lo8 



The crude oil from E. dextropinea, from Barber's Creek, gave the 

 following results : — 



On rectification 2 per cent, came over below 156° C. 

 Continuing the distillation : — ■ 



62 per cent, distilled between 156-162° C. = first fraction. 

 25 ., ,, 1 62-1 72 ° C. = second fraction. 



Specific gravity, first fraction, at 15 C. = 0-8691. 

 ,, second fraction ,, = 0-8759. 



crude oil ,, = 0-8778. 



Optical rotation, first fraction ,, a D + 34 - 4°- 



second fraction ,, fl D + 32-46°. 



It is thus apparent that the two samples might be considered as 

 identical oils, only varying to the extent usually found with those of the same 

 species of Eucalyptus at the same time of the year. Further investigation was, 

 therefore, continued on the oil from the Barber's Creek sample alone. On 

 redistilling the portion boiling between 156° and 162° C. the following results 

 were obtained : — 



28 per cent, distilled between 156-157° C. = first fraction. 

 30 ,, ,, 157-158° C. = second fraction. 



23 ,, ,, 158-160° C. = third fraction. 



Specific gravity, first fraction, at 15° C. = 0-8654. 

 ,, second fraction ,, = 0-8666. 



third fraction ,, = 0-8682 



Optical rotation, first fraction ,, a D + 34-98° 



second fraction ,, a D + 34-73° 



third fraction ,, a n + 33-88 



The third and final rectification, taking the portion distilling between 

 156-158° C, gave 50 per cent, boiling between 156 and 157° C. This fraction 

 gave the following results : — 



Specific gravity at |° C. = 0-8750. 

 ||° C. = 0-8629. 

 By taking the specific gravity obtained at 18° C, the specific rotation was 

 [«]„ + 41-2°. The refractive index at 20° C. for a specially prepared sample was 

 1-4661. 



A sample of commercial dextro-rotatory oil of turpentine, rectified in 

 the same apparatus, under exactly similar conditions, and using the same 

 corrections, gave 35 per cent, distilling between 156 and 157° C. This fraction 

 had specific gravity at 20° C. = 0-8624, an d a specific rotation [a] D + 13-8°. 



Tha Lsevc-rotatory Pinene. — The crude oil of E. Icevopinea, from 

 Rylstone, N.S.W., distilled a few days after collection, gave the following 

 results : — 



On rectification 2 per cent, came over below 157° C, this portion 

 contained the usual amount of acid water and some volatile 

 aldehydes. 

 Continuing the distillation : — 



60 per cent, distilled between 157-164° C. = first fraction. 

 28 ,, ,, 164-172° C. — second fraction. 



Specific gravity, first fraction, at 15° C. = 0-8701. 

 second fraction ,, = 0-8747. 



crude oil ,, = 0-8754. 



Optical rotation, first fraction ,, a D — 40-67°. 



second fraction ,, ci D — 38-75°. 



