OILS. 275 
“Manna Gum.” ‘Grey Gum.” ‘“ White Gum.” (For the other 
numerous vernacular names and botanical synonyms of this Eucalypt, see 
“ Timbers.’’) 
The essential oil is of a pale yellowish-green colour, of dis- 
agreeable, but not penetrating smell; of 0.921 sp. gr.; it boils at 
159° to 182°. (Wittstein and Mueller.) A tree grown at St. 
Kilda, Melbourne, yielded Mr. Bosisto half-an-ounce of oil per 
10olbs. of leaves. The sp. gr. of the essential oil of 2. dealbata 
(viminalis) is given by Mr. Staiger at .871 at 72° F. Its odour is 
described as being allied to citronelle, though differing from it, 
and it is suggested as a soap-perfume. Messrs. Schimmel & 
Co. (Pharm. Fourn., April, 1888) speak of the oil of £. dealbata 
as possessing, in common with those of £. Baileyana, E. micro- 
corys, and £. maculata, var. citriodora, “a magnificent, melissa- 
like odour, which, especially in the oil of Z. dealbata, is manifest 
in a surprisingly fine and rich bouquet. It is thought they will 
prove to possess extraordinary practical value.”’ 
Bosisto (Zrans. R.S., Victoria, vol. vi., 1861-4) states that 
the oil of Z. fabrorum (viminalis) is transparent, reddish-yellow, 
milder in odour than that from £. glodulus ; in flavour, resembling 
caraways and smoke-essence combined, and distinctly bitter to the 
taste. Yield: 8ozs., from roolbs. of fresh leaves. 
Tasmania, South Australia, through Victoria to New South 
Wales. 
30. Melaleuca decussata, #.2r., (Syn. AZ. parviflora, Reichb.; 
M. oligantha, F.v.M.; M. tetragona, Otto.); N.O., Myrtacez, 
BF. iii., 133. 
The essential oil is of oily consistence and amber colour, sp. 
gt. 0°938; it boils at 185°-209°, and resembles the oil from JZ 
Wilsontt. (Wittstein.) oolbs. of the leaves and branchlets 
yielded about 602. of essential oil. (Mueller.) 
Victoria and South Australia. 
31. Melaleuca ericifolia, Smth, (Syn. AZ. nodosa, Sieb. non Smith ; 
M. Gunniana, Schau; M. heliophila, F.v.M.); N.O. 
Myrtacez, B.FI., iii., 159. 
