22 HENRY G. SMITH. 



to exist in the oils. The results, so far obtained, strongly 

 support the idea of evolution for the whole genus, as has 

 already been advanced by Mr. Baker and myself. 1 



It has been possible to undertake a systematic investi- 

 gation of a considerable number. of these exudations or 

 kinos, because the Technological Museum is now in 

 possession of, perhaps, the most extensive collection of these 

 kinos, true to name, ever got together. These have been 

 collected very largely by the Museum Botanical Collector 

 Mr. W. Bauerlen, a few have been obtained from corres- 

 pondents, and the remainder have been collected by my 

 colleague Mr. R. T. Baker (to whom I am indebted for 

 botanical assistance), by Mr. J. H. Maiden, and by myself. 

 It is not proposed to embody the general results in these 

 papers, but only those having a scientific or economic 

 bearing, the study of which will help considerably towards 

 increasing our knowledge of these very interesting sub- 

 stances, so peculiar to Australia. 



If the statements given in the Encyclopaedia Britannica 

 (ninth edition), in reference to Eucalyptus kinos, be taken 

 as a fair sample of the general knowledge respecting these 

 exudations, it is seen how meagre and unsatisfactory this 

 information is. The following quotation will illustrate 

 this: — "according to Wiesner 2 of Vienna, Australian kino 

 contains a little catechin (a statement doubted by Fluckiger) 

 and pyrocatechin, no pectinous matter but a gum nearly 

 allied to that of Acacia." I shall eventually show that 

 gum does not appear to be present in any Eucalyptus kino. 



In a series of papers by Mr. J. H. Maiden, f.l.s., pub- 

 lished in the Proceedings of the Linnean Society of New 



1 Research on the Eucalypts especially in regard to their essential oils, 

 p. 16. 



2 Zeitschr. d, allg. Oest. Apotheker, Vereines, abst. Pharm. Journ. [3] 

 2, 102. 



