M 



ESSENTIAL OIL. Leaves end terminal 

 obtained from Gbsford, N.S.W., in August, i n< ,7. The yield of oil w per 



cent. I In' crude oil was dark red in colour, caused by the oi acid 



attacking the iron oi the still, and the action oi the phenols on the iron thus 

 removed. The oil was quite limpid, and consisted largel} oi , and 



cymene, together with the sesquiterpene and esters. Cineol was presenl only 

 in traces, and phellandrene was absent, rhe oil had quite an unpleasant odour, 

 pr< ibably due to the \ alerii acid present. 



1 1 will be observed that with the variety pallidivalvis the oil contains an 

 excess of dextro-rotatory pinene, and consequent^ the cymene was less in 

 amount, but the high saponifr an. mi number and high acid value are similar with 

 both oils, while the 1 onstitution oi the esters is similar also. 



The crude oil of E. maligna had specify \ at 15' C. = 0-8731; 



rotation a D + i-r ; refractive index at 20° = 1-4789, and was soluble in 10 

 volumes 80 per cent, alcohol. The saponification number for the esters and free 

 acid was 26-2. 



On rectification 2 per cent, distilled below 170 C. (run.!. Between 

 170-180 , 75 per cent, distilled; between 180-240 , r.6 pei cent, came over; and 

 between 240 255°, 3 pei cent, distilled. The latter fractions were quite 

 The third fraction consisted largely of the sesquiterpene. The results with the 

 two first fractions were : 



Firsl fraction, sp. gr. at 15 C. = 0-8635; rotation a D + 2-3°. 

 Second ,, .. „ =0-8679; » + °'^°- 



The cineol did no1 exceed 5 per cent, in the firsl fraction. 



In October, 1919, material for distillation was obtained near Sydney. 1 lie 

 yield of oil was very small, 0-015 P er cent. The crude oil was limpid, and quite 

 similar in composition to that originally obtained in 1897 from material growing 

 a1 Gosford. The crude oil had specific gravity at 15 C. = 0-8846; rotation 

 not determined; refractive index at 20 = 1-4795, and was soluble in [0 volumes 

 80 per cent, alcohol. The saponification number for the esters and free acid 

 was 35-5 ; after acetylation the saponification number was 57, equal to 6 per 

 cent, of free alcohol with the ( U) H l8 molecule. 



On rectification, 61-5 per cent, distilled between 167 £82 C. It had 

 sp. gr. at 15 = 0-865; rotation a a + 8.3 , refractive index at 20 = 1-4767. 



This fraction was again distilled, when 50 pei cent, came over between 

 160-165 C, it had rotation a„ + 11-0°, and refractive index at 20 = 1-4724. 



The portion boiling above r.65 had rotation a D + 4-8 . and refractive 

 index at 20° = 1-4797. 11 had a strong cymene odour, and as this hydro- 

 carbon has be.n determined chemii all} for this group oi oils, there appears little 

 doubt but that it was presenl with the pinene in the oil of this species also, 



500G8— 1> 



