ESSENTIAL OIL OF ERIOSTEMON CROWEI. 229 
The physical characters of the last mentioned fractions 
are deemed worthy of publication as showing the difficulty 
in separating the phenol ether by fractional distillation in 
a condition of purity from the optically active bodies 
accompanying it:— 
Below 65°Cs ays c 129-181°O),, 18119290, 132=140eO. 
Specific gravity +3° C. he 1:034 -1024 1:1242 iel24s8 
Optical rotation +27°8° —0-55° -1° —0°15° +40°4° 
Refractive index 20°C. 1°4719 1:5182 1:°5301 1:5318 1:5316 
Determination of the Terpene.—The portion boiling 
below 65° O. at 10 mm. when mixed with a third of its 
volume of l-a-pinene [«], -50°18° readily gave a nitro- 
-sochloride, which on purification melted with decomposition 
at 109°C. It appears, therefore, to be d-«-pinene. 
Leevorotatory constituent.—Repeated efforts to identify 
this body met with no success, particularly as only small 
quantities of the containing fractions were available. 
Determination of the Phenol Ether.—Very little diffi- 
culty was experienced in separating by repeated fractional 
distillation at 10 mm, this constituent in a state of purity 
and in high yield from the first lot of oil distilled; on the 
other hand the return of pure material was very low from 
the second lot on account of the difficulty of freeing the 
ether from the accompanying levo-rotatory and dextro- 
rotatory bodies, particularly as the latter was found to be 
a sesquiterpene with a closely related boiling point. 
As thus obtained it is a pale tinted highly refracting 
liquid resembling safrol in general appearance, but with a 
slightly modified and less powerful odour. The two pre- 
parations possessed the following characters, viz:— 
No. P. No. 2. 
Boiling point at 10 mm. 130-—131°C. 130—132°0O. 
Ditto, ditto at 766 mm. a 256 — 258° CO. (u.c.) 
Specific gravity 13° O. 1°1339 1°1298 
Optical rotation inactive inactive 
Refractive index 20° C. 1°5330 1°5328 
