The cineol was determined by the resorcinol method in the portion 

 distilling below 188. When calculated for the crude oil the result was 22 per 

 cent. By the rapid phosphoric acid method it was 21 per cent, when calculated 

 for the crude oil. 



The Pinene.A. portion of the first fraction was shaken with 50 per cent, 

 resorcinol to remove the cineol, the remaining oil fractionated, and the portion 

 distilling below 158 separated. The nitrosochloride prepared with this melted 

 at 104 C., thus con lii ruing the previous indications for pinene. 



27. Eucalyptus microcorys. 



(F.v.M., Frag, ii, 50.) 

 Tallow-wood. 



Systematic. A tall tree, with a pale-coloured flatish, broken bark, 

 branchlets quadrangular. Abnormal leaves ovate, about 3 inches long, 

 acuminate, membraneous, pale on the under 'surf ace ; venation distinct, lateral 

 veins very spreading, intramarginal vein removed from the edge. Normal leaves 

 lanceolate, varying in length up to 6 inches or longer, rather thicker than the 

 earlier leaves, pale- on the underside; venation distinct, lateral veins spreading, 

 intramarginal one removed from the edge. Oil dots very numerous. Peduncles, 

 flattened, axillary or in short terminal panicles or corymbs, generally about six 

 flowers in the head. Calyx small, pedicel slender, 4 to 6 lines long; operculum 

 small, domed. 



Fruit. Conical, elongated, rarely cylindrical, some- 

 times angular at the base ; double-rimmed ; 

 valves slightly exserted ; about 6 lines long, 

 3 lines in diameter. 



resemble those of E. Ferguson! in shape, 

 but smaller, and with a thicker rim. 



Habitat. Northern Coast district of New South Wales and 

 into Queensland. 



REMARKS.--A well-marked and distinct species, characterised chiefly by its pale-coloured, hard, durable, 

 greasy-natured timber. Hark pale-coloured or yellowish, not ridged. It appears to be always known vernacularly 

 as " Tallow-wood," anil is never confounded by settlers and timber-getters with any other species. The leaves have 

 a great resemblance to those of E. ochrophloia of the north-west interior of New South Wales, and Bentham's placing 

 of Eraser's specimens from that locality under E. microcorys, B. Fl. iii, 213, is very probably an error, as E. micro- 

 corys, as at present understood, does not occur west of the Main Dividing Range. Fraser's species are probably 

 E. ochrophloia, F.v.M. Bentham may have been misled by the morphology of the species and also probably not 

 having sufficient field notes from collectors to guide him to a correct determination. 



ESSENTIAL OIL. Leaves and terminal branchlets for distillation were 

 obtained from Tumbulgum, N.S.W., in October, 1897. The yield of oil was o'5i 

 per cent. The crude oil was but little coloured, had a turpentine-like odour, and 

 was turbid. After the lapse of some years the oil still remained turbid. It 

 may be, perhaps, that this turbidity is associated in some way with the 

 increased cineol content that takes place in many oils of this class on keeping, 

 particularly as an increase in cineol was noticeable even after storing the 

 oil for only three years. When it was first distilled the amount of cineol 



