20 
Indian Forest Records. 
[Vol. IV, 
the directions of Mr. Smythies shows distinct improvement, about 
78 per cent, passing below 167° C. The latter is nearly equal 
to the original Z. 
It may be remarked here that though the writer of 
this Note had recommended the manufacture of extra fine 
oil by redistilling the crude oil to the extent of 80 per 
cent, and rejecting 20 per cent, of the total output of the crude 
oil, effect to this recommendation was not given, and so the com¬ 
plaint about the greasy residue left by the oil on evaporation w r as 
again received from the purchasers. The oil Z, of course, was 
naturally not so good as the sample sent by the North-Western 
Railway, but when Mr. Smythies improved it, as mentioned above, 
the total annual output of oil of this quality was readily purchased 
bv Messrs. Turner, Morrison & Co., of Calcutta, although the Chief 
Store-keeper, North-Western Railwav, was not prepared to take it. 
It seems Mr. Smythies had no more trouble in disposing of Z to the 
Calcutta firm. 
In reply to Mr. Smythies’ letter to the Institute mentioned 
above, the crude oil sent by him was rectified by the writer, elimi¬ 
nating 20 per cent, of the heavy turps, which alone caused the 
greasy residue in the oil on evaporation. The sample of this 
refined oil was sent to the Chief Store-keeper, North-Western 
Railway, Lahore, through Mr. Smythies. He approved its quality 
as suitable for the Railway Workshops. 
It follows, therefore, that there w^ould have been no more 
trouble in disposing of turpentine oil if 20 per cent, of the heavy 
turps occurring in the crude distillate had been eliminated, as 
originally proposed. But the loss of oil thus caused is somewhat 
serious, especially when the turpentine residue left by redistillation 
had to be thrown aw T ay as unsaleable. Even under the partial re¬ 
distillation that was. being done in the distillery, a considerable 
amount of useless residue, of a very heavy nature was gradually ac¬ 
cumulating at the factory stores. 
(ii) The Utilization of Turpentine Residue in the Manufacture of 
Printing Ink. 
On seeing the nature of the residue, it occurred to the writer 
that it could be very well utilized in the manufacture of printing 
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