390 THE EXAMINATION OF EUCALYPTUS KINOS, 



fresh and unhandled, but, in a few weeks in small fragments, dulled 

 by their own disintegration. They powder readily between the 

 fingers, forming a fine powder which, in the majority of instances, 

 is of a buff colour. 



What this Kino research enables us to do. 



1 . To pronounce whether a kino is the product of a Eucalypt 

 belonging to the Renanthereaa or not. 



2. To confirm the affinity existing between stringybarks, 

 ironbarks, boxes, &c. It is a useful adjunct to, and check upon, 

 the cortical system, which is of course founded on external 

 characteristics merely. Eucalypts sometimes have variable bark, 

 but, as far as known, the kino of a particular species is constant 

 in character. 



3. To furnish a guide in points of difficulty which arise in 

 cases where diagnosis in the ordinary manner (e.g., by flowers and 

 fruits) breaks down. See leucoxylon, fasciculosa, infra. 



4. To name, in some instances (e.g., maculata, corymbosa), a 

 species from kino alone. 



5. To state whether a kino contains catechin from physical 

 characteristics alone. 



6. To pronounce what species are suitable for tincture- 

 making and what are unsuitable. Partly dependent on the fore- 

 going we are now in a position to indicate what species satisfy 

 the requirements of pharmacopoeias for kino, and what do not. 



It must be remembered that the systematic examination of 

 kinos is only just beginning. 



I desire to express my obligations to Mr. H. G. Smith, Labora- 

 tory Assistant, Technological Museum, for valuable assistance in 

 this research. 



Attention is drawn to the fact that the kinos of Eucalyptus 

 maculata and E. microcorys are anomalous; they differ from the 

 others in regard to colour, so much so, that they can be singled out 

 from all others (so far as is at present known) by this colour-test 



