Chemistry of Essential Oils

366 THE GHEMISTEY OF ESSENTIAL OILS

0*9281

+ 5*2°

1*4736 at 16°

0-825

OIL OF EUCALYPTUS POLYANTHBMA.

This oil has the following characters:—

Specific gravity0*9281

Optical rotation+5*2°

Refractive index1*4736at

Yield

It contains pinene and eucalyptol.

OIL OF EUCALYPTUS POLYBBACTEA.
This is one of the Mallee eucalyptus trees found in New South
Wales. Its oil has the following characters :—
Specific gravity 0*9143 to 0-930
Optical rotation 0" „ - 2°
Refractive index 1-4592 to 1-4736 at 16°
Yield .... .... 1-35 per cent.
It contains up to 90 per cent, or over of eucalyptol, with small
-amounts of pinene and aromadendral.

OIL OF EUCALYPTUS POPULIFOLIA.

This oil has the following characters:—

Specific gravity

Optical rotation

Refractive index

Eucalyptol.

Yield.

0*920 to 0'923

+ 0-41° „ +1-2°

1-4709 at 16°

about 60 per cent.

0'66 to 0*86 per cent.

It contains eucalyptol, pinene, and a sesquiterpene.

OIL OF EUCALYPTUS PROPINQUA.

This oil has the following characters :—

Specific gravi ty

Optical rotation

Refractive index

Yield.

0-899

i- 4-5°

1-4788 at 16°

0-235 per cent.

It contains eucalyptol, pinene, and aromadendral.

OIL OF EUCALYPTUS PULVERULENTA.

This oil has the following characters :—

Specific gravity 0*92

Optical rotation ....

Refractive index 1-46

Yield

It contains eucalyptol and pinene.

0*9236

+ 2-1°

1-4686 at 16°

2-2 per cent.

OIL OF EUCALYPTUS PUNCTATA.

This tree is found in Queensland and Victoria,

has the following characters :—

Its essential oil

Specific gravity

Optical rotation

Refractive index

Eucalyptol.

Yield.

0-913 to 0*9297

• 23° to + 4
  °
  14774 at 16°
  46 to 65 per cent.
  0-63 „ 1-19 per cent.
  It contains eucalyptol, aromadendral, and cuminic aldehyde.