140 



yellow in colour, and had an odour resembling those of the cineol-pinene oils 

 generally. Volatile aldehydes were present, but only in small amount, and 

 the esters were also in a minimum quantity. The oil was exceedingly rich in 

 cineol. Pinene was the principal terpene, and phellandrene was absent. Only a 

 small amount of constituents having a high-boiling point (aromadendrene, &c.) 

 was present, and 96 per cent, of the crude oil distilled below 183 C., conse- 

 quently the specific gravity was comparatively low for an oil so rich in cineol. 

 The oil of this species is one of the best of the whole group for the distillation 

 of a rich cineol bearing Eucalyptus oil. Crystallised eudesmol in small amount 

 was present, although in that from the abnormal leaves it was difficult to detect. 

 A solid paraffin was also present. 



The crude oil had specific gravity at 15 C. 0-915; rotation a D + 6-15; 

 refractive index at 20 C. = 1-4649, and was soluble in ij volumes 70 per cent. 

 alcohol. The saponification number for the esters and free acid was 2-4. 



On rectification i per cent, distilled below 168 C. (corr.). Between 

 168-173, 64 per cent, distilled; between 173-183, 31 per cent, distilled. These 

 fractions gave the following results : 



First fraction, sp. gr. at 15 C. = 0-911 ; rotation a D + 7-0. 

 Second ,, ,, = 0-914; ,, + 4-14. 



The cineol, determined by the phosphoric acid method in the crude oil, 

 was 70 per cent. (O.M.). 



Material for distillation was also obtained from Irish Corner Mountain, 

 Monga, N.S.W., in September, 1898. This second consignment was received in 

 order to test the constancy of results as regards the oil of this species. The 

 yield of oil was 1-6 per cent. The colour, odour, and constituents differed in no 

 respect from those of the previous sample, and 96 per cent, distilled below 

 183 C. By tabulating the results it is seen how closely the oils agree in general 

 characters, the fractions and percentages being practically identical with each. 

 Both oils were equally rich in cineol. 



Material of this species for distillation was also obtained from Wingello, 

 N.S.W., in April, 1900. The yield of oil was 1-14 per cent. The oil differed in no 

 respect from the previous samples, and was equally rich in cineol. The specific 

 gravity of the crude oil was 0-9158, and the optical rotation a D + 4-9. The 

 amount of esters was also in agreement. 



Since that time much oil from this species has been distilled commercially, 

 and all the samples we have tested have shown great uniformity, and 

 evidently the species is one that has long been stabilised. 



