ESSENTIAL OILS FROM LEPTOSPERMUM LIVERSIDGEI. 83 
(a) One yielding an oil to the extent of 0°25 to 0°37%, as 
originally described, containing about 35 — 507 citral 
(no citronellal). 
(b) A form yielding an oil, about 0°557%, containing 70 - 
80% citronellal (no citral). 
(c) A form yielding about 0°6-0°8/ of oil containing 
about 70-80% citral (no citronellal ?). 
As shown in appended table of experimental results, 
material has been obtained from Frazer Island, Queensland, 
which yielded essential oils in fair agreement with the 
composition of the oil as first described, whilst others col- 
lected at about the same time of the year, and in similar 
localities, yielded oils of different composition, as described 
above, see (b). 
As the material in each case was determined botanically 
to be the species Liversidgei, and as it is a shrub that is 
generally considered to be comparatively easy of recog- 
nition, the above mentioned conclusion is practically the © 
only one that could be arrived at at the present time. The 
author would have preferred to have extended these obser- 
vations over a further period of years, supplementing same 
with field inspections, but thought it advisable to record 
the results obtained to date in view of their possible 
economic influence, for the following reasons, viz:— 
(1) The distillation of the oil from Leptospermum Liver- 
sidgei (a) as originally described, cannot be considered an 
economic proposition for the preparation of citral, in view 
of its low percentage yield, 0°25/, and low content of 
aldehyde, only 35-46%. This probably accounts for its 
neglect in the past. 
(2) The type (c) yielding about three times as much oil 
as (a), of high citral content, 70—75%, which would most 
probably be botanically diagnosed as (a) and thereby passed 
over, would most likely pay to distil. Good areas are 
