EUCALYPTUS TBEES. 161 



formance of this investigation was frustrated. I 

 think that I have proved the hardiness or adaptabil- 

 ity of these important plants for the warm Palm val- 

 leys of East Gipps Land, as many indigenous plants 

 from that genial spot are quite as much, if not more, 

 susceptible to the night -frosts of our city than the 

 Cinchonse, if harsh, cutting winds are kept from the 

 latter. But as yet I am unacquainted with the likely 

 results of remunerative Cinchona cultivation within 

 the boundaries of this colony, as far as such depends 

 on the constituents of the soil. That inquiries of this 

 kind are not mere chimeras may be conceded after 

 an explanation of this kind for the benefit of future 

 technology. Geology, one of the brightest satellites 

 which rotate around the sun of universal science, con- 

 tinues to send its lustre into the darkness which yet 

 involves so many of the great operations in tellurian 

 nature. Further insight into the relation of this dis- 

 cipline of science to vegetable physiology is certain 

 to shed abundance of light also on many branches of 

 applied industry. The causes why the Iron-bark 

 trees of our auriferous quartz ridges differ so material- 

 ly from the conspeciflc tree of alluvial flats can only 

 be explained geologically. So it is with the narrow- 

 leaved Eucalyptus amygdalina on open stony decliv- 

 ities as compared with the broad-leaved Eucalyptus 

 flssilis, which in such gigantic dimensions towers up 

 from our deep forest valleys. But all this has an im- 

 portant bearing on technological exertions in manifold 

 directions. The timber chosen by the artisan from a 

 wrong locality may impair the soundness of a whole 

 building ; or a factory may prove not lucrative simply 

 because it is placed on a wrong spot for the best raw 

 material. 



