Chemistry of Essential Oils

CONIFEBJE

tirely absent. The terpenes present appear to be laevo-limonene and
pinene. The oil has the following characters:—
Specific gravity 0
Rotation -
Refractive index
Esters (boiling)
(cold)

0'8826 at 22°

19-2°
1-4747 at 25°
30 *4 per cent.
29-8 „
Yield 0-0335 „
This tree has been introduced into India, and a trial distillate of the
leaves gathered in the Nilghiris yielded 0'04 per cent, of essential oil
having the following characters :—
Specific gravity.0-871 at 16°
Optical rotation.....- 27-6°
Refractive index.....1-4695 at 18°
Ester value. 51-1
Acid„. 1-2
Saponification value (after acetylation). 59-8
Free alcohols (as geraniol)..2-1 per cent-
Total ,,.17-3 „ „.
Esters as geranyl acetate ...17-85 „ „
CALLITRIS TASMANICA.
Pinene and limonene are the predominant terpenes in the leaf oil of
this species. Traces of a phenol are present, and about 60 per cent, of
geranyl acetate, which imparts a fine odour to the oil. Two samples
had the following characters:—

No.

1

2

Specific Gravity, ° C.

0-9036@ 22

0-8976 @ 15

Rotation, «D.

+ 1-0

- 5-8

Refractive Index, ° C.

1-4738® 25

1-4739 @ 15

Ester, per Cent, by Boiling.

59-95

62-75

Ester, per Cent, in Cold.

59-91

62-2

Yield, Per Cent.

0-14

0-208

CALLITKIS DBUMMONDII.
In the leaf oil dextro-pinene, dextro-limonene, and dipentene were
present. The fruit oil is practically identical with the leaf oil. They
have the following characters:—
OIL FROM THE LEAVES.

Locality and Dtte.

West Australia, 26/6/03

0-8591 ® 17

Rotation aD.

+ 42-2

1-4739 @ 19

Ester, per Cent.

1-85

Yield, per Cent.

0-547

OIL FEOM THE FRUITS.

Locality and Date.