516 R. T. BAKER AND H. G. SMITH. 



It differs from E. amygdalina Labill. in the shape of the 

 fruit, lacking the slightly domed rim of that species, and 

 is less inclined to top-shape, whilst the leaves are longer, 

 and the lateral veins less acute than in that species. Labil- 

 lardiere's species has a bluish tint after drying, a character 

 not occurring in this species. Systematically, it might be 

 placed next to E. piperita. 



Timber. — The timber is pale but darkening to a light 

 chocolate on exposure, is very fissile, and subject to gum 

 veins. Among Eucalypts it might be ranked as a second 

 class timber. It is light in weight, and suitable for general 

 building purposes. Opinions vary as to its durability in 

 the ground. 



Distribution. — It has an extensive geographical distribu- 

 tion on the ranges of Victoria and New South Wales, and 

 probably it extends into Queensland, the localities being 

 too numerous to publish here. 



Essential Oil. 

 The production of an excellent pharmaceutical Euca- 

 lyptus oil from this species depends largely upon a fact 

 which was first demonstrated by us in 1902, and published 

 in the " Research on the Eucalypts," p. 170. We were 

 able, at that time, to show that by fractional separation at 

 stated times during the primary distillation, an oil richer 

 in cineol could be obtained, particularly if the portion which 

 came over during the first hour was separated. The cineol 

 was thus more easily distilled than the alcoholic bodies 

 and other oil constituents in the leaf. By taking advant- 

 age of this peculiarity, and working the trees growing at 

 Nerrigundah, Yourie, and neighbouring districts of New 

 South Wales in the same way, it has been possible to pro- 

 duce a product of a fairly constant character, high in cineol 

 content, and answering to the requirements demanded for 

 a first class pharmaceutical Eucalyptus oil. The results 



