2DJ 



1'ln- a1 ove sample was stored in the dark, and in December, [919, was again 

 analysed. Ver} little alteration had taken place in the oil during the twenty-two 



3 i1 had been kept, md evidently constituents prone to alteration are pi 



call} absent in the oil of this species. ["here was apparentlj incineol. 



64 pei cent, distilled below [90 < . Tin- < rude oil and the rectified | ortion gave 

 the following results 



Crude oil, sp. gr. a1 15 ( . < > ■ < » 1 « #7 : rotation a ■+- 5-0 ; refractive index 



20 1-4775- 

 Rectified portion ,. = 0-8996; rotation a D + 5*4 ; refractive index 



at 20 i- 1.654. 

 The cineol was d( termined bj the resorcinol method in the re< tified portion ; 

 when calculated for the crude oil the result was 32 per cent. By the rapid 

 phosphoric acid method, the resull was 26 pei cent, when calculated for the 

 crude oil. 



141. Eucalyptus acmenioides. 



(Si hau., in Walp. Rep . ii, 924.) 

 White Mahogany. 



Systematic. — A tall tree, with a lightish-coloured stringybark. Leaves 

 lanceolate, thin, mostly about 4 inches long and 1 inch wide, dark green on the 

 upper surface, pale underneath, sometimes shining; venation distinct, in relief 

 on the under surface ni leaf, lateral veins oblique, parallel or spreading, intra- 

 marginal vein removed from the edges! Flowers axillary, peduncles flattened, 

 about six in each umbel ; pedicels about 3 lines long, angled. Calyx tube tur- 

 binate, about 2 lines in diameter, and 2 lines long; operculum acuminate, shorter 

 than the calyx. 



Fruit.— Pedicellate, hemispherical; rim usually 

 thin, slightly sunk; valves not ex- 

 serted, the cells very distinct; 3 lines 

 in diameter. 



The nearest fruits in shape to these arc [when 

 immature) E. umbra 1 . next E. Bosistoana, 

 E. melliodpra and E. carnea. 



Habitat.- Coast district, New South Wales; Queensland. 



REMARKS. This is a di ken in the herbarium no1 to confuse it wi1 



R.T.B., as the early fruil rible eacl other. These lattei 



differ from it in i ii normal leavi beii nd thick, and with a uniform greyish 



colour liaving a thick rim, whilsl I oil of all three are also di 



fhese species presi eographical range. 



ESSENTIAL OIL. Leaves and terminal branchlets for distillation wen- 

 obtained from Lismore, N.S.W . in August, [900. The yield of oil was small, 

 Miik n.I oz. being obtained from 594 Lb. oi Leaves; equal to o-og per cenl The 



