62 



GERMINATION OF SEEDS 



FIG. 17. Effect of air. 



cork one bottle tightly, but leave 

 the other open to the air. Place 

 both bottles in a warm place 

 where the heat conditions are 

 just right. Thus the seeds are 

 exactly alike in their conditions 

 for germination except the sup- 

 ply of air. After five days note 

 result. Continue observations 

 for a month. 



Conclusion. State the result 

 of your observations as to the 

 effect on germination of shutting 

 off the supply of air. 



46. THE AIR FACTOR 

 Object. Same as in Experiment Jj. 

 Method. Arrange six bottles containing damp sand in 

 varying amounts as , in Figure 18. Plant the same number 



3 4 



FIG. 18. Effect of air. 



of seeds in each bottle. Obviously the amount of air will 

 also vary, bottle (1) having most air. Place the bottles 

 where the heat supply will be alike for all. Cork tightly 



