OBSERVATIONAL LESSON XIX 



21 



PART III A DEVELOPING TADPOLE 

 PREPARATIONS FOR WORK 



The same will be required as for Part II of the last lesson. The frog's spawn 

 will be a week older. 



Note : If no spawn was obtained for the last lesson it should be studied at 

 this point. If it still cannot be procure 1, substitute the alternative subject. 



FIGURE 156. A Frog's 

 egg, 8 days old. 



FIGURE 157. A Frog's 

 egg, 12 days old. 



DIRECTIONS TO THE PUPIL 



(3) Examine and sketch the frog's spawn as before and describe 

 shortly what has happened ; sketch the egg. 



ALTERNATIVE SUBJECT FOR PART III A PUMPKIN SEEDLING 

 PREPARATIONS FOR WORK 



It was suggested in Part I, page 134, that the seed of the pumpkin should be 

 compared with that of the bean. Should frog's spawn again be lacking, a series of 

 seedlings of the pumpkin might be examined and drawn. 



DIRECTIONS TO THE PUPIL 



(3a) Make a sketch of a germinating pumpkin seed in the same 

 stage as the bean seen in figure 127, Part I, page 134. 



Take another, corresponding to figure 132, Part I, page 139. 



