be seen that the patent solu- 
10 ns such as Solynum and Jodelite are expensive, but their nature allows 
them to be used for internal purposes in dwelling houses, which is not 
the case with the cheaper creosote oils of commerce. The salts are very 
cheap and may be considered fair preservatives, but as the timber after 
endurnc 6 !! & ^ re T u * res be painted, the total cost is considerably 
The above considerations have been based on the assumption that 
it has been decided to treat the timber by the Open Tank process bu* 
if the amount of timber is insufficient to justify the erection of an Open 
Tank m which to treat it, the only alternative is to treat the timber by 
app ying one or more coatings of the preservative in a hot state with 
a. brush. 
No mention has been made above of Powellized timber, as to erect a 
Powell plant to treat small quantities of timber only is probably out of 
e ques ion. n the other hand, Powellized timber is very suitable for 
•use m dwelling houses, as the treatment in no way adversely alters the 
appearance of the timber; moreover, such timber gives off no offensive 
odour and permits of being painted after treatment. 
( n ) Treatment of Posts, Fencing poles, Telegraph poles and 
MINING PROPS. 
It is a well known fact that posts and poles of all descriptions, un¬ 
less of the most durable timber, are especially liable to decay. The de- 
Ca ^ 1S j m ° S j ra P lc ^ * n cases where the timber is placed in contact with the 
ground and m eases where sap-wood is present. Fencing and telegraph 
posts show the first signs of decay just above and below ground ; in fact, 
un ess a post is in an advanced stage of decay, the damage is generally 
confined to a 3 feet zone partly above and partly below ground. The 
bottoms of posts are often found to be quite sound, while the middle 
portion may have nearly disappeared. This is due to want of light 
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