EUCALYPTUS. 251 



attention to this point. The study of the eucalypts may be 

 difficult, by reason of the great number of species, but 

 commercially it is of importance ; the value of the oil yielded by 

 each species being different. 



E. cneorifolia, D.C. This species is not of frequent occurrence 

 in Australia, and is not as yet propagated to any extent there. It 

 is found almost exclusively on Kangaroo Island, along the banks 

 of the Cygnet Eiver. It is a small scrub of about twelve feet in 

 height and much branched at the base. It is locally known by 

 the name of " narrow-leaved eucalyptus." This tree is very 

 nearly allied to E. oleosa, of which it was originally regarded as a 

 sub-species. Owing to the increased demand for this oil, which is 

 of excellent quality and wonderfully rich in eucalyptol, works 

 have been established on the island for its extraction. The sp. gr. 

 of the oil is 0'923 at 15"5 C, 72 per cent, of it boiling between 

 170° and 180^ C* In its higher boiling fraction, viz., from about 

 200° to 220^, there is a product having an odour reminding of 

 dill and caraway and somewhat of lemon ; this probably contains 

 citmi'ii aldehyde and citral. 



E. dumosa forms, with E. gracilis and other species, the 

 "Mallee country" of Xorth Western Victoria, Southern Xew 

 South "Wales, and South Australia. Its oil has a strong camphor- 

 aceous odour. Sp. gr. 0'912. 



E. gracilis, Mueller, inhabits the same districts as E. dumosa, 

 also Queensland. It yields rather a lower percentage of oil than any 

 of the other mallees. Maiden says (Useful ]N'ative Plants of 

 Australia), that 1000 lbs. of fresh tw^igs yielded 54|- ozs. of oil, but 

 he does not mention the odour of this oil. 



E. incrassata, Labil. 1000 lbs. of fresh branches, about half 

 of which weight consisted of leaves, yielded 140 ozs. of oil. iS"o 

 remark is made by Maiden as to the odour and other properties. 



E. uncinata Turez. According to Baron Mueller 1000 lbs. of 

 branches with about 500 lbs. of leaves, yielded 69 ozs. of oil, but no 

 remark is made as to odour and other properties. The tree 

 inhabits West and South Australia, Victoria and New South 

 Wales. 



* Schimmel, Bericht., April, 1891. 



