WHAT USES DO WE MAKE OF WATER? 101 



vertical surface when the shells float in water. Have the top of 

 the cork come just level with the top of the shells. Liquid solder 

 may be used in place of paraffin. 



There is a film over the surface of water like stretched rubber. 

 The force of this film on water is great enough to hold the toy river 



barges together if they are brought end to end. The whole line 

 of them can be drawn along by holding one end of the stick in the 

 water just in front of one and pulling slowly. 



By pinning a small piece of soap to one end of the stick and 

 holding that in the water just back of the boat, you can apparently 

 repel a single boat. The soap weakens the surface film so that the 

 boat is pulled in the opposite direction by the film on the other 

 side of the boat. By using soap on one end to repel and the oppo- 

 site end to attract, you can make the boats maneuver in a manner 

 which appears mysterious to one who does not know the secret. 



2. POND LIFE AQUARIUM 



Procure several large glass jars. Have the club members divide 

 into several groups and visit different small pools and ponds on 

 a field trip. Bring back both plant and animal specimens. Ar- 

 range several aquariums and watch development in them. 



3. PREPARE A SCRAPBOOK ON WATER 



Classify the uses of water under : solid, liquid, and gaseous 

 form. Each member report upon the uses. A contest may be 

 arranged by dividing into three groups, the ice group, the water 

 group, and the steam group. An important use named wins a 

 point. 



REFERENCE READING 



Innes, W. T., The Modern Aquarium. Innes, 1931. 



Meister, M., Water and Air. Scribners, 1930. 



Thompson, J. M., Water Wonders Every Child Should Know. Grosset. 



Whitman, W. G., Household Physics. Wiley, 1932. 



