356 THE CHEMISTEY OF ESSENTIAL OILS
OIL OF EUCALYPTUS DIVBBSICOLOE.
This tree is a Western Australian Karri. The oil has the following
characters:—
Specific gravity 09145
Optical rotation + 80'1°
Refractive index 1-4747 at 16°
Ester value 532
Yield 0-83 per cent.
It contains d-pinene, eucalyptol, and acetic esters.
OIL OF EUCALYPTUS DIVES.
This tree is found in Victoria and New South Wales, and is known
as the broad-leaved peppermint. It is the tree which was originally
known as Eucalyptus amygdalina, and its oil has the following char-
acters :—
Specific gravity 0-882 to 0-889
Optical rotation. •- 55° to - 70°
Refractive index 1-4894 at 16°
Its principal constituent is phellandrene, but it also contains piperitone.
OIL OF EUCALYPTUS DUMOSA.
This plant is one of the Mallees (dwarf eucalypts forming the
" scrub " of parts of Victoria, New South Wales, and South Australia).
The oil is of a good quality from a medicinal point of view, having the
following characters:—
Specific gravity 0900 to 0-916
Optical rotation. .• + 2° „ + 6°
Refractive index 14760 at 16°
Yield..1 per cent.
It contains pinene, eucalyptol, and aromadendral.
OIL OF EUCALYPTUS EUGENOIDES.
This tree is a white stringy bark of Victoria, Queensland, and New
South Wales. The oil has the following characters :—
Specific gravity.0-912 to 0'913
Optical rotation
Refractive index
Saponification value
Yield
The oil contains pinene and eucalyptol.
+ 3-4° „ + 4-7°
1-4747 at 16°
6-9
0-7 to 0'8 per cent.OIL OF EUCALYPTUS EXIMIA.
This tree is the white or yellow Bloodwood of New South Wales.
The oil has the following characters:—
Specific gravity 0-900
Optical rotation +27°
Refractive index 1-4889 at 16°
Yield 0-462 per cent.
It contains pinene and aromadendrene.
OIL OF EUCALYPTUS FASTIGATA.
This tree is the Cut tail of New South Wales. Its oil has the fol-
lowing values:—