46 
Indian Forest Records. 
[Vol. IV. 
The fractions of (e) are— 
155°—160° C. 
160°—165° C. 
165°—172° C. 
172°—180° C. 
180°—200° C. 
Above 200° C. 
Thu|S (a) has 87*5 per cent., ( b) has 79*0 per cent., (c) has 
80'0 per cent, and (d) has 65*0 per cent, passing below 172° C., while 
(e) has only 22 per cent. Out of these, another sample was pre¬ 
pared by mixing (a), (by (c) and (d) and fractionated with the fol¬ 
lowing results: — 
11-0 per cent. 
110 „ 
20-0 „ 
90 .A 
(a) + (b) + (c) + (d). 
155°—160° C. 
160°—165° C. 
165°—172° C. 
Residue above 172° C. 
43-0 per cent. 
27-5 „ 
15-0 „ 
14*5 „ 
(«) + ( b ) + (c) + (d) has thus about 86 per cent, passing below 
172° C., which, in the writer’s opinion, makes it a very good sample 
of turpentine oil. 
It may be remarked here that the heavy portions contained in 
13 instead of being eliminated must necessarily have mixed with 
the colophony, and the residual balance (e) must, therefore, be put 
back into the still with the fresh charge. As the quantity of (e) 
that mixes with the colophony in the still is very small, the 
quality of colophony is not in any way vitiated. But knowing the 
extremely heavy nature of the residue of the fraction D, it is pre¬ 
ferable to altogether eliminate it. Besides (a) + (b) + ( c ) + (d ) is 
slightly lower in the percentage of its low boiling fractions than Z; 
therefore, we may say that instead of putting back the heavy frac¬ 
tion of D or (e) into the still, it is better to redistil D and prepare 
the sample Z instead of (a) + (b) + (c) + (d). 
It was proposed to investigate the difference between Z and re¬ 
distilled A + B + C +13 and accordingly the whole of the crude oil 
was redistilled on exactly the same lines as crude resin. Thirty 
gallons of the crude oil were redistilled and 28 gallons were recovered. 
Twenty-eight gallons made 180 bottles of the size used in the factory, 
[ 46 ] 
