Chemistry of Essential Oils

432 THE CHEMISTEY OF ESSENTIAL OILS

These limits, however, are from time to time found to be too narrow,
some Bigarade oils being slightly laevo-rotatory, and, occasionally, the
ester value being lower than 30. But most oils fall within the above
limits.
The following tables, compiled by M. Jean Gras of Cannes, show
the characters of oils distilled during two seasons :—

1901 NEROLI OILS.

Distilled on

May 23.

Ju

, 24.

25.

26.

, 27.

28.

, 29.

, 30. i.

, 31.

ne 1.

„ 2.

» 3.

„ 4.

Specific

Gravity

at 15°.

0-875

0-874

0-875

0-875

0 875

0-875

0-874

0-874

0-875

0-874

0-873

0-875

0-876

Optical

Rotation

at 22°.

+ 5° 2'

+ 4° 28'

+ 5° 25'

+ 5° 10'

+ 5° 45'

+ 5° 46'

+ 6° 15'

+ 4° 55'

+ 5°

+ 6

J

+ 4° 40'

+ 7°

+ 6° 46'

Saponifica-

tion No.

39

40

41

37

34

37

31

33

34

32

36

39

34

Solubility in 75 per

Cent. Alcohol

at 24°.

in two volumes

t t

>

I

Yield of Oil

per 1000 kilos.

0-900

0-870

0-980

1-020

1-150

1-160

1-200

1-120

1-150

1-020

1-210

1-400

1-500

Distilled

on

May 11

.. 12

,, 13

',', 15

,, 16

„ 17

„ 18

» 19

„ 20

„ 21

„ 22

„ 23

„ 24

„ 25

„ 26

„ 27

„ 28

„ 29

„ 30

„ 31

June 2

Total

Quantity

Cent.

per

eld

0-65

0-80

0-89

0-81

0-83

0-78

0-87

0-77

0-77

0-77

0-87

0-90

1-00

1-03

1-06

1-07

1-07

1-02

1-11

1-15

0-91

0-80

0-97

ravityC.

Oo

&

0-874

0-874

0-874

0-875

0-874

0-874

0-874

0-875

0-875

0-875

0-875

0-876

0-875

0-874

0-874

0-874

0-874

0-874

0-874

0-874

0-874

0-875

0-875

1904

Optical

Rotation

1=100 mm.

t=20°.

} + 1°81'

+ 1°45'

+ 2° 8'

+ 1°32'

|+1° 33'

+ 2° 8'

+1° 45'

+ 2° 20'

+ 2° 21'

+ 2° 21'

+ 2° 30'

+ 2° 44'

+ 3° 5'

+ 3° 8'

+ 3° 30'

+ 3° 12'

+ 3° 31'

+ 3° 48'

+ 2° 51'

+ 4° 20'

+ 2° 50'

NEROLI OILS.

ation

nificatiNo.

I

43

45

46

45

47

53

56

45

47

46

43

45

46

44

45

47

48

50

48

49

47

Solubility in Alcohol of 80 per Cent, at 22°.

/I vol. in 1 vol. alcohol, insoluble when

\ more alcohol was added

1 vol. in 1-5 vol. alcohol, insoluble

when more alcohol was added

insoluble

do.

do.

do.

do.

do.

1 vol. in 1 vol. alcohol, insoluble when

more alcohol was added

1 vol. in 1-2 vol. alcohol, insoluble

when more alcohol was added

do.

1 vol. in 1 vol. alcohol, insoluble when

more alcohol was added

do.

do.

do.

do.

do.

1 vol. in 1 vol. and in every propor-

do. j

do.

1 vol. in 1 vol. alcohol, insoluble when

more alcohol was added