ill 



the hand 



i" P i I his "Flora ^ustralicnsis," \..l iii, ^..j. rank. Mueller, 



in '■ l ii. iK ptographia," D Dec. 10, 1884, synonyi 



n his second < n ime Deal ' I *., N.S.W 



11- affinities at hmanniana and 



1, and nnalK thai ".ill thai remains 1- to give tin- name ol cenl interment " 



Maiden, in Ins "Critical Revision ••! the Genus Eucalyptus," Vol 1. p 2 thai / rgala and 



e conspecifii I in the same work, Vol t, p. 284, 1919, \ nk and 



places it above E. Luehmanniana, F.v.M., stating, however, tha aed to New South w 



ESSENTIAL OIL. Material for distillation was obtained from Spring- 

 wood, X.S.W.. in September, t8gg I lie yield oi oil was 0*29 per cent. When 

 distilled the oil was found to consisl very largeh oi crystallised eudesmol, thai 

 substance being present in Mich quantity thai the oil solidified in the receiver. 

 A fresh consignmenl ol leaves was then received, and this on distillation gave 

 similar results. The material thus obtained was undoubtedly the mosl remark- 

 able Eucalyptus oil we had seen up to thai time. Only traces oi cineol were 

 detected, while the low-boiling terpenes consisted principally of phellandrene. 

 rhe oil "t this species has little resemblance to that obtained from E. Sieberiana, 

 as eudesmol does not occur in the oil oi the latter species. The peppermint con- 

 stituent, piperitone, is present in small amount in the oil of E. virgata. Fresh 

 material of E. Sieberiana was obtained on purpose to test the constancy, but the 

 oil corresponded with that obtainable at all times from the leaves of E. Sieberiana, 

 and had little resemblance to that derived from this species, owing to the absence 

 of eudesmol. The oil distilled from the first consignment of leaves was analysed 

 with the following results :— 



The crude oil had specific gravity at 15 C. = 0-9154; refractive index at 

 20° = 1-4958, and was soluble in 1 volume 80 per cent, alcohol. The saponifi- 

 cation number tor the esters and free acid was 5-7. 



On rectification, 1 per cent, distilled below 173 C. (corr.). Between 173- 

 188°, 54 per cent, distilled ; between 188-272 , io per cent, came over, and between 

 272-285 , 31 per cent, distilled. These fractions gave the following results :— 



First fraction, sp. gr. at 15° C. = 0-8683; rotation a D - 31-08°. 



Second ,, ,, ,, = 0-8796; ,, 17-40°. 



Several years later, in June, 1912, material for distillation was obtained 

 from St. Mary's, Tasmania. The yield of oil was 0-79 per cent., which is greater 

 than that from the N.S.W. trees. The oil consisted largely of phellandrene and 

 eudesmol, the terpene in the greater proportion, and the eudesmol in correspond- 

 ingly less amount than was present in the Australian oil, otherwise the agreement 

 was very close; this can be seen from the following results. The crude oil was 

 but little coloured, and had a secondary odour of peppermint, due to the presence 

 oi a small quantity oi | iperitone. Cineol was readily detected in small amount. 



The principal constituent in this oil was phellandrene, and pinene probably 

 absent. Eudesmol was presenl in quantity, the high-boiling fraction becoming 

 solid alter a few horns. Only a very small amount of ester was present in the 

 crude oil. Although the phellandrene shows the larvo-rotatory modification in 

 excess, yet, judging from the comparatively small rotation, and the almost entire 

 absence ol pinene, it seems possible that the phellandrene ol opposite rotation 

 was also present. So far dextro-rotatory phellandrene has not been isolated 

 from any Eucalj ptus oil. 



I 1m crude oil had specifii gravity at 15° C. = 0-8883; rotation ,7,, 20-9 ; 

 refractive index at 20 [-4810, and was soluble in 3 volumes 80 per cent, alcohol. 

 This comparatively ready solubility is largely due to the presence oi eudesmol. 

 I lie saponification number for the esters and free acid was 3-3. 



