THE foregoing work, which has, inter alia, occupied our attention for a period of thirty years, and which embraces the investigation of individual species spreading over such a very wide area, serves to demonstrate the great economic importance of this remarkable Australian Genus, in other directions than for timber. Although the Industrial Applications of Eucalyptus Oils are now somewhat extensive, yet it must not be considered for a moment that these known results exhaust their economic possibilities, as, without doubt, in the coming years, new openings will be found for their employment, and new constituents be discovered.