Chemistry of Essential Oils

MYBTACE^E 361

It was found to contain about 10 per cent, of free geraniol and

rather over 60 per cent, of geranyl acetate. This oil should be of con-

siderable perfume value.

OIL OF EUCALYPTUS MACRORHYNCHA.

This tree is a red Stringy Bark of New South Wales. The oil has

the following characters :—

Specific gravity 0-929

Refractive index 1-4746 at 20°

Eucalyptol ......... 30 per cent.

Yield 0-27

It contains eucalyptol, phellandrene, pinene, eudesmol, and a ses-

quiterpene.

OIL OF EUCALYPTUS MACULATA.

This t*ee is a Spotted Gum of New South Wales and Queensland.

Its oil has the following characters:—

Specific gravity 0*896 to 0-920

Optical rotation + 5-2° „ + 8-2°

Refractive index 1-4861 at 16°

Yield 0 * 23 per cent.

OIL OF EUCALYPTUS MACULOSA.

This tree is also known as Spotted Gum. The oil has the following

values:—

Specific gravity(V 9158

Optical rotation....... +3*4°

Refractive index 1*4741 at 16°

Eucalyptol 50 per cent.

Yield 1-06

The oil contains eucalyptol, d-pinene, and aroma^endrene.

OIL OF EUCALYPTUS MARGINATA.
This tree is a Western Australian Jarrah tree. The oil contains
pinene, cymene, eucalyptol, aromadendral, and a sesquiterpene. It
has the following characters :—
Specific gravity 09117
Optical rotation - 85°
Refractive index 1-4946 at 16°
Yield 0*2 per cent.
L OF EUCALYPTUS MEGACARPA.

The oil of eucalyptus megacarpa
l
contains pinene, limonene,
dipentene, about 30 per cent, of eucalyptol, and up to 10 per cent, of
terpinene. The latter terpene was • identified in the fraction 170° to 190°,
by the formation of its nitrosite melting at 155°.

OIL OF EUCALYPTUS MICROCORYS.

This is the sallow wood of New South Wales or u turpentine tree"
of Queensland. It yields an oil having the following characters :—
1
H. G. Smith, J. Proc. Roy. Soc., N.S. Wales (1918), 52, 529.