crude oil was evidently due to the aromadendral, although the pinene was also 

 laevo-rotatory to a small extent ; phellandrene was absent. This left rotation is 

 unusual with oils of this class, as in most cases the pinene shows a predominant 

 dextro-rotation. The cineol content was only fair, and the oil did not contain 

 constituents having special characters; the species has, therefore, little value as 

 an oil-producing tree. 



The crude oil had specific gravity at 15 C. = 0-9108 ; rotation a D - 

 3-2; refractive index at 20 - 1-4659, and was soluble in 7 volumes 70 percent, 

 alcohol. The saponification number for the esters and free acid was 5-6. 



On rectification, a few drops of acid water, together with some aldehydes, 

 came over below 167 (corr.). Between 167-172, '9 per cent, distilled; between 

 172-198, 75 per cent, came over, and between 198-270, n per cent, distilled. 

 These fractions gave the following results : 



First fraction, sp. gr. at 15 C. = 0-8909 ; rotation a D - - 2-6 ; refractive 



index at 20 = 1-4612. 

 Second ,, ,, ,, = 0-9065; rotation a D - 3-0; refractive 



index at 20 = 1-4628. 

 Third ,, ,, ,, ; 0-9296; rotation a D - - 3-3; refractive 



index at 20 = 1-4827. 



The cineol was determined by the resorcinol method in the rectified portion, 

 and calculated for the crude oil; the result was 50 per cent. By the phosphoric 

 acid method it was 43 per cent, when calculated for the crude oil. 



The rectified oil was tinged yellow, a peculiarity common with the oils of 

 this group. This colour is traceable to quinone influence, derived from the 

 phenol present in the oils of certain groups of the cineol class, but is not shown 

 by the oils from the "Peppermints" or the "Ashes." 



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

 the Trans. Roy. Soc., South Australia, 1916. 



96. Eucalyptus stricta. 



(Sieb., in DC. Prod., iii, 28, Mem. Myrt, t. 8.) 



Systematic. A shrubby species with linear-lanceolate, shining leaves, of 

 a leathery texture and the veins scarcely visible, but upon removing the cuticle 

 the exposed venation resembles that of the group to which E. Smithii (R.T.B.) 

 belongs. Peduncles short axillary, with five to eight rather small flowers in the 

 umbel. Calyx small, under 2 lines in diameter, gradually tapering into a thick 

 pedicel ; operculum hemispherical, shortly acuminate. 



Fruit. Oblong, shining, contracted at the thin 

 rim ; capsule sunk ; valves not exserted ; 

 under 6 lines long. 



Great care is required not to confound these with those 

 of E. obtusiflora and E. apiculata. 



Habitat. Blue Mountains and Clyde District, New South 

 Wales. 



