Oils and Fata. i 

 No. 1. 



Quantity: 53 cc; distilled August 5 

 and September 30, 1907. 



Description : Pale yellow oil having a 

 rather pleasant citronella odour. There 

 was a slight deposit at the bottom of 

 the bottle containing the oil, consisting 

 in part of needle-shaped crystals. 



Results of Examination. 



Specific gravity at 15715° 0= 920. 

 Optical rotation in 100 mm. tube at 21* 



C = — 3 7'. 



"Tofal alcohols" (geraniol and citro- 

 nellal), calculated from saponification of 

 acetylated oil = 51 "6 per cent. 



Geraniol, by phthalic anhydride me' 

 thod=27'6 per cent. 



Citronellal, -try difference =24*0 per cent- 

 Solubility in alcohol : gives a clear 

 solution with its own volume of 80 per 

 cent, alcohol, but becomes slightly 

 opalescent on the addition of 10 volumes 

 of the alcohol. 



Remarks. — The grass yielding this oil 

 is " niaha naranpengiri," from the Ku- 

 maragamuwa district of Matara. This 

 has been named by Dr. Stapf Cymbo- 

 pogon Nardus, Rendle, var. Linnmi, 

 Stapf (typicus). The total yield of oil 

 from this grass in the two distillations 

 furnishing the sample was 0"18 per cent. 



No. 1*. 



Quantity : 46 cc. ; distilled May 2, 1908. 



Description : Pale yellow oil, of plea- 

 sant citronella odour. As in the case 

 of No. 1, the bottle contained a small 

 solid deposit. 



Results of Examination. 



Specific gravity at 15°/15 D C = 0-905. 



Optical rotation in 100 mm. tube at 20° 

 C = -6 e 32'. 



" Total alcohols " (geraniol and citro- 

 nellal) = 63'2 per cent- 



Geraniol =38'4 per cent. 



Citronellal = 24-8 per cent . 



Solubility in alcohol : gives a clear 

 solution with its own volume of 80 per- 

 cent, alcohol, but becomes opalescent 

 on the addition of 10 volumes of the 

 alcohol. 



Remarks.— The source of this oil is the 

 same as that of sample 1, viz., "maha- 

 naran-pengiri." The yield of oil was 

 only 0*06 per cent, on this occasion. 

 The oil differs from No. 1, chiefly in the 

 higher percentage of geraniol present- 



No. 1**. 



Quantity : 67 cc. ; distilled August 

 27, 1908. 



3 [DECEMBER, 1910. 



Description : Lemon-yellow-eoloured 

 oil, lighter in shade than Nos. 1 and 1*, 

 and rather more pungent in odour. A 

 small quantity of deposit, partly crys- 

 talline, was present. 



Results of Examination. 

 Specific gravity at 15°/15 Q =0-912. 



Optical rotation in 100 mm. tube at 21° 

 0= +3° 22'. 



" Total alcohols " (geraniol and citro- 

 nella) = 57 f 2 pei- cent. 



Geraniol=36'2 per cent. 



Oitronellal=21'0 per cent. 



Solubility in alcohol : gives a clear 

 solution with its own volume of 80 per 

 cent, alcohol, and shows slight opal- 

 escence with 10 volumes. 



Remarks.— This oil, like Nos. 1 and 1*. 

 is derived from "maha-naran-pengiri." 

 It contains rather less geraniol and 

 citronellal than No. 1*, but is much 

 richer in the former constituent than 

 No. 1. The yield on distillation was 0"20 

 per cent. 



No. 2. 



Quantity : 281 cc. ; distilled June 26 and 

 September 20, 1907. 



Description : Deep yellow oil with a 

 rather pleasant odour, similar to that of 

 No. 1. A slight deposit was present. 



Results of Examination. 

 Specific gravity at 15°/15 o =0-913. 

 Optical rotation in 100 mm. tube at 21" 

 C = +2° 35'. 



"Total alcohols" (geraniol and citro- 

 nellal) = 43'5 per cent. 



Geraniol = 24'6 per cent. 



Citronellal = 18*9 per cent. 



Solubility in alcohol : gives a clear 

 solution in 1"3 volume of 80 per cent, 

 alcohol, but becomes opalescent with 

 10 volumes. 



Remarks.— This oil is derived from 

 " heen-naran-pengiri," from Weligama, 

 Matara, which is regarded by Dr. Stapf 

 as identical with " maha-naran-pengiri " 

 (oilsl, It, and 1**), and has been named 

 by him Cymbopogon Nardus, Rendle, 

 var. Linnaii, Stapf (typicus). The yield 

 of oil in this distillation was 20 per 

 cent. 



No. 2*, - 



Quantity : 105 cc. ; distilled May 4, 1908. 



Description : Pale lemon-yellow oil, 

 with an odour more pungent than that 

 of No. 2.. A very slight deposit was pre- 

 sent. 



Results of Examination. 

 Specific gravity at 15715° C = 0'894. 



