ON EUCALYPTUS KINOS. 03 



On the other hand the "New Holland kino " mentioned 

 by Dr. Thomson 1 as being procured by wounding the 

 Eucalyptus resinifera, gave a brown chocolate powder on 

 which cold water acted but slowly, but boiling water formed 

 a deep cherry-red solution which threw down a brick 

 coloured precipitate on cooling. The solution was coloured 

 deep green by sesquichloride of iron. From these reactions 

 it is certain that that sample of kino was not obtained from 

 any species belonging to the "Ironbarks," or the "Stringy- 

 barks," or the "Peppermints." The above statements 

 denote clearly that no care was taken to distinguish 

 between products of separate species. 



At the International Exhibition of 1862 a collection of 

 vegetable products was exhibited from Tasmania, and in a 

 series of notes on these by Mr. W. Archer, f.l.s., published 

 in the Technologist, appears the following: — "This gum, 

 which seems to have similar properties to those of the 

 East Indian kino, exudes from woods of all the Tasmanian 

 species of Eucalyptus." That these exudations were at 

 that time, collected without discrimination, is indicated by 

 the above statements. 



The evidence which will be submitted later will illustrate 

 how unsatisfactory these Eucalyptus kinos must be when 

 so collected, and it also offers an explanation for the non- 

 agreement in the experiences of various writers, who have 

 described their successes or otherwise with particular 

 methods suggested at various times for the preparation of 

 tincture of kino. 



In the journals devoted to pharmacy much information 

 may be found dealing with this subject. It has been sup- 

 posed that glycerol had the desired effect of preventing 

 gelatinization, and its addition is of course official, but R. 



1 Thomson, Mat. Med. p. 678 (1843). 



