400 THE CHEMISTEY OF ESSENTIAL OILS
I. Physical Characters of the Complete Otto.Colour of the otto .....
Specific gravity at 15° G
Optical rotation, aD at 27° C....
Solidifying-point .....
Temperature at which the otto becomes com-
pletely liquidPale yellow
0-8618- 2° 28'
- 19° C.
- 23-5° C.
II. Solid Portion, Insoluble in 75 per Cent. Alcohol.
Stearoptene
Elaeoptene (by difference) ....
Melting-point of the stearopfcene
Coefficient of saponification of the stearopteneIII. El(Eoptene.
Specific gravity at 15° C.
Optical rotation, ao at 15° C.
„ ,, of the acetylated oil
Decrease in rotation
Solubility in 70 per cent, alcohol.
Solidifying-point ....Acid value
Ester,,.......
Saponification value .....
„ ,, of the acetylated oil
„ ,, „ formylated oil.
Percentage of esters, as citronellyl acetate.
Combined alcohols \
Free „ V as citronellol, C 10 H«,() 0
Total „ )
Percentage of citronellol (by formylatiou)
,, ,, geraniol (by difference)
Composition of the alcoholic mixture-! geraniol °
J23-1 per cent.
76-9
+ 31-5° C.
6-50-8809
- 2° 26'
- 1° 16'
1°10'
1 vol., then cloudy
Becomes cloudy
but does not solidify
at - 15° C.
1-4
10-3
11-7
259-5
121-3
3-63 per cent.
2-9
86-8
89-7
35 8
53-9
39-9
60'1IV. Results Calculated to the Complete Otto.
Stearoptene ....
Free acids (as acetic acid)
Esters (as citronellyl acetate)
Gitronellol ....
Geraniol and phenylethyl alcohol
Terpenes, etc. (by difference)23-1 per cent.
0-37
2-79
27-53
41-44
4-77SPARTAN OTTO OF EOSE.
For some few years past there has been a commercial utilisation of
the rose flowers growing naturally in the valley of Lake Burdur in the
interior of Asia Minor.
Lake Burdur is situated between the town of that name and Isbarta.
This latter is the ancient Sparta of Pisidia, which was a flourishing town
in the days of Alexander the Great. The whole of this district is in-
habited by an essentially agricultural population, who own land of mag-
nificient fertility. The climate is mild, and the valley, protected by the
mountains against cold and frost, is most favourably situated for the
culture of roses.
Most of the peasants own stills for the distillation of their flowers,
while there are other cultivators in a rather better position who buy up