143 



The mixed oil of this species was preserved in the dark, and in September, 

 1919, twenty-one years afterwards, was again analysed. Not much alteration 

 had taken place in the oil during that period, except that the cineol had 

 apparently increased, and consequently the specific gravity also. 90 per cent, 

 of the oil distilled below 190 C. The crude oil and the large fraction gave the 

 following results : 



Crude oil, sp. gr. at. 15 C. : 0-9383; rotation a D + 4-4; refractive 



index at 20 = 1-4667. 

 - 0-92,20; rotation -j- 3 - 5 ; refractive 



index at 20 = 1-4599. 

 The cineol was determined in the large fraction by the resorcinol method 

 and calculated for the crude oil ; the result was 81 per cent. By the phosphoric 

 acid method it was 79 per cent, when calculated for the crude oil. 



Large fraction 



Material of this species was also obtained from Bungendore, N.S.W., in 

 June, 1898. The oil differed but slightly from that obtained from Ilford, with 

 the exception that the specific gravity was somewhat higher. Considering the 

 difference in the time of year this was to be expected, as the present sample 

 was distilled in midwinter. The yield of oil was 0-68 per cent. It was rich 

 in cineol and free from phellandrene 



Leaves of this species, the "Butt-butt," of Gippsland, Victoria, were 

 received from Mr. A. W. Howitt, F.G.S., in July, 1898. The oil from this material 

 differed in no respect from the above samples ; was equally rich in cineol, contained 

 pinene, and phellandrene was absent. The yield of oil was 0-58 per cent. 



Later, in September, 1899, we received material of this species for dis- 

 tillation from Mr. J. F. Campbell, who obtained it at Walcha, N.S.W. It had 

 been collected as would be done for commercial distillation. The crude oil was 

 of an orange-yellow colour, and had an odour characteristic of oils belonging to 

 the cineol-pinene class. Cineol was the principal constituent ; it also contained 

 some pinene, but phellandrene was absent. The higher boiling portion consisted 

 largely of the sesquiterpene. The ester was small in amount, similar to the 

 other oils of this species so far tested. The rectified oil was slightly tinged yellow, 

 a character common with the rich cineol oils belonging to this class. 



In April, 1908, material of this species was sent from Woolbrook, N.S.W., 

 by the Museum collector. The oil distilled from this was identical with that from 

 material sent from Walcha many years previously. 



The following results were obtained with the crude oils from these two 

 localities : 



