AGE, GROWTH, AND DEATH 



long remains unperformed, and when at last such 

 neighbour ideas, which naturally should be united in 

 close companionship, are brought together and made, 

 as it were, into one, we are astonished that the in- 

 evitableness of the union had not obtained our notice 

 before, it is so very obvious. And so in regard to the 

 conception of what constitutes the restoration of the 

 young state, I have only this excuse to offer, which I 

 have indicated to you, that even the natural thought 



FIG. 58. Tarsius spectabile. SECTIONS OF THREE OVA IN VERY EARLY STAGES. 

 i, before cleavage; 2, cleavage into four cells; 3, multicellular stage. 



fails to occur to us. We are very dull even if we are 

 scientific. 



The pictures now before you represent certain early 

 stages in the progress of development of a mammal 

 by the name of Tarsius, a creature related to the le- 

 murs. The various figures illustrate the multiplica- 

 tion of the cells. That which I wish to call your 

 attention to can be well demonstrated by the com- 

 parison of the first figure, in which there is a single 



