70 Heredity and Social Progress 



tinuity of consciousness without any enduring 

 success. Only one way out of this difficulty is 

 apparent a growth in the envelope of the cell 

 elastic and strong enough to prevent complete 

 separation of the divided cell. Multicellular 

 organisms then appear which preserve all the 

 characteristics of the unicellular activity, con- 

 tinuous rhythm and growth in two balanced 

 parts. Any disturbance of the equilibrium 

 proves destructive of the organism and each 

 half corresponds to the other, both as a whole 

 and in its parts. Every movement in one 

 part is followed by a rest and an activity in the 

 other part. Movements may be said to be 

 katabolic changes in the germ cell affecting the 

 somatic cells, while memory is the effect on the 

 germ cell of katabolic changes in the somatic 

 cells. The more important the latter becomes, 

 the less is the stress on the original cell, which 

 if too frequent or strong, would by disrupting 

 it end life. The development of instinctive 

 responses in the somatic cells which follow 

 nervous growth also relieves the original cell 

 without interfering with the continuity of con- 

 sciousness. Memories now become the leading 



