APPENDIX. 135 
(a)p = —55°, while oils of turpentine are more or less dextrogyre, 
(French oil of turpentine is levogyre.) (Am. Journ, Pharm., 
Dec. 1891. 
Neroli oil. 
In order to be able to submit neroli oil to a closer examination, 
Messrs, Schimmel obtained in the spring of last year, from the 
Riviera, a large quantity of the flowers of the bitter orange. The 
blossoms were consigned preserved in diluted sea-water, and were 
received in good condition with the full odour of fresh flowers, 
From the equivalent of 560 kilos of fresh flowers, there was obtained 
by a process of cohobation 0-460 gram of pure neroli oil, which in 
many respects differed from the best French distillates met with in 
commerce. It had a specific gravity of 0-887, and was optically 
inactive. Already at a temperature of + 11° C., it showed an 
abundant separation of a solid body in fine shining scales. At 0° 
the oil solidified toa mass of the consistence of butter. The stearop- 
tene of neroli oil, like the stearoptene of rose oil, appears to be a 
paraffin-like body ; it can be separated from the liquid portion of the 
oil by the addition of 90 per cent. aleohol, in which it is difficultly 
soluble. The specific gravity of eleven samples of commercial neroli 
at 15°C. Of nine oils, one was optically active, whilst the 
others were all dextrorotatory, the rotation varying between + 0°52’ 
and + 9°40’. Only one solidified at 0° C., the others remained 
liquid and did not show any separation of stearoptene upon the addi- 
tion of 90 per cent. alcohol. Thecause of these differences between 
e Schimmel’s distillate and commercial samples is not expli- 
cable without further investigation. 
J&gle Marmelos. 
The extract from the flower, called in English Marmel water, and 
- known in Sinhalese as ‘“‘ Pinidiya,” is used by the natives as scent one 
festive occasions. It is also sometimes added in the preparation of, 
sweetmeats for flavouring them. During the flowering season, boys 
and men in the villages surrounding Colombo may be seen plucking 
the flowers and bringing them in baskets to the town for sale, wher 
ae are readily bought for distillation. An infusion of the flower is 
used as a cooling drink. (H. D. Lewis in “ Trop. Agric.,” Sept. 
1438. p. 218.) 
