r 



Ml 



r 



23 



3. Eucalyptus Leucoxijlon, Ferd. Mueller — the Tronbark-trec 

 — is found in South Australia, Victoria, and New South Wales. 

 In Victoria it occurs on barren ranges, and is frequent in the 

 vicinity of gold fields; its presence is regarded by the miner as 

 an indication of an auriferous region. 



The foliage upon which the experiments were conduct<;d, had, 

 in their transport, suffered fermentation, and this to a certaiu 

 extent must have acted disadvantageously upon the yield of oil ; 

 consequently the amount given can only be regarded as approxi- 

 mate. The quantity obtained from 100 lb. of the leaves was 

 16.88 fluid ounces. The oil is a thin, limpid, very pale yellow 

 fluid, in taste and smell closely resembling that from J'J. ob'onu. 

 Its specific gravity is 0.923 : it boils at 310*^, the mercury sub- 

 sequently rising to 352*^. It ignites with difficulty in open ves- 

 sels ; in the lamp it burns well, with a dense white luminous 

 flame. It is a good solvent for a variety of resinous bodies. 



4. EucaJf/ptus gonioaih/x, Ycrd. Mueller — one of the White 

 Gumtrecs; in some districts it is called the Spotted Gumtree. 

 It is found in Victoria and New South Wales. A gigantic tree. 

 Although the leaves of this species are not so rich in essential 

 oil as those of E. ami/gdaliud, the yield is nevertheless very con- 

 siderable : 100 lbs. of fresh leaves gave 16 fluid ounces. 



This oil is of a very pale yellow color, possessed of a pungent 

 penetrating odor, somewhat disagreeable : its taste is diffusible, 

 strung, and exceedingly unpleasant. It has a specific gravity of 

 0.918 ; it boils at 306°, the mercury immediately rising to 346^. 

 This oil is admirably adapted for illuminating purposes; it pro- 

 duces a brilliant white flame, superior in intensity and colo." to- 

 that from the best American kerosene. It is a good solvent for 

 a variety of resinous bodies. 



5. Eucali/ptHs globulus, Labillardiere — Blue Gumtree — occurs 

 in Victoria and Tasmania. In deep declivities this tree grows 

 to colossal size ; near the coast, where it is found occupying open 

 spaces, it is usually of diminutive growth. The amount of oil 

 obtained from 100 lbs. of freshly gathered leaves was 12.50 fluid 

 ounces. 



The oil is a thin limpid fluid of a very pale yellow tint ; its 

 ixlor is not unlike cajuput (to which indeed all the Eucalyptine 

 oils have more or less resemblance) ; the camphor-like smell 



