Oil of Eucalyptus Numerosa "Type"

#### Eucalyptus Numerosa, "Type". For purely industrial purposes, various varieties of the above tree serve as raw material in the production of essential oils. Of the two best known oils, **Eucalyptus Numerosa **"Type" and **Eucalyptus**** ****Numerosa**, var. "A", we shall discuss only the former. The latter is almost identical to the oil of **Eucalyptus Dives "Type" **(see monograph). Oil of **Eucalyptus**** ****Numerosa**** ****"Type"**** **is steam distilled from the leaves of this Australian tree in the southeastern parts of the continent. The yield of oil is very good, but the oil itself is of no particular interest to perfumers or flavorists. Recently, the tree has been introduced in the Iswete and east Transvaal provinces of the Union of South Africa where the mining industry can absorb significant quantities of the oil for flotation (i.e. screening of the particles of powdered ore in a foaming mixture of light oil, water and fine air bubbles). Occasionally, the laevo-**Phellandrene **is isolated from this oil. This monoterpene finds some use in the "reconstruction" of essential oils (the "art" or rather *science** *of composing artificial oils from their known and identified constituents). Oil of **Eucalyptus**** ****Numerosa**** ****"Type"**** **is a colorless to pale yellow mobile liquid, possessing a fresh- peppery, spicy and minty odor with a bitterterpeney, rather unpleasant undertone. There is little or no dryout note. The oil is readily available, but it is rarely offered to the perfume industry. Local (Australian) factories produce various isolates from these oils, and these isolates are made available to the perfume industry. See also **Evoulimba**** ****Oil.**