461 



From this table the high flotation efficiency of the oil of this species is 

 evident, and is superior to that of other Eucalyptus oils, although the product of 

 E. phellandra is but little inferior for the purpose. 



The following tabulated results are from the oil of E. phellandra, the 



' Narrow leaf Peppermint," distilled at Mongarlowe, New South Wales, by 



Mr. F. Webb. Ordinary material was used, and the distillation canied out by 



the usual square tank with direct firing. The flotation efficiency results were 



determined by Mr. H. Lavers, the standard being that of E. dives taken as 100. 



EUCALYPTUS PHELLANDRA. 



The cineol diminished in amount as the time of distillation proceeded, but 

 phellandrene was present in fair amount in all the samples. 



(e) For Perfumery Purposes. Another important direction in which 

 certain Eucalyptus oils are now employed is in the perfumery industry, for 

 scenting soaps, and for similar purposes. 



One of the most frequently occurring constituents in Eucalyptus oils is 

 the acetic acid ester of geraniol, usually associated with the free alcohol. Like 

 all other constituents occurring in Eucalyptus oils, geranyl-acetate reaches a 

 maximum in one species, in this case E. Macarthuri, where it is found 

 in both the leaves and the bark. This Eucalypt probably supplies the only 

 instance on record .where geraniol occurs in the bark of a big tree ir sufficient 

 quantity to permit of its extraction on a commercial scale, and is another 

 illustration of the diverse nature of the oil products obtainable from the genus. 



This diversity in constitution is also illustrated with the product of 

 E. citriodora, a species which yields an oil consisting almost entirely of the 

 aldehyde citronellal. This oil is in considerable request for perfumery purposes 

 and is employed for the production of the corresponding alcohol citronellol, 

 which substance has even a more pronounced rose odour than has geraniol. 



The aldehyde citral also occurs in the oils of a few species, most abundantly 

 in that of E. Staigeriana. 



Other odoriferous constituents are the ketone piperitone, a commonly 

 occurring substance in the oils of the ' Peppermints " ; and the aldehyde 

 aromadendral which is present in those of the typical " Boxes" and associated 

 " Gums." The former constituent is found in quantity in the oil of E. dives and 

 other species, and the latter in those of E. salubris, E. hemiphloia, E. rostrata 

 and oils of that class. 



The second and third hour oils of E. Australiana should also be of value 

 for perfumery purposes, as they contain terpineol and geraniol as well as 

 esters. Terpineol like geraniol is a common constituent in Eucalyptus oils. 



