254 



REMARKS. lVntham (B. I'M., iii. p. 11$) placed t ln~ species under E. brachyboda, Turcz., a Western 

 Australian Eucalyptus, bul Mueller, in las Eucalyptographia restores it to specific rank, mentioning that 

 Drummond's specimens, upon which Bentham worked, were withoul lnuts. The species is a good one. and the 

 tree has .in extensive range over tin- interior, where it is one of the largest of tin Genus. It is rough barked, the 

 ulterior braa 1 i" tng smooth; the timber is reddish in colour, hard, and durable. It is chiefly characterised 

 by its small hemispherical fruits, with prominently protruding valves. It is known by several vernacular names 

 throughout it geographical distribution, besides tin- above, such as ■• Swamp Box," " Goborro," &c. 



ESSENTIAL OIL. — Leaves and terminal branchlets for distillation were 

 obtained from Narrabri, N.S.W., in April, 1902. The yield of oil was 0-48 per 

 cent. The crude oil was reddish in colour, and had an odour reminding strongly 

 of cymene. A considerable quantity of phellandrene was present in the oil, and 

 pinene was also determined. Cineol was present only in small amount, hardly 

 exceeding 5 per cent, in the crude oil. Aldehydes were not detected in the higher 

 boiling portions, but those usually found were present in the lower. When the 

 oil of the third fraction was diffused, a distinct cinnamon odour was detected ; 

 this has been noticed in several Eucalyptus oils. The higher boiling portion 

 consisted largely of the sesquiterpene. Free alcoholic bodies were also present. 



The crude oil had specific gravity at 15 C. = 0-8855 ; rotation a D — 27-2° ; 

 refractive index at 20 = 1-4838, and was insoluble in 10 volumes 80 per cent, 

 alcohol. The saponification number for the esters and free acid was 4-3. 



On rectification, 1 per cent, distilled below 156 C. (corr.). Between 

 156-172 , 52 per cent, distilled; between 172-224 , 27 per cent, came over, and 

 between 224-274 , 16 per cent, distilled. These fractions gave the following 

 results : — 



First fraction, sp. gr. at 15 C. = 0-8645 ; rotation a D — 34 - 2°. 



Second „ ,, ,, =0-8659; » - 37'^° • . 



Third ,, „ = 0-9338; „ -2-8°. 



The third fraction was acetylated ; the saponification number had then 

 risen to 38-5, showing the presence of alcoholic bodies in this portion. The 

 alcohol was probably the non-crystallised form of eudesmol, particularly as the 

 crystalline body had not been detected at any time. 



This sample of- oil had been stored in the dark, and in October, 1919, was 

 again analysed. Very little alteration was observed, except that the specific 

 gravity had increased a little, and the rotation diminished about half. The 

 cineol had not increased. 67 per cent, distilled below 190 C. 



The crude oil had sp. gr. at 15 C. = 0-9089; rotation a D -- 12-2°; refractive 



index at 20 = 1-4894. 

 The rectified portion ,, = 0-8723; rotation a D — 21-7°; refractive 



index at 20° = 1-4754. 

 The cineol, determined by the resorcinol method, was 5 per cent, when 

 calculated for the crude oil. 



That the higher-boiling portion consisted largely of the sesquiterpene is 

 shown by the results obtained on distillation at 10 millimetres pressure. The 

 principal fraction boiled at 130-135 C. ; had specific gravity at 15 = 0-932; 

 rotation a D 4- 2-5°; refractive index at 20 = 1-5052, and saponification number 

 after acetylation = 28-5. 



