6 4 



PROBLEMS OF GENETICS 



remain free from prejudice as to the nature and causation of the 

 period or rhythm, we may safely declare, and a comparison may 

 thus be instituted between the consequences of meristic repetition 





FIG. 9. Osmotic growths simulating segmentation. (After Leduc.) 



in the bodies of living things and those repetitions which in 

 the inorganic world are due to rhythmical processes. Of such 

 processes there is a practically unlimited diversity and we have 

 nothing to indicate with which of them our repetitions should 

 rather be compared. 



