AROMADENDRIN FROM EUCALYPTUS KINOS. 143 
Aromadendrin is almost tasteless, being perhaps slightly 
sweetish. It has no odour. 
Although the term aromadendric acid has been used for this 
substance, it should only be so considered in the sense already 
adopted for catechuic acid, as the acid qualities of the former are 
but slightly greater than are those of the latter, but it may 
eventually be proved to form one of a series of the tannic acids 
of the Eucalypts, and may probably be a starting point for those 
as yet but little investigated bodies. 
The ready isolation and determination of these two bodies 
eudesmin and aromadendrin, will assist in the elucidation of many 
problems connected with the large groupof Eucalyptus kinos known 
as the “Turbid Group,” and will enable it to be broken down on 
_ # purely scientific basis, a result long hoped for. Much work will 
require to be done before an authentic scheme can be laid down, 
but from our present knowledge, I look forward to an easy, 
accurate, and scientific method of arranging the members of this 
large group in their proper classes, and to eventually settle, 
chemically, the affinities existing between the Eucalypts, and thus 
help to bridge over the difficulties which have up to the present 
existed in reference to the members of this important genus. 
We require now a method whereby these bodies can be correctly 
Separated, both from each other and from the tannin of the kino, 
and until this mode of procedure is worked out, it is little use 
attempting a gravimetric determination of the original kinos. 
