removed from the edge. Oil dots numerous. Peduncles axillary, with few 

 flowers (five to seven) in the head, occasionally only three. Calyx hemispherical, 

 shortly acuminate. 



Fruit. Hemispherical to oblong; rim, together 

 with the valves, domed and leaving only a 

 slight aperture to the ovary, or it is 

 sometimes thin and the valves cxsertcd and 

 wide-spreading. 



I "try difficult to determine from E. viminalis in most 

 instances. T lie specimen d-: Dieted s/in-a-s the /t'vs dom-.'d 

 or truncate rim form. 



Habitat. -Mount Vincent, Ilford ; Obcron-road, O'Conncll ; 

 Southern-road, \Yingello; along the main \\Ystern- 

 road, Blaekheath, and Mount Victoria, New South 

 Wales. 



REMARKS. In the field this tree might be confounded with E. viminalis, Labill., or E. hcemastcma, Sm., 

 as botli these Kucalypts have a smooth bark, which, however, in this species never has the horizontal (insect) 

 markings almost invariably occurring on E. viminalis, nor the " scribbles " found on E. hcemasloma. It has almost 

 similarly shaped leaves in all its stages of growth, whilst the abnormal leaves of /:. viminalis are narrow, cordate- 

 lanceolate, sessile. The fniits diitVr little from those of E. viminalis in shape, rim, and direction of valves. The 

 trees, too, are not found near water, as obtains almost invariably with E. viminalis, but on dry, stony ridges. It 

 differs also from that species in the constituents of its oil. It resembles E. maculosa, R.T.B., in the shape of the 

 fruits, but differs from it in timber and bark. The specific name refers to the copious exudation of a milky 

 substance from the stem when the tree is cut at certain seasons of the year. 



ESSENTIAL OIL. Leaves and terminal branchlets for distillation were 

 obtained at Ilford, New South Wales, in September, 1899. The yield of oil was 

 0-54 per cent. The crude oil was red in colour, and had a turpentine-like odour, 

 far from pleasant. Pinene was the chief terpene and phellandrene was absent. 

 Cineol was only present in small amount, about 10 per cent. It is a terpene oil, 

 and of little commercial value. The crude oil had specific gravity at 15 C. = 

 0-8826; rotation nil; refractive index at 20 = 1-4845, and was soluble in 2 

 volumes 80 per cent, alcohol. The saponification number for the esters and free 

 acid was 8-56. The presence of cymene was indicated. 



On rectification no less than 90 per cent, distilled between 165-188 C. 

 This rectified oil had specific gravity at 15 = 0-8788; and rotation a D - - 1-16. 



Material of this species for distillation was also obtained fromTBraidwood. 

 New South Wales, in October, 1898. The results with this oil were in agree- 

 ment with that distilled from the Ilford leaves. The yield of oil was 0-57 

 per cent. 



On rectification 88 per cent, distilled below 188 C. The crude and rectified 

 oils gave the following results : 



Crude oil, sp. gr. at 15 C. = 0-8752 ; rotation nil. 

 Rectified oil ,, = 0-8698; ,, ,..-- 0-52. 



The saponification number for the esters and free acid was 11-5, and 

 it was soluble in 5 volumes 80 per cent, alcohol. 



The mixed oils of the above had been kept in the dark, and in October, 

 1919, the sample was again analysed. Not much alteration had taken place in 

 the character of the oil during the 20 years it had been stored, with the exception 



