237 



On rectification, 2 per cent, distilled below 172 C. (coir.). Between 

 172-183, 61 per cent, distilled ; between 183-260, 18 per cent, came over, and 

 between 260-275, 15 per cent, distilled. These fractions gave the following 

 results : 



First fraction, sp. gr. at 15 C. = 0-9092 ; rotation a v + 3-60. 

 Second = 0-9152; + 1-79. 



Third ,, ,, = 0-9402; ,, not taken. 



The cineol, determined by the phosphoric acid method in the first fraction, 

 was 42 per cent., indicating about 28 per cent, in the crude oil (O.M.). 



Material of this species for distillation was obtained from Moss Vale, N.S.W., 

 in March, 1899. I R general characters the oil differed but little from that dis- 

 tilled from the Cadia material. It contained a little more phellandrene, however, 

 and the cineol was hardly so pronounced, otherwise the differences were slight. 



The crude oil had specific gravity at 15 C. == 0-9044; rotation a D + 3-7; 

 refractive index at 20 = 1-4796, and was soluble in 2 volumes 80 per cent, alcohol. 

 The saponification number was 6-1. 



Later, in April, 1912, material for distillation was obtained from Hobart, 

 Tasmania, and consisted of leaves and terminal branchlets, collected as would 

 be done for commercial purposes. The crude oil was of an olive-brown colour, 

 fairly rich in cineol, contained pinene, and a small amount of phellandrene. 

 Phellandrene appears to be a constant constituent in the oil of E. viminalis, and 

 helps to distinguish the normal form from those somewhat closely related. A 

 considerable quantity of high-boiling constituents was present, consisting largely 

 of the sesquiterpene, consequently the oil was insoluble in 70 per cent, alcohol. 

 The results obtained with this oil from trees growing in Tasmania, agree closely 

 with those of the oil of E. viminalis grown in Australia, thus showing the 

 Tasmanian trees to be identical with those on the mainland. The chemical 

 results thus support botanical indications. 



The yield of oil was 0-74 per cent. The crude oil had specific gravity at 

 15 C. = 0-9154; rotation a D + 4-2; refractive index at 20 = 1-4707, and was 

 soluble in i volume 80 per cent, alcohol. The saponification number for the 

 esters and free acid was 9-5. 



On rectification, the usual amount of acid water and volatile aldehydes, 

 for oils of this group, came over below 167 C. (corr.). Between 167-173, 

 22 per cent, distilled ; between 173-194, 54 per cent, distilled, and between 

 194-269, 20 per cent, (the greater portion above 255 C.). These fractions 

 gave the following results : 



First fraction, sp. gr. at 15 C. ==0-8969; rotation a D + 11-5; refractive 



index at 20 = 1-4622. 

 Second ., ,, ,, - 0-9088; rotation n + 3-4; refractive 



index at 20 = 1-4625. 



Third ,, ,, ,, = 0-9308; rotation D + 4-1; refractive 



index at 20 = 1-4928. 



The rectified oil was yellowish in tint, resembling in this respect the oils 

 of the members of the " Gum " group of Eucalypts. The cineol was determined 

 by the resorcinol method in the portion boiling below 194 C., and when calculated 

 for the crude oil represented 50 per cent. By the phosphoric acid method the 

 result was 41 per cent, in the crude oil. 



