22 ETON MATURE-STUDY 



Take a third, in which the little plant is withdrawing itself from 

 the seed-coat. Can you find among your drawings of the bean one 

 which corresponds to this stage of the pumpkin ? What do you 

 think is the great difference between the two seeds. 



PART IV A DEVELOPING CHICK 

 PREPARATIONS FOR WORK 



Hens' eggs which have been incubated for twenty-four hours should be ready. 



DIRECTIONS TO THE PUPIL 



(4) Remove the outer coverings of half of the hen's egg, and 

 describe and draw what you see. 



(5) What do you consider to be one most important difference 

 in the development of the eggs of frog and hen. 



SUGGESTIONS FOR FURTHER WORK IN SCHOOL 

 Eggs that have been incubated for two days might be examined 

 and the developing chick seen. The beating of the heart can be 

 made out, and blood-vessels will have made their appearance on the 

 surface of the yolk. 



FIGURE 158. A developing Chick, 

 two days old. 



