38 DISSERTATION ON THE 



EXPERIMENT XXV. 



A part of the alcoholic infusion of the leaves 

 had recourse to in experiment the twenty-se- 

 cond, was evaporated to dryness. A yellow 

 resin-like thick varnish covered the bottom of 

 the capsule, and was of an extremely bitter 

 taste. Repeated affusions of warm water se- 

 parated a part of it, leaving the remainder of 

 a deep transparent red colour. These watery 

 portions, when added together, were of a yel- 

 low^ colour; on standing they soon became 

 opaque, and deposited the resin which, by 

 means of the heat, they had taken up. 



EXPERIMENT XXVI. 



To the leaves that were used in experiment 

 the twenty-first, a quantity of very pure alco- 

 hol was added, and the mass distilled to dry- 

 ness : upon the infusion of litmus being pour- 

 ed upon the product of the distillation, a red 

 colour was formed; a solution of the sulphate 



