DISTILLATION OF STUMPWOOD. 63 
dicating that the pinene present is laevo-alpha-pinene. Subsequent 
fractions showed dextro-rotations, in a continually advancing degree. 
The extra high density of the first distillate to come over is to be 
attributed to the presence of traces of water, held in solution by 
small quantities of methyl alcohol, known to occur in this portion of 
refined turpentine recovered from crude second turpentine, and also 
partly to the presence of the alpha-pinene. As the distillation pro- 
7O GO 90 44800 10 
PEFRACTIVE (INDEX AT 20°C. 
GO 
49680 90 44760 10 20 370 40 
le ae 
a 
Balciaizin: 
Boots be des 
JO 20 GO 40 SO 09 70 G9 I0 00 
FER CLNT DOLSTILLED 
Fig. 7.—Refractive index of distillate. 
gresses the specific gravity of the distillate slowly rises with the boil- 
_ Ing point to where, at about 20 per cent of total distillate, the presence 
of a body having a specific gravity lower than that of the distillate 
immediately preceding it again asserts itself by a bending back- 
ward of the specific-gravity curve at this point. This may be due to 
the presence of one or more of several bodies, the most probable 
of which is limonene or dipentene (specific gravity 0.845, refractive 
