Material for distillation was also obtained from the abnormal leaves in 

 order to test the value of the oil from this portion of the plant ; the leaves were 

 collected at Wingello, N.S.W., in February, 1901. The yield of oil was 1-8 per 

 cent. In appearance, odour, and constituents, the oil was identical with that 

 obtained from the mature leaves, with the exception that the pinene was a little 

 higher and the cineol a little less in amount ; but even then the oil formed a clear 

 solution with ij volumes 70 per cent, alcohol. The specific gravity of the 

 crude oil was 0-9133, and the optical rotation a a + 6-4. The saponification 

 number for the esters and free acid was 3. Eudesmol was detected in small 

 amount. It is thus evident that the oil from the leaves of this species may 

 be profitably distilled, especially as the yield is large for an oil so rich in cineol. 

 In other parts of this work it is demonstrated that plantations of this species 

 could be utilised with advantage for Eucalyptus oil distillation, so that by 

 systematic cultivation the difficulty of collecting the leaves from mature trees 

 might be avoided. 



When the whole of the factors in regard to the oil of this species are taken 

 into consideration, it may be regarded as one of the best Eucalypts, so far 

 determined, for the production of a rich cineol Eucalyptus oil. The following 

 reasons in support of this statement may be advanced : 



1. The yield of oil from both abnormal and mature leaves is large. 



2. The oil from both abnormal and mature leaves is practically of equal 



value. 



3. The oil is very rich in cineol. 



4. A relative absence of constituents of high-boiling point avoids much loss 



on rectification. 



5. The comparative absence of esters and objectionable volatile aldehydes 



allows the rectified oil to be of superior quality. 



6. The species lends itself to ready cultivation. 



See also the article on "The Variation in the character of Eucalyptus Oils 

 distilled from trees of differing ages and forms of growth." 



74. Eucalyptus Bridgesiana. 



(R.T.B., Proc. Linn. Soc., N.S.W., 1898, p. 164, t. V). 

 Apple or Woolly-butt, Butt Butt of Gippsland (A. W. Howitt). 



Systematic. A tree of considerable size, grows to a great height, par- 

 ticularly in loamy soil. Bark whitish grey, wrinkled or tesselated, short and 

 brittle in the grain, not fibrous, almost identical with that of the " Boxes," and 

 when freshly cut exhales an aroma similar to the ordinary oil obtained from 

 Eucalyptus leaves. Abnormal leaves in the early stage ovate-cordate, and then 

 ovate-acuminate, petiolate or sessile, opposite or alternate. Normal leaves on 

 rather long petioles, lanceolate, acuminate, often falcate, varying in length to 

 over i foot, not shining, the southern form drying a light grey colour, the 

 northern a darkish green; lateral veins either prominent or faint, spreading, the 



