i^68 Biihcv and ISinith : 



Essential Oil. — We are indebted, through Mr. Audas, to Mr. C. 

 W. D'xVlton, of Hair.s Gap, Grampians, Vic, for the material for 

 chemical investigation. 



The leaves with terminal branchlets Avere tolleoted from trees 12 

 to 30 feet high. 



The leaves, which were thick and coriaceous, shoAved considerable 

 oil glands, but these must have been largely empty, judging from 

 the yield of oil, as this Avas only 0.36 per cent. 



The crude oil, which was thin and mobile, had a terpene-like 

 odour, suggesting that of turpentine. Phellandrene was not de- 

 tected, and Eucalyptol was only present in small amount. The 

 presence of the solid paraffin peculiar to some Eucalyptus oils 

 (Proc. Roy. Soc, N.S.W., July, 1913) was also determined. 



The results show this oil to consist largely of pinene. the laevo- 

 rotatory form predominating slightly. Although lielonging to the 

 group of Eucalypts producing a Eucalyptol-pinene oil, yet the 

 epecies has no commercial value as an oil-producing plant, the 

 yield being much too small, while the oil itself is deficient in 

 oxygen -bearing constituents. 



The crude oil had the following characters : — 

 Specific gravity at 15o C. =0.8973. 

 notation an=— 2.80. 

 Refractive index at 15o C. = 1.4779. 



Insoluble in 10 volumes 80 per cent, alcohol, and, owing to the 

 presence of paraffin, not entirely soluble in 90 per cent, alcohol. 



The saponification number for the esters was only 2.6, so that 

 esters were only present in very small amount. 



On re-distilling the crude oil, the usual amount of acid water and 

 volatile aldehydes for this class of Eucalyptus oils came over below 

 1550 C. (corrected). Between 1550 and 1630 no less than 66 per 

 cent, distilled. 



This fraction, which contained a little Eucalyptol, had the fol- 

 lowing characters : — 



Specific gravity at 15o C. =0.8669. 



Rotation an = — ^A)o. 



Refractive index at 15o C. = 1.4678. 



This fraction had an odour of turpentine, and gave the charac- 

 teristic nitrosochloride for pinene, thus showing this fraction to 

 consist largely of that terpene. 



Between 163o and 215o, 16 per cent, distilled (14 per cent, below 

 I8O0). This fraction, Avhich contained Eucalyptol, gave the follow- 

 ing :— 



