28 DISSERTATION ON THE 



of alcohol ; the muriate of tin formed a trifling 

 precipitate. 



In the following experiments, by means of 

 the cold infusions, which were next instituted, 

 one ounce of the flowers, the same quantity 

 of the leaves, and of the roots, bruised, was 

 put in separate glass vessels, and a pint of dis- 

 tilled water added to each. They were suf- 

 fered to infuse for twenty-four hours, and then 

 filtered through paper. The infusion of the 

 root possessed the darkest colour, that of the 

 leaves was considerably lighter, while that of 

 the flowers was still lighter. In all a bitterish, 

 taste was perceptible. 



EXPERIMENT XI. 



An infusion of the flowers, prepared in the 

 manner just mentioned, produced the follow- 

 ing appearances. With re-agents an infusion 

 of litmus formed a red colour; a solution of 

 the sulphate of iron formed a green precipi- 

 tate ; an infusion of galls induced no precipi- 



