EXERCISE No. 61 

 OXYGEN AND GERMINATION 



Object: To learn whether oxygen is necessary for germi- 

 nation. 



Material: Beans or peas, two one-pint Mason jars, and 

 saw dust. 



Method: Soak the seeds 12 to 24 hours. Place a layer 

 of saw-dust an inch deep in each jar and cover with a piece 

 of blotting paper. In one jar place a few seeds and cover 

 loosely. Fill the other jar full and cover tightly so that 

 there will then be but little ah- for each seed. Set both jars 

 in a warm place for several days. 



Conclusion: Explain the difference in the growth of the 

 two lots of seed. Under what field conditions would seeds 

 get too little air? 



EXERCISE No. 62 



EFFECT OF LIGHT UPON GERMINATION 

 AND PLANT GROWTH 



Object: To learn the effect of light upon germination 

 and growth of plants. 



Material: Soaked grains of corn, germinated grains "of 

 corn with shoots two inches long, four flower pots, and soil. 



Method: Plant the corn that has been soaked over two 

 nights in two of the pots and transplant one or more seed- 



