470 



GAKY N. CALKINS 



be drawn into the pipette as a pair, but not sufficiently fused to 

 resist the pressure in the pipette. Contact of the protoplasms 

 was estabhshed, but persisted for only a short period. 



The experiments indicate that metamorphosis of the nuclei 

 and cell is an 'all or none' phenomenon, which once started 

 goes through to the end of reorganization whether the com- 

 panion cell is associated with it or not, and with this process of 

 reorganization is associated the renewal of vitality of the proto- 

 plasm and a new life-cycle. 



SPLIT 



Fig. 10 Successive stages in attempted reorganization of two individuals 

 of a pair which were accidentally separated ('split') in the pipette. One indi- 

 vidual died on the thirteenth, the other on the fourteenth day. Sketches from 

 the living organisms. 



Columbia University 

 New York City, March 26, 1921. 



