DETECTION OF FOREIGN COLORING MATTER. 



27 



TABLE 1. Coloring matter of fruits. 



'Acidity of the juice. 



TABLE 2. Coloring matter of fruits. 



It will be seen from these two tables that amyl alcohol, as a rule, 

 extracts fruit coloring matter from acid solution, while ether does 

 not. Neither amyl alcohol nor ether extracted any color from alka- 

 line solution of the fruit juices. 



