4-M 



0-8892 ; the rotation (/„ = — i-2-3° ; and the rel'ractiAe index at 16° C, 

 1-4903. When a small quantity of the oil was placed in a shallow dish, as soon as 

 the more volatile constituents had e\-aporated, a semi-crystalline mass formed. 



Only a \-ery small amount of ester was present in the crude oil, as shown 

 by the following: — 1-8804 gram of oil, after boiling half an hour, required 0-0028 

 gram KOH, or a saponification number, 1-5. A second determination gave S.N., 

 I-4- 



A portion of the oil was acetylated in the usual way by boiling with acetic 

 anhydride and anhydrous sodium acetate, and the perfectly neutral oil saponified ; 

 2-50I grams required o-oii2 gram KOH, or a saponification number 4-5. As 

 1-5 was obtained with the unacetylated oil, the saponification number of the 

 esters formed from the small amount of alcohol present \\as only 3, this result 

 representing less than i per cent, of a free alcohol. It is perhaps partlv to the 

 presence of this small amount of an alcohol that the slight aromatic odour of the 

 crude oil is due. * 



When rechstilled, (170 c.c. of oil taken' nothing came over below 155° C; 

 between 155-160° C, 36 per cent., distilled; between 160-165°, 21 per cent., and 

 between 165-210°, 16 per cent. The thermometer then rapidly rose to 280°, 

 between that temperature and 300°, 4 per cent, distilled, thus 23 per cent, 

 remained in the still. The residue was poured into a vessel and set aside to 

 crystallise. After two days it had become a semi-solid crystalline mass, and was 

 then spread on porous plates to absorb the liquid portions. The comparatively 

 large amount of high boiling constituents considerabl\- retarded, towards the end, 

 the distillation of the lower boiling terpene, although the results generally of the 

 first three fractions agreed somewhat closely. These results were as follows : — 



Boiling Point. 



Per cent. 



'' H' c. 



"d I dcm. tube. 



Refractive Index 

 • at 22" C. 



155-160° C. 



36 



0-8527 



- 20-1' 



1-4738 



160-165' c. 



21 



0-8526 



- 19-3^ 



1-4741 



165-210'' C. 



iG 



0-8548 



- 15-1° 



1-4771 



280-300' c. 



4 



0-9336 



+ 3-6° 



1-5103 



The Pinene. 



The two first fractions were again distilled, when no less than 50 c.c. came 

 over within i degree of temperature (155-156° C), the third fraction was then 

 added to the residue in flask and the distillation continued, when ^2 c.c. were 

 again obtained boiling between 155-156°, and 18 c.c. between 156-159°; thus 

 over 48 per cent, of the total oil was obtained boiling at the temperature for pnre 



