39» 



parison, the average results obtained in the analysis of other citro- 

 nella oils of commerce. 





Sample from Kellas 

 Estate. 



Java oil. 



Ceylon oil. 



Specific gravity 



Refractive index 



Optical rotation in loo 



mm. tube 

 Solubility in 80 per cent. 



alcohol 



Geraniol 



Citronellal (by difference) 



0.8948 at 15° C. ... 

 1.4858 at 24 C- 



— 1 34' at 24 C. ... 

 I in 1 or more vols 

 of alcohol 



32.7 per cent. 

 55-3 



1 



0.892 



- 0° 50' to 2° 26... 



I in i or more vols 

 of alcohol 



3i.9to 38.1 per cent. 

 50.4 to 55.3 „ 



O.908 

 -9° 36' 



1 in 1 vol. becom- 

 ing cloudy on 

 further addition 

 of alcohol 



32.9 per cent. 

 28.2 



These results show that this sample of citronella oil from the 

 Kellas Estate is of good quality, and that in composition it more 

 nearly approximates to Java oil than to that produced in Ceylon. 



Commercial Valuation. 



A sample of the oil was submitted to a firm of commercial 

 experts, who were also informed of the results of the chemical 

 examination, for valuation. They reported that the oil was very 

 similar to samples of the same material previously received from 

 Singapore and that it would be worth about 2s. per pound. On the 

 same day Ceylon citronella oil was quoted at is. 6\d. to is. jd. 

 per pound. 



PATCHOULI OIL. 

 Description of Sample. 



The sample measured about four fluid ounces and was labelled 

 " Pure Patchouli Oil, distilled on the Kellas Estate, 7th December, 

 1904." The oil was of a dark lemon yellow colour and possessed 

 the characteristic strong persistent odour of patchouli. 



Cliemical Examination. 



The sample was examined in the Scientific and Technical Depart- 

 ment of the Imperial Institute, and gave the results recorded in the 

 following table, to which have been added the results given by 

 other samples of commercial patchouli oil. 





Oil from Kellas 

 Estate. 



Oil imported from 

 Singapore. 



Oil distilled from 

 Patchouli leaves 

 in Germany. 



Specific gravity 



o-9525 



0.957 to 0.965 



0.970 to 0.995 



Optical rotation in ioo 



-43° 31' 





mm. tube 



—44 to— 50 



— 50 to —68° 



Refractive index 



1.5063 



Solubility in 90 per cent. 









alcohol 



1 in 7.4 vols. 



I in from 3 to 7 



I in 1 vol. . 







vols. 





