100 HENRY G. SMITH. 



From the following tables which deal with the results of 

 the gelatinization of the tinctures, it is apparent that some 

 species of Eucalyptus give kinos of great excellence for 

 tincture making. They do not gelatinize even after many 

 years, and the addition of glycerol is not needed. The 

 probable gelatinization of all kinos can also readily be 

 determined by simple tests. The kinos here listed were 

 chosen as being representative of the whole 100 species of 

 Eucalyptus examined. The remainder, not here enumerated, 

 gave the chemical reactions agreeing with these, but so 

 far as this investigation has gone no others were detected 

 giving indications of non-gelatinizable kinos. The list of 

 these is thus restricted to the four following species : — 



1. " Tallowwood," Eucalyptus mierocorys, Eastern 



Australia. 



2. "Bed Gum," Eucalyptus calophylla, Western 



Australia. 



3. "Mountain Blood wood," Eucalyptus eximia, Blue 



Mountains, N. S. Wales. 



4. "Spotted Gum," Eucalyptus maculata, Eastern 



Australia. 



The kinos of E. eximia and E. maculata (being closely 

 related chemically) give precipitates when diluted with 

 water, which peculiarity might be an objection to their use 

 pharmaceutically. The tincture of E. calophylla gives only 

 a slight turbidity when diluted with water, while the tinc- 

 ture of E. mierocorys remains perfectly clear and trans- 

 parent on the addition of water. 



There seems but little to choose between the kinos of 

 E. mierocorys and E. calophylla for tincture making. 

 The latter, however, can be readily obtained in any quantity. 

 They do not undergo change when kept in the dry state. 

 There seems no reason, apparently, why the kinos of some 

 Eucalyptus species should not eventually replace, for 



