IIm crude oil was red in '"lour, and had a somewhaf rank odour, difficult 

 to define; the secondarj odour was no1 aromatic. ' It contained phellandrene 

 m fairly large quantity, and cineol appeared to be absent. From the colour 

 with phosphorii acid and also with bromine, together with the specifi< 

 gravity ol the crude oil, there appeared to be a fail amount oi the sesquiterpene 

 present. Qie specifii gravit) ol the crude oil a1 i =, C. 0*9039. Owin 

 the dark colour "I the nil, light did not pass. The saponification number for 

 the esters and free acid was 7-1. Although the oil was' insoluble in to volumes 

 70 per cenl alcohol, yel i1 cleared with 1 volume 80 per cent., thus indicating 

 thr presence of alcoholic bodies in the higher boiling portion. 



143. Eucalyptus pilularis. 



(Sm . 111 Trans. Linn. Soc, iii. 284; B. II., iii, jo8.) 

 Blackbutt. 



Systematic. One of the tallest trees of the Genus. Leaves thick, shining, 

 sometimes over <> inches long, lanceolate, falcate, oblique, drying a very pale 

 colour; venation indistinct, lateral veins parallel, intramarginal vein removed 

 from tin- edge. Flowers on axillary, flattened peduncles of about 6 lines long, 

 mostly six in the umbel. Calyx tube slightly over 2 lines in diameter, pear- 

 shaped, on a pedicel of from 2 to 3 lines long; operculum about 3 lines long, 

 hemispherical or acuminate. 



Fruit. Pedicellate, semi-globose, truncate; rim 

 sometimes contracted, thin, countersunk 

 or broad and even domed ; valves not ex- 

 serted; about 5 lines in diameter. 



'I'hcse fruits are very close in form to E. dextropinea, 

 hut the rim in the latter case is generally broader and 

 the former mostly countersunk. 



Habitat. Coast district and Tableland, New Smith Wales; 

 Vii toria ; Queensland. 



RE MA RKS. " Blackbutt " is a tree well know a to timber gi tters and the trade, and offi rs no difficulties 

 of determination eithei in thi field 01 thi Herbarium, for in the latter it can be named from thi leaves alone. The 



bark varies a lit 1 1 times being dark-coloured pad stringy, and at other times light reddish i oloured and 



loosely strin 



ESSENTIAL OIL. — Leaves and terminal branchlets for distillation were 

 obtained from the following New South Wales localities : -Canterbury, in June, 

 1897; Canterbury, in August, 1898; Belmore, in November, 1898; and Currawang 

 (reek, in November, iXo,N. The yields of oil from these localities varied between 

 0-08 and 0-18 pei cent. The crude oils were of a light-amber colour, with a rank 

 odour, difficult to define. Phellandrene was present, but cineol detected only in 

 very small quantity (5 to 10 per cent.). Pinene was only present in small amount. 

 The higher-boiling portion consisted largely of the sesquiterpene, and ii also con 

 tained a quantity of the liquid form oi eudesmol; this was shown by the increased 

 dextro-rotation. After the oil wa - a< e\ 5 lated, it had a high saponification number, 

 indicating the presence of free alcoholic bodies, and the saponified oil was also 

 somewhat aromati* . This high boiling alcohol is characteristic of the oils of 

 several Eucalyptus species, and iis presence i- shown by the high rotation figures 

 of the highei boiling fractions. The crystallised form of eudesmol was not 



