— 54 — 



Wickremaratne estimates the total yield per acre and year (four cuts) 

 at 18000 lbs. grass and, when the grass is in good condition, at 68 lbs. of oil. 



In our April Report of last year (p. 48) we referred to an article on 

 Andropogon- (Cymbopogon-) oils which had appeared in the Circulars and 

 Agricultural Journal of the Royal Botanic Gardens, Ceylon (Vol. V, No. 12, 

 November 1910, 115). The results of the investigations there recorded 

 have since been published also in the Bulletin of the Imperial Institute. 

 [9 (1911), 240, 333.] 



According to a communication by the Imperial Institute 1 ) in London 

 a sample of citronella oil received from the Gold Coast possessed the 

 following characters: di 5 o 0,903, « D + 2°56', total geraniol 76% (geraniol 

 33,9°/o, citronellal 42,1%), sol. in 2,8 vols 70% alcohol and in 1,4 vols 

 80% alcohol. The oil was of a pale yellow colour. The parent-plant is 

 thought to be Cymbopogon Winterianus. 



Oil from the leaves of Citrus Hystrix. According to Brooks 2 ), 

 the leaves of Citrus Hystrix, D. C. yield a maximum of 0,08 % of an 

 essential oil possessing the following constants: d~ 0,9150, « D — 10,50°, 

 n D 3oo 1,4650, sap. v. 50,2. Its odour resembles that of shaddock-leaf oil 

 (vide p. 116). 



Oil of Clausena Anisum-olens. As stated in our Report of October 1909 

 (p. 145), the leaves of Clausena Anisum-olens (Blanco), Merrill possess, ac- 

 cording to Bacon, a strong odour of Russian anise, for which reason they, 

 as well as their alcoholic extract, are employed on the Philippines in the 

 preparation of liqueurs. Brooks 3 ) obtained from the leaves of this Rutacea 

 a yield of 1,16% of a colourless oil possessing the following constants: 

 d|§ 0,963, « + 0, n D30O 1,5235, sap. v. 3,6. It consisted to the extent of 

 from 90 to 95% of methylchavicol, which was identified by oxidation into 

 homoanisic acid (m. p. 84 to 86°). 



According to Brooks, certain kinds of cigarettes made in the Philippines 

 are scented with the leaves of Clausena Anisum-olens. 



Clove Oil. The result of the winter-crop 1911/1912, which even at 

 the time of our last Report promised to be favourable, is probably not 

 over-estimated at 200000 bales, which is equal to an excess of about 

 70000 bales over that of the previous crop. Yet, in spite of these figures, 

 the prices have not receded to the extent expected, which is no doubt to 

 be ascribed to the fact that within the past few weeks somewhat important 

 sales have been effected both in London and in Hamburg. These sales 



i 



A ) Bull. Imp. Inst. 9 (1911), 253. 



2 ) Philippine Journ. of Sc. 6, A. (1911), 349. 



3 ) Philippine Journ. of Sc. 6, A. (1911), 344. 



