OBSERVATIONAL LESSON XXXIII 



133 



leaf (a piece of paper will do instead), how many times would 

 you have to cut into it, in order to make one of the little lobes which 

 you have been sketching in the fern ? 



PART II A SILKWORM (continued, Uli Investigation) 

 PREPARATIONS FOR WORK 



Give each pupil a silkworm cocoon. 



FIGURE 237. 

 A Silkworm 

 Chrysalis. 





FIGURE 238. A Silkworm Cocoon from which the moth 

 has emerged. 



DIRECTIONS TO THE PUPIL 



(4) Make a sketch of the cocoon of the silkworm, and leave a 

 space for a finished drawing. 



(5) Carefully slit open the cocoon and gently remove the chry- 

 salis. Is there anything in the cocoon besides this ? Write down 



