December, 1910.] 497 Oils and Fats. 



Comparison of Citronella Oils. 



Number. 1 



Nfif.lvA Wjinifl 



i>uLauitai n num. 



Ua\ivj Ui XJ lovlllfXLHJLl, 



Yield per 

 Cent. 



"Total Alco- 

 hols" per Cent. 



Geraniol 

 per Cent. 



1 Citronellal 

 | per Cent. 



1 



Maha-naran-pengiri ... 



Cymbopogon Nardus, 

















Rendle, var. Linncei, 

















Stapf (typicus) 



Aug. 5 and Sept. 30, 1907 



0'18 



51 '6 



27 -6 



24-0 



I* 



Do. 



do. 



May 2, 1908 



0'06 



63 2 



38 '4 



24-8 



1#* 



Do. 



do. 



August 27, 1908 



0'20 



57 '2 



36 '2 



21-0 



2 



Heen-naran-pengiri .. 



do. 



June 26 and Sept. 20, 1907 



20 



43*5 



24 - 6 



18-9 



2* 



Do. 



do. 



May 5, 1908 



0'1C 



47-7 



25 '8 



21-9 



2** 



Do. 



do. 



Aug. 26, 1908 



- 25 



53 - 5 



30-0 



23-5 



5 



Light-leaved maua ... 



do. 



June 29 and Sept. 22, 1907 



0'26 



56 - 5 



38-6 



17-9 



5* 



Do. 



do. 



Aug. 4, 1908 



0-20 



64'0 



3u - 2 



338 



9 



Small-leaved niana ... 



do. 



July 5 and Sept. 26, 1907 



C'22 



57 '0 



34 -4 



22 6 



9* 



Do. 



do. 



Aug. 19, 1908 



33 



56 -3 



36 - 5 



19'8 



10 



Sour maua 



do. 



June 30 and Sept. 27, 1907 



- 15 



35"3 



16"3 



190 



10* 



Do. 



do. 



July 31, 1908 



0'04 



26 • 9 



6'3 



20'6 



11 



Very broad-leaved 















mana 



do. 



June 28 and Sept. 28, 1907 



(C17 





25 '8 



22 - 9 



11* 



Do. 



do. 



August 15, 1908 



O'lO 





36 5 



28*2 



15 



Mana grass 



do. 



June 22 and Sept. 18, 1907 



0-25 



48 - 6 



25-5 



23-1 



15* 



Do. 



do. 



Aug. 17, 1908 



0-42 



56'4 



35 "8 



20 6 



3 



Called in Galle "lena 















batu-pengiri " 



0. Nardus, Rendle, ap- 















proaching var, con- 

















tertiflorus, Stapf 



July 3 and Sept. 21, 1907 



0'17 



52"0 



31-1 



20-9 



3* 



Do. 



do. 



May 9, 1908 



0*10 



63'1 



39.5 



23-6 



3*# 



Do. 



do. 



Aug. 22, 1908 



0*27 



64"2 



44'8 



19-4 



6 



Glaucous-leaved mana 



C. Nardus, Rendle, var. 















confer tiflorus, Stapf... 



July 6 and Sept. 23, 1907 



0-45 



46'5 



29 3 



17-2 



6* 



Do. 



do. 



August 21, 1908 



0'25 



61 '2 



43 • 7 



17 - 5 



7 



White-stemmed mana 















when collected ; since 

















transplanted, stems 

















coloured 



do. 



July 2 and Sept. 24, 1907 



0'24 



54'8 



30-2 



24-6 



7# 



Do. 



do. 



Aug. 12, 1908 



0-11 



58-0 



24-8 



332 



8 



Red-stemmed mana ... 



do. 



July 1 and Sept. 25, 1907 



0-16 



39-1 



194 



19-7 



8* 



Do. 



do. 



Aug. 14, 1908 



0-15 



57-0 



28-9 



28-1 



4 



Lena-batu-pengiri, 















Matara 



C. Nardus, Rendle, 

















Lena-batu 



Aug. 7 and Oct. 1, 1907 



0-42 



57'8 



31 5 



26-3 



4* 



Do, 



do. 



July 24, 1908 



0-48 



62-1 



37'9 



24-2 



12 



Lena batu-pengiri 



do. 



Aug. 6 and Oct. 2, 1907 



0-46 



59-9 



26-3 



33-6 



12* 



Do; 



do. 



July 27, 1908 



0-56 



61-3 



34-5 



26-8 



14 



Maha-pengiri 



G. Wintenanus, Jowitt 



June 11, 1907 



0-59 



79-0 



32-5 



46-5 



14 a 



Do. 



do. 



Nov. 2, 1907 



0-77 



84-8 



24-1 



60-7 



14* 



Do. 



do. 



Aug. 29, 1908 



0-59 



33-5 



30-9 



52'6 



27* 



Do. 



(No botanical specimen 















supplied ; possibly C. 

















Nardus, Lena-batu)... 



Aug. 28, 1908 |( 



)-51 i 



59-6 



36-0 



23-6 



General Remarks. 



The results obtained in the examination 

 of these various citronella oils are of 

 great interest, and it would be useful to 

 have the experiments continued with a 

 view to the settlement of the following 

 points : — 



1. The character and quantity of oil 

 yielded by lena-batu and maha-pengiri 

 grasses, at different stages of growth 

 and at different seasons of the year. 

 63 



2. The effects of various manures on 

 the yield and quality of oil obtained 

 from these grasses. 



These two sets of experiments would 

 need to be conducted on independent 

 plots, in order that the influence of age 

 and season on the oils should not be 

 obscured by the effects of manuring. 

 Results op the Examination of 

 Lemongrass Oil from Ceylon. 



Imperial Institute, No. 20,033, dated 

 July 23, 1910. 



