Oils and Fats. 41 



Remarks.— This oil is from the same 

 source as Nos. 3 and 3*. The percent- 

 age of " total alcohols " is much the 

 same as in No. 3*. but the percentage ot 

 geraniol has increased whilst that of 

 citronella has diminished. The yield 

 obtained in this distillation was 0"27 

 per cent. 



No. 4. 



Quantity : 120 cc. ; distilled August 7 

 and October 1, 1907. 



Description : Pale lemon-yellow oil 

 with a pleasant odour. A slight deposit 

 was present. 



Results of Examination. 



Specific gravity at 15715° C = 0-913. 



Optical rotation in 100 mm. tube at 

 20° C = - 12° 26'. 



" Total alcohols " (geraniol and citro- 

 nellal) = 57'8 jper cent. 



Geraniol = Hl'5 per cent. 



Citronellal = 26'3 per cent. 



Solubility in alcohol : gives a clear 

 solution in its own volume of 80 per cent, 

 alcohol, but becomes slightly opalescent 

 with 10 volumes of the alcohol. 



Remarks.— This oil is derived from 

 " lena-batu-pengiri" from Matara. The 

 grass has been identified by Dr. Stapf as 

 Cymbopogon Nardus, Rendle, lena-batu. 

 This grass is the usual source of Ceylon 

 citronella oil, and this sample of oil has 

 the normal characters of the poorer 

 Ceylon citronella oils (compare Nos. 4*, 

 12, and 12*, which are all from the same 

 grass). The yield of oil in this distil- 

 lation was 0-42 per cent. 



No. 4*. 



Quantity: 290 cc ; distilled July 24, 

 1908. 



Description : Deep golden yellow oil, 

 quite clear, with a somewhat pungent 

 odour. There was practically no deposit 

 present in this instance. 



Results of Examination. 



Specific gravity at 15715° C = 0-913, 



Optical rotation in 100 mm. tube at 

 21° C = — 13° 6'. 



"Total alcohols" (geraniol and citro 

 nellal) = 62-1 per cent. 



Geraniol = 37*9 per cent. 



Citronellal = 24'2 per cent. 



Solubility in alcohol : gives a clear 

 solution in its own volume of 80 per cent, 

 alcohol, but becomes very slightly opal- 

 escent with 10 volumes of the alcohol. 



Remarks. — This oil is from the same 

 source as No. 4. It shows a larger per- 

 centage of " total alcohols " as compared 

 with No. 4, owing to the greater per- 



l [December, 1910.. 



centage of geraniol present. This oil 

 closely resembles a medium quality of 

 Ceylon citronella oil as at present ex- 

 ported- The yield of oil in this distil- 

 lation was - 48 per cent. 



No. 5. 



Quantity : 130 cc. ; distilled June 29 and 

 September 22. 1907. 



Description : Pale yellow oil, having a 

 pleasant citronella odour. A slight 

 deposit was present in the bottle contain- 

 ing the oil. 



Results of Examination. 



Specific gravity at 15715° C = 0'909. 



Optical rotatiou in 100 mm. tube at 

 21° C = + 4° 54'. 



" Total alcohols " (geraniol and citro- 

 nellal) = 56-5 per cent. 



Geraniol= 38'6 per cent. 



Citronellal =17"9 per cent. 



Solubility in alcohol : gives a clear 

 solution with its own volume of 80 per 

 cent, alcohol, but becomes opalescent 

 with 10 volumes of the alcohol. 



Remarks.— This oil is derived from 

 "light-leaved mana" grass, which Dr. 

 Stapf has identified as Cymbopogon 

 Nardus, Rendle, var. Linnwi, Stapf 

 (typicus), which makes it identical with 

 the grasses yielding oils Nos. 1, 1*, 1% and 

 2, 2", 2**. The two oils Nos. 5 and 5* differ 

 from groups 1 and 2 in showing a de- 

 crease in geraniol and an increase of 

 citronellal in the later distillates. The 

 yield of oil in this distillation was 0-26 

 per cent- 



No. 5*. 



Quantity : 134 cc. ; distilled August 4, 

 1908. 



Description : Very dark coloured oil, 

 having a strong odour more pungent 

 than that of No. 5. A small deposit was 

 present. 



Results of Examination. 



Specific gravity at 15715° C = 0-908. 



Optical rotation in 100 mm. tube at 

 22° C = + 3° 30'. 



"Total alcohols" (geraniol and citro- 

 nellal) = 64"0 per cent. 



Geraniol == 30'2 per cent. 



Citronellal = 33'8 per cent. 



Solubility in alcohol : gives a clear 

 solution with its own volume of 80 per 

 cent, alcohol, but becomes opalescent 

 with 10 volumes of the alcohol. 



Remarks. —This grass is from the same 

 source as No. 5. It contains an unsually 

 high percentage of citronellal, and in 



