IOQ 



inclined at about 45 to the mid-rib. Peduncles 3 to 4 lines long, at first axillary, 

 bearing umbels of about six flowers. Buds shining. Calyx tube semi-ovate, 

 little more than one line long, on a pedicel of equal length; operculum conoidal, 

 semi-ovate, as long or slightly longer than the tube. 



Fruit. Small, hemispherical to pilular, shining; rim 

 narrow, slightly domed; valves acuminate, 

 much exserted ; i \ lines long and ij lines 

 in diameter. 



Similar in shape and differs only in the minutest 

 details from those of E. olcosa. 



Habitat. Western Australia. 



REMARKS. It is just possible this may be the Western tree-form of E. oleosa, for these species have much 

 in common, and the physical and chemical properties are not easy to separate. 



ESSENTIAL OIL. Material for distillation was received from Western 

 Australia in August, 1904. The exact locality from which the leaves were 

 collected is not known, but the consignment was forwarded from Perth. The 

 material had been collected as is usual for commercial purposes. The yield 

 of oil was 1-44 per cent. The crude oil was reddish in colour, indicating the 

 presence of phenols, and an odour representative of the cineol-pinene Eucalyptus 

 oils generally, with a secondary one suggesting aromadendral. The principal 

 constituents in the oil were dextro-rotatory pinene, cineol, and a sesquiterpene. 

 Phellandrene was not present, and the amount of volatile aldehydes was 

 small. High-boiling constituents were only present in small amount, and 92 

 per cent, distilled below 183 C. The Icevo-rotation of the higher boiling 

 fraction was due to the aromadendral. Although the oil contained a fair amount 

 of cineol, yet it was deficient in the quantity demanded by the British Pharma- 

 copoeia standard. 



The crude oil had specific gravity at 15 C. == 0-9076, rotation D + 6-3; 

 refractive index at 20 = 1-4681, and was soluble in 3^ volumes 70 per cent, 

 alcohol. The saponification number for the esters and free acid was 4-9. 



On rectification i per cent, distilled below 166 C. (corr.) Between 

 166-172, 40 per cent, distilled; between 172-183, 50 per cent, came over, and 

 between 183-224, 6 per cent, distilled. These fractions gave the following 

 results : 



First fraction, sp. gr. at 15 C. = 0-8973 ; rotation a D + 10-6. 

 Second ,, =0-9077; ,, + 4-6. 



Third ,, ,, = 0-9194; ,, 3-0. 



The cineol, determined by the phosphoric acid method in the crude oil, 

 was 48 per cent. (O.M.). 



The rectified oil boiling below 183 (90 per cent, of the whole) had specific 

 gravity at 15 = 0-9052, and gave a return of 52 per cent, cineol, when determined 

 by phosphoric acid (O.M.). 



The oil of this species is thus a fair one, but owing to the comparative 

 absence of high-boiling constituents the gravity is low. 



The results obtained with the oil of this species were published by us in the 

 Pharmaceutical Journal, London, September, 1905. 



