270 R. T. BAKER AND HENRY G. SMITH. 



entertained, and it was with the endeavour to determine 

 how far the constant botanical and chemical characters 

 hold that the present investigation has been undertaken. 

 The localities, Armidale and Uralla, are far away from 

 Rylstone from which locality the first described material 

 was obtained. The original data derived from that material 

 were published in our work "Research on the Eucalypts," 

 pp. 41 and 242. Eucalyptus species appear always to give 

 chemical products practically identical in composition and 

 general characters, no matter where found growing, of 

 course allowing for slight differences always found in natural 

 products of this nature. While one could readily distil 

 laevo-rotatory turpentine from the leaves of Eucalyptus 

 laevopinea, it would not be possible to do so from those of 

 either E. macrorhyncha or E. pilularis. Unfortunately 

 the yield of oil from naturally growing trees of E. laevopinea 

 is somewhat small (0*6 per cent.), and thus the commercial 

 production of turpentine from this source is not possible at 

 its present price, (although the yield of oil from E. dextro- 

 pinea is somewhat larger) but it perhaps might be feasible, 

 by a proper system of treatment and cultivation, to induce 

 this and similar species to secrete a greater abundance 

 of pinene, and so render its production profitable. If the 

 quantity of oil from the chief pinene bearing species was 

 as great as that from the most prolific phellandrene bearing 

 species, the maufacture of turpentine from the Eucalypts 

 could be made a profitable undertaking. From all the 

 evidence we have obtained there seems no doubt but that 

 E. laevopinea is a distinct species of Eucalyptus, and differs 

 in characters from any other. It may, perhaps, be con- 

 sidered as the "Stringy bark" of the Northern Highlands of 

 New South Wales, while E. macrorhyncha is the "Red 

 Stringybark" of Southern New South Wales, and as the 

 one species goes north and the other comes south, they 

 both meet in the neighbourhood of Rylstone, and are thus 

 found growing together in that locality. 



