88 PROCEEDINGS OF SECTION B. 



copious violet -coloured precipitate is deposited, the solution in the 

 upper part of the tube remaining grey and turbid. They give in 

 aqueous solutions (1 gram kino per litre) copious precipitates with all 

 the reagents mentioned above, and for this reason have been chosen 

 to represent Class I. in the present arrangement. The reaction \vith 

 cupric sulphate and ammonia in excess is particularly well marked, 

 and the precipitate abundant. This class is well represented on the 

 eastern side of Australia, the species largely growing on the ranges, 

 and also well distributed in Tasmania ; but in the western and central 

 portions of the continent the eucalypts may be expected to yield 

 kinos which fall more largely into the other classes. Certainly Class I. 

 will not be well represented there. As this paper principally deals 

 ■with the kinos of species from Eastern Australia, Class I. necessarily 

 includes a considerable number of species. Those so far determined 

 are enumerated in the following list : — 



E. amygdalina E. radiata E. umbra E. fastigata 



E. Andrewsi E. Risdoni E. Wilkinson- E. haemastoma 



E. capitellata E. vitrea iana E. Luehman- 



E. Delegatensis E. dextropinea E. campanulata niana 



E. dives E. eugenioides E. coriaceae E. obtusiflora 



E. linearis E. fraxinoides E. oreades E. regnan-S 



E. pilularis E. leevopinea E. phlebophyllaE. santalifolia 



E. piperita E. macror- . E. Sieberiana E. stellulata 



E. Planchon- rhyncha E. virgata E. stricta 



iana E. obliqua 



Class II. 



A large number of eucalyptus kinos give a green colouration with 

 ferric chloride, but other reactions show many of these to consist of a 

 mixture of constituents representative of other classes. They are 

 thus more or less intermediate in character. Class II. is best represented 

 by the exudations of E. melliodora and E. longifolia, as these are readily 

 soluble in cold water and give a bright green colouration at once with 

 ferric chloride (^ gram kino per litre), slowly changing to olive-brown 

 towards the bottom of the tube, and after a time there is formed a 

 ver}' small amount of a dark olive-green flocculent precipitate. With 

 bromine water (1 gram kino per litre) a somewhat copious yellowish 

 precipitate is obtained but none with iodine, and there is no precipitate 

 (or only minute traces) with cupric sulphate and ammonia in excess. 

 Potassium dichromate does not give a precipitate even on long standing, 

 nor does lime water, or only in traces. The acetates of uranium and 

 zinc give only slight precipitates after standing for a considerable 

 time. These tests are all distinctive from those of the first class, 

 with the exception of that with bromine water. The Idnos of this 

 class are all practically soluble in alcohol, but most of them give turbid 



