608 ON KINOS AS AN AID IN THE DIAGNOSIS OF EUCALYPTS, 



system. Often Kino cannot be found on a certain tree; on the 

 other hand, the uncertain period of flowering of many species 

 often precludes any examination of anthers. And when anthers 

 are obtained, only those who have frequently examined the 

 flowers of this genus know how difficult and uncertain it is to 

 assign the species yielding them to its proper anthereal group. 

 When once the Kino is obtained, how^ever, an ordinary child of 

 seven would be able accurately to place it in its proper group. 



The specimens of Kino now, and to be, described are the 

 property of the Committee of Management of the Technological 

 Museum, in which collection will be found many specimens 

 collected by Mr. Bauerlen on behalf of the Committee, over 

 forty specimens collected by the author, together with a few 

 of miscellaneous origin, the whole forming a series probably 

 not to be equalled anywhere. 



It will be seen from the descriptions now given how similar 

 are all the Kinos of this Ruby group. Time seems to alter them 

 all similarly ; and the author believes that Kinos of all these 

 species, provided the same period has elapsed since exudation, 

 and they have been exposed to similar climatic influences, tend 

 to have precisely the same appearance and composition. He has 

 given a few notes on the appearance of those of different species 

 partly with a view to bring out the relationship between physical 

 appearance and chemical composition, and partly with the view 

 to furnish the fullest particulars in regard to these little-known 

 substances. It must be borne in mind that the dates given are 

 either those of collection or of receipt, and not of exudation, so 

 that they do not, in many cases, give a precise idea of their 

 comparative ages. But appearance and composition of the Kinos 

 give, he believes, an infallible clue to their ages. With not much 

 diffidence he hazards the belief that when a series of Kinos just 

 exuded shall have been collected, and thus their ages known at 

 the time of different experiments, it will be found that the per- 

 centages of tannic acid, for instance, will be in inverse ratio to 

 their ages. 



