ESSENTIAL OILS OF THE ANGOPHORAS. 113 



The average yield of oil was 0*19 per cent. The crude 

 oil was somewhat darker in colour than that of A, Bakeri, 

 due to the larger amount of ester and free acid in the oil, 

 the latter more readily attacking the iron of the still. The 

 odour resembled that of A. Bakeri, and the aromatic 

 secondary odour was also similar. 



The chief constituents in the oil of this species were 

 identical with those in the oil of A. Bakeri, although the 

 geranyl-valerianate was a little more pronounced, as was 

 also the sesquiterpene. Phellandrene and cineol were, of 

 course, both absent. 



The crude oil had specific gravity at 15° C. = 0.8809 ; 

 rotation a D = + 24°.9; refractive index at 21°.5 = 1*4678 ; 

 and was insoluble in 10 volumes 80 per cent, alcohol. 



On redistilling 100 cc. of the crude oil, a small amount 

 of acid water, some volatile aldehydes and the constituent 

 with a pear-like odour came over below 155° C. (corr.). 

 Between 155 — 160°, 31 per cent, distilled ; and between 

 160 — 193°, 41 per cent. The thermometer then rose to 

 225°, and between that temperature and 265°, 20 per cent, 

 distilled, with some decomposition. These fractions gave 

 the following results : — 



Sp. gr. at 15° C. Rotation a D Ref. index at 20° C. 

 First fraction =0*8638 -f 37°.6 1*4630 



Second fraction =0*8648 + 34°.6 1*4638 



Third fraction =0*9250 too dark 1*4846 



The first two fractions were again distilled when 46 per 

 cent, of the whole oil came over to 156° (corr.) and 13 per 

 cent, between 156 - 157°. 



These two fractions gave the following results : — 



Sp. gr. at 15° C. Rotation a D Ref. index at 19° C. 

 First fraction =0*8615 + 37°.9 1*4642 



Second fraction = 0*8621 -f 36°.8 1*4644 



H— August 6, 1913. 



JUL 14 1914 



