123 



The above sample had been preserved in the dark, and in August, 1919, 

 was again analysed. The alteration that had taken place in the oil during the 

 22 years it had been kept was not very pronounced ; the specific gravity had 

 increased somewhat, and a precipitate had formed; perhaps the cineol had also 

 increased as indicated from the results with the fractionated oil. 



On rectification 90 per cent, distilled below 190 C. The results with the 

 crude and rectified oils were as follow : 



Crude oil, sp. gr. at 15 C. = 0-9249 ; rotation a D + 3-0 ; refractive index 



at 20 = 1-4699. 

 Fraction ,, ,, = 0-9133; rotation a D + 2-4; refractive index 



at 20 = 1-4651. 



The cineol, determined by the resorcinol method in portion distilling below 

 190 and calculated for the crude oil, was 69 per cent. By the rapid phosphoric 

 acid method it was 56 per cent, when calculated for the crude oil. 



63. Eucalyptus accedens. 



(W.V.F., in Jour. W.A. Nat. Hist. Soc., i, 21, 1904.) 



Systematic. A medium-sized tree, attaining a height of 60 feet, with a 

 smooth persistent, greyish or white bark, blotched with patches of darker colour. 

 Abnormal leaves broad-ovate, up to 6 inches long and 6 inches across, thick and 

 coarse, petiolate, often cordate at the base. Normal leaves ovate to lanceolate, 

 sometimes falcate, averaging 3 to 4 inches long, thick, often acuminate ; venation 

 not conspicuous, intramarginal vein not far removed from the edge, lateral 

 veins inclined at about 40 to the mid-rib. Flowers about eight in umbels, the 

 common peduncle axillary or lateral, slightly angular, about 8 lines long. Calyx 

 tube turbinate, about 3 lines long, tapering to a pedicel not quite as long; 

 operculum ij lines long, semi-ovoid, rounded at the apex. 



Fruit. - Turbinate or sub-cylindrical, sometimes 

 conoidal, scarcely or not contracted at 

 the orifice; rim narrow, counter-sunk, 

 grooved at the top and usually cracked 

 transversely; valves slightly exserted; 4 to 

 5 lines long, 3 lines broad. 



Amongst the Eastern species the nearest in shape to 

 these are E. ochrophloia and E. Fergusoni. 



Habitat. Restricted to Western Australia. 



ESSENTIAL OIL. Leaves and terminal branchlets of this species for 

 distillation were received from Mr. C. E. Lane-Poole, the Conservator of Forests, 

 Western Australia. The material was collected in August, 1918. The yield of 

 oil was 0-87 per cent. The crude oil was red in colour and had an odour similar 

 to those of the cineol-pinene oils of the " Gum " group. The chief terpene was 

 dextro-rotatory pinene ; phellandrene was absent, and cineol only present in 

 fair amount. Crystallised eudesmol was detected. The esters were mostly 

 high-boiling, and the oil contained some sesquiterpene. 



The crude oil had specific gravity at 15 C. = 0-9084 ; rotation, a D + 13-4 ; 

 refractive index at 20 = 1-4691, and was soluble in 9 volumes 70 per cent, 

 alcohol. The saponification number for the esters and free acid was 4-6. 



