i88 



Material for distillation was also obtained from Gunbar, N.S.W. in 

 December, igoo. The yield of oil was 0-98 per cent. In appearance, odour, 

 constituents, &c., this oil differed but little from the above sample, with the 

 exception that it was less rich in cineol and contained more terpenes, and perhaps 

 more aromadendral. The specific gravity of the crude oil = = 0-9016, and optical 

 rotation a D + 2-2. The cineol in the crude oil, determined by the phosphoric 

 acid method, was 33 per cent. (O.M.). 



PLATE Llll. 



Photo.] [R. H. Cambage. 



EUCALYPTUS DUMOSA. A. CUNN 



WHITE" OR 'BULL MALLEE." 



In June, 1911, leaves and terminal branchlets for distillation were 

 collected at the Kingscote end of Kangaroo Island, South Australia, where it is 

 known as " Red Mallee." The leaves of this species were somewhat thick, and 

 after steam distillation had become quite red in colour, particularly the young 

 shoots at the end of the branchlets. This peculiar red colour of the steam- 

 distilled leaves, was also observed with those of E. Icucoxylon, but not with the 

 leaves of the " White Mallee," or of any other species from Kangaroo Island. 



The yield of oil was 0-96 per cent. The crude oil was reddish in colour, 

 and in odour resembled the oils of the pinene-cineol group. Cineol was present 

 in fair quantity, but phellandrene was absent. The low-boiling terpene was 

 dextro-rotatory pinene, and the high-boiling fraction consisted principally of 

 the sesquiterpene. A greater quantity of dextro-rotatory pinene was prerent 

 in this oil than in those of the New South Wales samples. 



The crude oil had specific gravity at 15 C. = 0-9041 ; rotation D + 16-4 ; 

 refractive index at 20 = 1-4667, and required i volume 80 per cent, alcohol 

 to form a clear solution. The saponification number for the esters and free acid 

 was 3-7. 



