Chemistry of Essential Oils

476 THE CHEMISTEY OF ESSENTIAL OILS

The essential oils have the following values :

MARACAIBO OIL.

Specific gravity .......

Optical rotation.

Refractive index.

Specific gravity

Optical rotation

Refractive index

MARANHAM OIL.

0-898 to 0-906

• 4° „ - 13°
  1-4955 „ 1-4980

0-896 to 0-905

• 4° „ - 22°
  1-4958 „ 1-4980

Specific gravity

Optical rotation

Refractive index

Specific gravity

Optical rotation

Refractive index

PARA OIL.

BAHIA OIL.

0-886 to 0-910

— 4° — 33°

1-4930 " 1-5020

0-885 to 0-910

• 8° „ - 28°
  1-4940 „ 1-4980

CARTAGENA OIL.

Specific gravity.

Optical rotation.

Refractive index.

Specific gravity

Optical rotation

Refractive index

Specific gravity

Optical rotation

Refractive index

MATURIN OIL.

SURINAM OIL.

ANGOSTURA OIL.

Specific gravity.

Optical rotation.

Refractive index.

0-894 to 0-910

— 4° — 23°

1-4938 „ 1-4980

0'899 to 0-904

• 0° 48' „ - 10° 10'
  1-4970 „ 1-5008

0-903 to 0-910

— 7° — 12°

1-4978 „ 1-5015

0-905 to 0-916

• 2° „ - 10°
  1-4990 „ 1-5020.

The following figures are of value, since they are the results of the
'examination of forty-one samples, many of which were imported direct
by* the firm examining them,^1 and of whose authenticity there is no
doubt:—

Essential

p. Gr..

Yield.

Oil

0

• 44 p.

of Bahia Copaiba—

1

0-898

11°

cent.

2 3

0'899 0'900

- 11° 26' - 10° 32'

60 p. cent. 46 p. cent.

4

0*900

- 10° 30'

54 p. cent.

5

0-902

- 8° 30'

56 p. cent.

6

0-902

- 8°0'

54 p. cent.

1

Evans, Analytical Notes (1910), 26.