198 



oil of any one species varies slightly at different times of the year. Pinene was 

 present in the oil of this species, and from the results, as well as on theoretical 

 grounds, it would appear that the oil consisted very largely of cineol and pinene, 

 with a small quantity of phellandrene. 



The crude oil had specific gravity at 15 C. = 0-9046 ; rotation a D + 6.5 ; 

 refractive index at 20 = 1-4649, and was soluble in 6 volumes 70 per cent, 

 alcohol. The saponification number for the esters and free acid was 7-2. 



On rectification 2 per cent, distilled below 162 C. (corr.). Between 

 162-183, 83 per cent, distilled ; between 183-255, 8 per cent, came over, and 

 between 255-270, 4 per cent, distilled. These fractions gave the following 

 results : 



First fraction, sp. gr. at 15 C. = 0-9012 ; rotation a D + 7-2-. 



Second ,, ,, = 0-9201; ,, + 1-23. 



Third ,, ,, ,, = 0-9331 ; ,, not taken. 



The cineol, determined by the phosphoric acid method in the large 

 fraction, was 60 per cent. (O.M.), indicating about 52 per cent in the original oil. 



The above results being unusual for an oil so rich in cineol, a second 

 distillation was made, but in this instance the rectification was carried to 190 C. 

 The large fraction represented 88 per cent, of the original oil. It had a specific 

 gravity of 0-9019 at 15 C., and optical rotation a D + 7-1. The cineol deter- 

 mined by the phosphoric acid method was 59 per cent. (O.M.), a mean of closely 

 agreeing results. 



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

 March, 1901. It had specific gravity = 0-9042, contained similar constituents 

 to the above, and was soluble in 6 volumes 70 per cent, alcohol. 



Material of this species for distillation was also obtained from Barber's 

 Creek, N.S.W., in June, 1898. This is the cold time of the year in Australia, 

 and consequently the oil contained less pinene and had a higher specific gravity. 

 The yield of oil was also less. The ester content was somewhat high in this 

 sample, and phellandrene could not be detected, indicating a diminution of that 

 constituent at this time of the year. The specific gravity of the crude oil was 

 0-9321 ; and optical rotation D + 5-0. The fraction (81 per cent, distilling below 

 183 C.) had specific gravity = 0-9143 ; and optical rotation a D + 6-6. The 

 saponification number for the esters and free acid was 21-96. The cineol, deter- 

 mined by the phosphoric acid method in the rectified oil, was 60 per cent. 

 (O.M.). The crude oil formed a clear solution with i| volumes 70 per cent, 

 alcohol. 



103. Eucalyptus OValifolia, R.T.B. var. lanceolata. 



(R.T.B. & H.G.S., in Euc. and their Ess Oils, 1st Ed., 1902, p. 124.) 



Systematic. A typical forest tree, with a smooth bark. Leaves lanceo- 

 late, 4 to 6 inches long or more, rarely above i inch broad, thin, almost mem- 

 braneous, not shining, dull green colour on both sides, occasionally drying 

 brownish ; petiole slender, over i inch in length ; venation finely defined, lateral 



