[ 254 1 



(landing 24 hours, was the colour of the fyrup at 

 all changed, except by its fimple dilution. 



Experiment II. 



A portion of the fame diflilled water, un im- 

 pregnated with fixed air, was mixed with the 

 fyrup in the fame proportion : not the leaft differ- 

 ence in colour could be perceived betwixt this 

 and the above mentioned mixture. 



Experiment III. 



One drop of oil of vitriol being mixed with a 

 pint of the fame diflilled water, an ounce of this 

 water was mixed with a tea-fpoonful of the iyrup. 

 This mixture was very diftinguifhable in colour 

 from the two former, having a purplifh caft, which 

 the others wanted. 



Experiment IV. 



The diflilled water impregnated with fb fmall a 

 quantity of vitriolic acid having a more agreeable 

 tafte than when alone, and yet manifefting the 

 prefence of an acid by means of the fyrup of vio- 

 lets ; I fubje£ted it to fome other tefts of acidity. 

 It formed curds when agitated with foap, lathered 

 with difficulty, and very imperfectly ; but not the 

 leaft ebullition could be difcovered upon dropping in 

 fpirit of fal ammoniac, or folution of fait of tartar, 

 though I had taken care to render the latter free 

 from caufticity by impregnating it with fixed air. 



Ex- 

 5 



