NEW AKOMATIC ALDEHYDE OCCUKKING IN EUCALYPTUS OILS. 295 



ing alcohol would then be aromadendrol. The acid obtained by 

 oxidising the aldehyde group with potassium bichromate is thus 

 aromadendric acid. It would have been preferable if the name 

 eucalyptal could have been adopted, but there are already two 

 substances that have been given the name eucalyptic acid, namely: 

 that of L. Rummel for a substance obtained from the wood of E. 

 globulus (art. E. globulus, Eucalyptographia), and that of H. 

 Weber for one from the leaves of E. globulus (Wittstein's Organic 

 constituents, p. 80). Utilisation of the most appropriate nomen- 

 clature is thus barred. 



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

 F.L.s., for botanical help in the preparation of this paper, and also 

 for the material, which is thus of undoubted authenticity. 



