174 



about ten miles from Oberon, N.S.W. The yield of oil was 3-3 per cent. The 

 crude oil was of a pale yellow colour, and had a pleasant odour with a secondary 

 one of citral. Phellandrene was not detected. 



The constitution of the oil was quite in accord with that distilled from 

 the Yourie material above, although the distance separating the two localities is 

 about 200 miles. 



The crude oil, which was distil'ed right out, had specific gravity at 15 C. 

 = 0-9141; rotation a D + 5-4; refractive index at 20 = 1-4634, and was soluble 

 in 1-2 volumes 70 per cent, alcohol. The saponification number for the esters 

 and free acid was 10. After acetylation this had risen to 47-7 ; while in the 

 cold with two hours' contact it was 15-8. 



On rectification, i per cent, distilled below 172 C. (corr.). Between 

 172-193, 92 per cent, distilled, and between 193-235, 6 per cent, distilled. 

 These fractions gave the following results : 



First fraction, sp. gr. at 15 C. = 0-9106; rotation a D + 5-3; refractive index 



at 20 = 1-4614. 



Second ,, ,, ,, = 0-9170; rotation D + 3-2; refractive index 



'at 20 = 1-4684. 



The cineol was determined by the resorcinol method in the first fraction ; 

 when calculated for the crude oil the result was 67 per rent. By the rapid 

 phosphoric acid method it was 64 per cent, when calculated for the crude 

 oil. The alcohols present were geraniol and terpineol, as in the oil from the 

 Yourie material. 







The Citral. The secondary odour of the oil of the Black Springs sample 

 was distinctly that of citral. To determine the identity of this aldehyde 1,000 c.c. 

 of the crude oil were distilled, and all boiling below 190 C. removed. The 

 remainder was agitated with neutral sodium sulphite until the reaction was 

 complete. The aqueous portion was washed with ether, decomposed with 

 sodium hydrate, again extracted with ether, and on removal of this solvent 2-5 c.c. 

 of an aldehyde remained, equal to 0-25 per cent. This had an odour of citral, 

 and gave the following figures : Specific gravity at 15 C. = 0-894, was inactive 

 to light; had refractive index at 20 = 1-4875, and the /3-naphthocinchoninic 

 acid melted at 199-200 C. These constants are those for citral. It was probably 

 derived from the natural oxidation of the geraniol, which alcohol is a constant 

 constituent in the oil of this species. 



Eucalyptus Alistraliana, (R.T.B. & H.G.S.). var. latifolia (nobis). 



Systematic. This appears to be the most southern form of the species, 

 and is distinguished from its type by the broad leaves and larger shining fruits. 

 These two latter features greatly resemble those of E. dives, especially the fruits; 

 the venation of the leaves easily shows it not to be that species. It is figured 

 under E. amygdalina in the first edition. The abnormal leaves are large, cordate, 

 sessile, acuminate ; the venation well marked, the marginal vein being well removed 

 from the edge. The normal leaves are long, up to 9 inches in length, broad lanceo- 

 late, intramarginal vein well distant from the edge. 



Habitat. -Officer, Victoria; Moruya, N.SAV. 



