262 R. T. BAKER AND H. G. SMITH. 
own preparations of that species, as our work corresponds in 
almost every particular with his observations. 
The stomata of #. punctata are much smaller than those of 
E. globulus, and require a higher power objective to discern them. 
The transverse section of the leaf requires no further remarks 
than are given in the explanation of the plate. 
Habitat.—The species has a much more extensive range than 
is generally supposed. It extends along the whole coast district 
from Queensland to near the Victorian border, or at least to 
Cambewarra and over the Dividing Range, very possibly well 
into the level country, having been collected by one of us beyond 
Rylstone. Of course for a species to occur over such an area 
as this, one expects to find it designated by several local names, 
but on the whole “grey gum” seems to be its general vernacular. 
III.—Tue Cuemistry or THE EssentiIAL OIL. 
(a) General remarks.—We submit this research on the oil of 
E. punctata as the first of several good oils obtainable from com- 
mon species of Eucalypts, growing plentifully in this colony, and 
which give an oil comparable with that obtained from Z. globulus. 
We wish it to be understood at once, that we have no intention 
to disparage in any way the oil from Z. globulus, and we admit 
its excellence ; but this species does not occur to any extent in 
this colony, so that as far as we are concerned, it is not for our 
consideration, except for comparison. But the impression that 
E. globulus, is the only Eucalypt from which a first class oil can 
be obtained is not correct. 
This investigation deals more fully with the products of several 
distillations than will perhaps be necessary in future papers, but 
it enables us to say at once, that the “grey gum ” of the Sydney 
district, #. pwnctata, gives an oil every way equal to that obtained 
from the leaves of any Eucalypt, the composition of whose oil has 
been determined, and we think we shall be able to show that it is 
quite as rich in eucalyptol as that obtained from Z. globulus. 
