CONTROL OF ORGANIC POLARITY 487 



4. Under conditions in 3, stolons may regenerate and function 

 normally on ends toward the cathode. 



5. Statements under 3 and 4 hold for pieces irrespectively of 

 whether basal or apical end of an internode is pointed toward 

 the anode; that is, the inherent normal polarity of the inter- 

 node may be reversed by means of an electric current. 



6. A current density barely able to inhibit regeneration in 

 basal internodes cannot inhibit regeneration in apical inter- 

 nodes of the same branch. 



7. The establishment of an electrochemical polarity is probably 

 a primary, fundamentally associated condition for the development 

 of morphological polarity, because the physiological mechanism 

 which determines morphological polarity can be controlled and 

 directed by an electric current of external origin. 



