GROWTH OF SEEDLINGS 73 



Method. Place the seeds in the soil in various positions 

 or lay them upon the blotters and wet them. When they 

 begin to germinate, note how they split the shell. What 

 special organs are developed for splitting the shell. Does 



FIG. 21. Germinating squash seeds. 



the shell come up with the plantlet? If it does come up, 

 how account for it? 



Conclusion. State step by step how the squash plant 

 escapes from its shell. 



59. GROWTH 



Object. To learn how the peaplant comes above ground- 

 Apparatus. Peas, flowerpots of soil. 



Method. Plant peas and observe their way of coming 

 up. How do they differ from beans? squash? Why 

 do they not need a peg to help split open their shells ? By 

 what structure do they break ground ? Of what advantage 

 is the arch to the pea plant ? Compare the size of the first 

 bud with that of beans and squash. 



Conclusion. State how peas come up, telling what part 

 breaks through the ground. 



