EUCALYPTUS TREES. 125 
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 
Cinchone, if harsh, cutting winds are kept from the 
latter. Butas yet Iam 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 alsoon many branches of 
applied industry. The causes why the Iron- bark 
trees of our auriferous quartz ridges differ so material- 
ly from the conspecific tree of alluvial flats can only 
be explained geologically. So it is with the narrow- 
Jeaved Eucalyptus amygdalina on open stony decliv- 
ities as compared with the broad-leaved Eucalyptus 
fissilis, 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 if is placed on a wrong spot for the best raw 
material. 
