PINENES OF THE OILS OF THE GENUS EUCALYPTUS. 207 



It may be well for the purpose of identification to retain specific 

 names for these Eucalyptus pinenes, and as Eucalyptene stands for 

 the dextropinene, I suggest the name Eudesmene for the lsevo- 

 rotatory pinene. 



The discovery of Eucalyptus oils consisting principally of 

 pinenes prevents the determination of sophistication of Eucalyptus 

 oils with commercial oil of turpentine ; if its presence was proved 

 there is no reason why it should not have been obtained directly 

 from Eucalyptus leaves, and need not have been the effect of 

 adulteration. The necessity of determining the constituents of 

 Eucalyptus oils to be used medicinally is thus again emphasized. 



I wish to express my thanks to my colleague Mr. R. T. Baker, 

 for botanical assistance in the preparation of this paper. 



