ROOTS 



with the plate of glass and bind with cord. Keep the blotter 

 damp and hold it in the original position until the roots 



are a half inch long. 

 Then turn the plate 

 over on the side so 

 that the roots point 

 in a horizontal direc- 

 tion. Observe them 

 from time to time. 

 Do the root tips show 

 any response to the 

 change of position ? 

 How? (Fig. 26.) 



After a day or two 

 turn the apparatus 

 Continue turning the plate as the 



FIG. 26. 



again on the next side, 

 roots continue to grow. 



Conclusion. In what direction 

 you give a probable reason ? 



do roots grow? Can 



77. ROOTS 

 Object. Same as in Experiment 76. 



Apparatus. Bell jar, shallow pan, cork float, pins, seedlings, 

 and water. 



Method. Fasten two or three seedlings of equal size by 

 pins as in Figure 27, so that Bell-jar, 



the sprouts point upward. 

 After a few hours note the 

 change of direction of growth. 



Note. The bell jar is used 

 to keep the seedlings in a moist 

 atmosphere. FIG. 27. 



...Seedlings 



....Corn. 



.water 

 Tray. 



