Heat 



these facts when they wish to separate substances which 

 have different boiling temperatures. They call this 

 distilling. You can do some distilling yourself and 

 separate a mixture of alcohol and water in the following 

 manner : 



Experiment 39. First, pour a little alcohol into a cup 

 a few drops is enough and touch a lighted match to it. 

 Will it burn? Now mix two teaspoonfuls of alcohol with 

 about half a cup of water and enough blueing to color the 

 mixture. Pour a few drops of this mixture into the cup 

 and try to light it. Will it burn ? 



Now pour this mixture into a flask. Pass the end of the 

 long bent glass rod (the " worm ") through a one-hole rubber 

 stopper that will fit the flask (Fig. 55). Put the flask on a 

 ring stand and, holding it steady, fasten the neck of the flask 

 with a clamp that is attached to the stand. Put the stopper 



FIG. 55. By distillation clear alcohol can be separated from the water and red 

 ink with which it was mixed. 



