350 THE CHEMISTRY OF ESSENTIAL OILS
The oil contains eucalyptol, piperitone, esters, and some free alcohols,
as well as the phenol tasmanol.
The following analyses are of the first-hour distillates, which are
being put on the market for medicinal purposes :—Specific Gravity
at 15° C.0-9188
0-9188
0-9190
0-9190
0-9200
0-9193
0-9186
0-9186
0-9195
0-9198
0-9191
0-9193
0-9199
0-9202
0-9211
0-9179
0-9195
0-9196
Rotation
<*D.+ 1-7°
+ 0-3°
-0*0°
+ 1-3°
+ 1-5°
+ 0-9
°
+0-5°
-0-5°
+ 0-4°
+ 0-3°
+ 1-3°
+ 1-5°
+ 0-1°
-1-2°
+ 1-4°
+ 1-6°
+ 1-4°
+ 1-2°Solubility in
70 per cent.
Alcohol.Vols.
1-1
1-1
1-1
1-1
1-05
1-1
1-05
1-1
1-1
1-1
1-1
1-15
1-1
1-15
1-1
1-15
1-1
1-1Refractive
Index
at 20° C.1-4614
1-4621
1-4622
1-4633
1-4627
1-4628
1-4624
1-4620
1-4622
1-4617
1-4633
1-4631
1-4622
1-4636
1-4628
1-4632
1-4631
1-4625
Cineol.Over 70 per cent.
>f ))
75 per cent, phosphoric acid method.
Over 70 per cent.
84 per cent, resorcinol method.
Over 70 per cent.
69- 5 per cent, phosphoric acid me-
f VinrlDX1OQ.
Over>> 70 per cent.
73 per cent, phosphoric acid method.
Over 70 per cent.
»» »
71 percent, phosphoric acid method.
74 ,?
Over 70 per cent.
81 per cent, resorcinol method. 77
per cent, by phosphoric acid me-
thod.The second-hour's distillate and the third-hour's distillate are quite
similar to each other. They contain about 30 per cent, of eucalyptol,
together with the less desirable constituents of the oil.OIL OF EUCALYPTUS B^UERLENI.This tree is the brown gum of New South Wales, Its oil has the
following characters:—Specific gravity 0-8895
Optical rotation + 4-55°
Refractive index 1-4841 at 16°
Saponification value 10
Yield 0*33 per cent.It contains pinene, eucalyptol, eudesmol, and aromadendrene.OIL OF EUCALYPTUS BAILEYANA.
This is one of the numerous trees known locally as " stringy bark,"
and is confined chiefly to the north of New South Wales and the ad-
jacent southern portion of Queensland. The leaves yield about 1 per
xsent. of oil, of a melissa-like odour, which, however, is partially covered
by the cineol present. Its specific gravity is variable, usually about
0*940. It appears to contain up to 25 or 30 per cent, of cineol, some
mitral, and phellandrene.