OBSERVATIONAL LESSON XI 



PART I A BULB (continued, second investigation) 

 PREPARATIONS FOR WORK 



The growing hyacinth will be needed. 



DIRECTIONS TO 

 THE PUPIL 



( 1 ) Record the 

 growth of the 

 hyacinth since 

 last lesson and 

 sketch it. 



P ART n_A 

 LOG OF WOOD 



PREPARATIONS 

 FOR WORK 



Small lengths of 

 oak log (bearing the 

 bark) and of which 

 one end has been 

 made smooth should 

 be distributed, one to 

 each student. The 

 limb of a tree about 

 six inches in diameter 

 is very suitable. 



FIGURE 108. An Oak Log cut across. 



DIRECTIONS TO THE PUPIL 



(2) Look at the side of your log. 

 Answer this question : Make : 



Why are some parts of the bark A sketch of a 

 rough while others are smooth ? small piece 



of bark 



110 



Leave : 



A space for a 

 fin ished 

 drawing 



