508 



Our Surroundings 



The following table gives a 

 corn seeds. 



Bean 

 Has two cotyledons containing 



stored food 

 No endosperm 

 Testa, hilum and micropyle 

 Epicotyl, large 

 Fruit, a pod containing several 



seeds 



comparison of the bean and the 



Corn 

 Has one cotyledon containing no 



stored food 



Endosperm (food for the tiny plant) 

 Testa; hilum and micropyle not 



visible 



Epicotyl, smaller than in bean 

 Fruit, a grain having but one seed 



Experiments with Seeds. 



To Show the Necessity of Oxygen in the Air for Germi- 

 nation. Use two fruit jars, each containing a small amount of 



^^*^^ *" r */f- - *u** -^_- ^* ^^^^^ 



EXPERIMENT TO SHOW THE NECESSITY OF OXYGEN FOR GERMINATION 



earth. In one jar place a small quantity of pea seeds that have 

 been well soaked in water. Close the jar tightly. In the other 

 jar place the same quantity of soaked seeds and leave the jar 

 uncovered. If the jars are kept for several days in a warm 

 atmosphere it will be noticed that the seeds in the open jar germi- 

 nate quickly and grow rapidly into healthy, strong plants, while 

 the seeds in the covered jar fail to continue to develop after a 

 short time. By placing a lighted candle in the covered jar it will be 



