i6o 



ESSENTIAL OIL. Leaves and terminal branchlets of this species for 

 distillation were forwarded by Mr. Walter Gill, the Conservator of Forests, 

 South Australia. The material was collected at the Parilla Forest Reserve, 

 of that State, in October, 1919. The yield of oil was 0-9 per cent. 



The crude oil was red in colour and had an odour resembling the cineol- 

 pinene oils generally. The constituents present were dextro-rotatory pinene, 

 cineol, alcoholic bodies, a small amount of esters and a little sesquiterpene. 

 Phellandrene was absent, and eudesmol not detected. 



The crude oil had specific gravity at 15 C. = 0-9216; rotation a D + 4-8 ; 

 refractive index at 20 C. = 1-4657, and was soluble in 1-2 volume 70 per 

 cent, alcohol. The saponification number for the esters and free acid was 4-5. 

 After acetylation it was 36-9, and in the cold with two hours' contact it 

 was 27. 



On rectification, 2 per cent, distilled below 165 C. (corr.). Between 

 165-171, 18 per cent, distilled ; between 171-193, 67 per cent, came over ; 

 between 193-235, 5 per cent, distilled, and between 235-267, 7 per cent. 

 These fractions gave the lollowing results :- 



First fraction, sp. gr. at 15 C. = 0-9064; rotation a D + 11-8; refractive 



index at 20 = 1-4603. 

 Second ,, ,, ,, 0-9173 ; rotation D -f 5-7; refractive 



index at 20 = 1-4612. 

 Third ,, ,, 0-9340; rotation - - 5-0; refractive 



index at 20 = 1-4703. 

 Fourth ,, ,, ., : 0-9418; rotation too dark; refractive 



index at 20 i'4944- 



These results closely approximate to those of E. calycogona, with the 

 exception that the latter contained a little more pinene and consequently less 

 cineol. 



The cineol was determined by the resorcinol method in the portion dis- 

 tilling between 165-193 C., and calculated for the crude oil ; the result was 67 per 

 cent. By the phosphoric acid method it was 57 per cent, when calculated for 

 the crude oil. 



Material of the large fruited variety was also received for distillation from 

 Mr. Walter Gill, the Conservator of Forests of South Australia. It had been 

 collected on the West Coast of that State, in the Port Lincoln District, in 

 April, 1920. 



The yield of oil was 1-2 per cent. The crude oil was red in colour and 

 had an odour similar to those belonging to the cineol-pinene groups of Eucalyptus 

 oils. The constituents present were dextro-rotatory pinene, cineol, alcoholic 

 bodies, a small amount of esters, and come sesquiterpene. Phellandrene and 

 aromadendral were not present, nor was crystallised eudesmol detected. The 

 results with the oil of this form show it to agree with that of the small fruited 

 variety, with the exception that the pinene was more abundant and the cineol 

 correspondingly less in amount, which may be accounted for by the difference 

 in the time of the year. 



The crude oil had specific gravity at 15 C. = 09023; rotation a D + ir8; 

 refractive index at 20 1-4676, and was soluble in i volume 80 ' per cent, 

 alcohol. The saponification number for the esters and free acid was 5-8 by 

 heating, and 5.2 in the cold, with two hours' contact. 



After acetylation the saponification number was 36^25 by heating, and 

 22-34 m the cold, These results agree with the above. 



