JUGGLING WITH LIFE 



domain of the organism at the early stage when its 

 original cell had divided into two, or had undergone 

 a second, or even a third division. Left to its own 

 devices, and under the influence of the laws of 

 normal development, the egg which now consists of, 

 let us say, four cells, would develop into a single 

 individual fish. The four cells are as much parts of 

 one individual as are the arms and legs of any given 

 man parts of one individual. 



Yet Dr. Driesch succeeded in teasing these four 

 cells apart and saw each one of them begin life anew, 

 as it were, as a separate individual. 



And in due course each of the four developed into 

 a complete and normal fish, differing in no obvious 

 way from other fish of the same species except that 

 they were smaller in size. The fact of reduced size, 

 however, gives emphasis to the feeling, which one 

 cannot well escape, that the four fish represent what 

 might be spoken of as a multiple personality, and 

 that each individual lacks something of a complete 

 and normal inheritance. 



In similar experiments with sea-urchins, Professor 

 Loeb found that the embryo might be bi-sected after 

 it had reached the sixteen-cell stage; each part devel- 

 oping into a complete individual. 



THE CASE OF TWINS 



It is of interest to note that the laboratory experi- 

 ment whereby the miracle is thus performed of di- 

 viding one individual into two or four complete 

 individuals, is duplicated in human experience in the 

 case of what are spoken of in common parlance as 



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