96 , THE PSYCHIC LIFE 



formed; the day after, the fragment had increased 

 considerably in bulk, and in two days more the ani- 

 mal had formed a mouth. During this time, the nuclear 

 grain had multiplied: five, in fact, were counted. The 

 animal had the normal form; its size, however, was a 

 little smaller than that of the ordinary Stentors. 

 Thus, through the action of a small quantity of nu- 

 clear substance, the fragment has been completely re- 

 constructed. 



It frequently happens that the artificial severing of 

 the animal causes various deformations in the frag- 

 ments. The deformation disappears with the greatest 

 rapidity in fragments containing nuclear substance. 

 The wound heals instantly; directly after severance, 

 the two edges of the wound are seen to adjust them- 

 selves to each other. 



In all these particulars, the experiments confirm 

 the results obtained by Gruber. 



M. Balbiani desired to ascertain what would hap- 

 pen if the division were made during the state of con- 

 jugation. 



Conjugation, as we -know, aims at replacing an old, 

 spent element, that has lost its physiological proper- 

 ties, by an element of new formation proceeding from 

 an attendant nucleus (nucleolus) exchanged between 

 the individuals in conjugation. The point in question 

 was to ascertain whether the nucleus that was be- 

 ginning to disappear, had lost its regenerative power. 

 In the Stentors, during conjugation, this old nucleus 

 breaks, and its nuclear globules are scattered to all 

 parts of the protoplasm. When at this stage, the body 

 of one of the Stentors is divided in such a manner that 

 the fragment contains some of the scattered globules 

 that came from the old nucleus. It is quite evident 



