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.