EXERCISE 8. TO SHOW THAT PLANTS TAKE UP 

 MOISTURE FROM THE SOIL AND GIVE IT OFF 

 THROUGH THEIR LEAVES 



Equipment: Small 



Fig. 6.— When this Plant 

 is Placed in a Sunny 

 Window, Drops of 

 Water soon Collect on 

 the Inside of the Glass 

 Can. 



potted plant; wide-mouthed jar; 

 piece of cardboard, 6X6 inches; 

 wax. 



Method : Use a plant which is 

 at least three or four inches high 

 and growing in a flower pot or to- 

 mato can. Cut a slit in the card- 

 board from the middle of one side 

 to the center and place it around 

 the plant. Seal up the slit in the 

 cardboard with any soft wax. In 

 place of the cardboard, the surface 

 of the soil may be sealed over 

 with melted paraffin or with model- 

 ing clay. The object of the seal is 

 to prevent the water from evapor- 

 ating directly from the surface of 

 the soil and condensing on the 

 inside of the jar. Now invert the 

 glass jar over the plant and place 

 in a sunny window. How do the 

 drops of water get into the glass 

 jar? 



Discussion: 

 16 



Plants are con- 



