THE ESSENTIAL OIL OF LEPTOSPERMUM FLAVESCENS. 171 



distinctive odour of terpene bodies, modified by small 

 amounts of alcoholic constituents and citral. 



Altogether 1,210 lbs. of leaves and terminal branchlets, 

 cut as for commercial distillation, were distilled, and gave 

 an average percentage yield of 0*8%, varying from 0*6% to 

 1*1%, according to time of year. 



The principal constituents of the oil so far determined 

 are : — 



(1) The dextro-rotatory bicyclic sesquiterpene alcohol 



eudesmol, both solid and so-called liquid forms. 

 (2 and 3) A mixture of dextro-rotatory sesquiterpenes, 

 the one occurring in greatest quantity being con- 

 sidered identical witli endesmene and the other 

 aromadeudrene. 



(4) ft Pinene. 



(5) a Pinene. 



(6) A liquid phenol, O14H20O4, giving an orange-red 



colouration with ferric chloride in alcoholic solu- 

 tion. 



(7) Citral. 



(8) Small amounts, not exceeding about 5%, of uniden- 



tified alcoholic bodies. 



Although the oil has never been distilled for commercial 

 purposes, the writer considers it possesses certain economic 

 possibilities, particularly in view of the large percentage 

 of sesquiterpenes present in those samples where the solid 

 eudesmol is practically absent. In its crude state it is of 

 value for soap perfumery, and it could likewise be used as 

 a substitute for cedarwood and similar oils. The sesqui- 

 terpenes themselves possess a fine cedarwood like odour, 

 and the author feels confident that, in the near future, 



