32 



COMPANION TO TROPICAL READERS 



paper to show the exact position of the marks put on 

 the root. In three or four days compare the root 



with the copy, and observe that 

 the marks are farthest apart 

 towards the end of the root. In 

 recording this experiment make 

 drawings. 



Expt. 10. Development of Roots 

 from Radicle of Bean Seed. 

 Grow a number of bean seedlings, 

 germinating the seeds on damp 

 blotting paper, in moist sawdust, 

 and in the soil itself. Make six 

 drawings from observations, show- 

 ing the radicle from the time it 

 was dormant until it had de- 

 veloped into a root system two 

 months old. 



Expt. 11. Development of Roots 

 from Radicle of Corn Seed. 

 Fig. li. Experiment to Repeat Experiment 10, examin- 



detennine the Growing ., .-. e 



Point of a Root m g the growth of roots in corn 



seedlings instead. Observe that 

 the radicle dies back after a time, and numerous fibrous 

 roots take its place. 



ROOTS II 



(See Tropical Readers, Book I, pp. 75-78.) 



Expt. 12. Storage of Food in Roots. Keep carrots 

 and turnips growing until they produce flowers and 

 seeds; observe that the fleshy roots get much smaller. 



Expt. 13. Aerial or Adventitious Roots. Make 

 drawings of the aerial or adventitious roots, which 



