EXPERIMENT 31. DISTILLATION 



Connect a flask of water, colored with a few drops of 

 iodine or red ink, with a condenser, as shown in Figure 30. 

 Heat the colored water until a small amount of its con- 

 densed vapor has been collected in the beaker B. What 

 is the appearance of the condensed vapor ? Test this con- 

 densed vapor or distilled water for organic matter as in 

 Experiment 29. The steam from A passes through a nar- 

 row tube within C. In order that the steam may be cooled 

 and condensed, cold water is sent through C, entering at D 

 and escaping at E. 



FIG. 30. In order that the steam may be quickly condensed, cold water is sent 

 through the tube C. 



EXPERIMENT 32. TO TEST THE PURITY OF YOUR HOME 

 DRINKING WATER 



For this experiment the pupil must bring a pint of 

 water from her home. 



