MYETACE^ 363
Specific gravity 0-907
Optical rotation + 14-5°
Kefractive index 1-4900 at 16°
Yield 0*5 per cent.OIL OF EUCALYPTUS OBLIQUA.This tree is a " Stringy Bark " of the western part of Australia, but
is found in the Eastern Colonies as well. Its oil contains phellan-
drene, aromadendral, and traces of eucalyptol, and has the following
characters :—
Specific gravity 0*883 to 0-890
Optical rotation - 24-2° „ - 28-8°
Refractive index 1-4934 at 16°
Yield 0*66 to 0'77 per cent.OIL OF EUCALYPTUS OCCIDENTAL^.This oil has the following characters :—
Specific gravity 0*9135
Optical rotation +9°
Refractive index 1-4774 at 16°
Yield 0-95 per cent.
It contains about 35 per cent, of eucalyptol, pinene, aromadendral,
and a sesquiterpene.OIL OF EUCALYPTUS ODOBATA.This is a South Australian Box tree, whose oil has the following
characters:—
Specific gravity.
Optical rotation
Refractive index
Eucalyptol
Yield.0-899 to 0-922- 1-1° „ + 2-3°
1-4639 at 20°
up to 86 per cent.
1*87 „
It contains eucalyptol, cuminic aldehyde, pinene, and phellandrene.
OIL OF EUCALYPTUS OLEOSA.This tree forms one of the Mallee scrub group, which are all fairly
rich in cineol. It is well known in Victoria and South Australia and
is also found in the interior extra-tropical parts of Western Australia.
The leaves yield about 1*3 per cent, of an oil, having the following
characters:—
Specific gravity 0-925
Optical rotation - 5° to + 5°
Refractive index 1-4746 at 16°
Yield 1-0 to 1-3 per cent.
It is very rich in eucalyptol, and contains pinene, aromadendral, and
a sesquiterpene.
According to Baron Miiller, it is the best-known solvent for fossil
resins, and " is unique for many technological applications ". This oil
is not identical with much of the so-called Oleosa oil of commerce, which
is in reality obtained from Eucalyptus cneorifolia.