10 



LEWIS R. GARY 



TABLE 1— Continued 



Mean of all observations 



Explanation of table: The letter C after the measurement for any day indicates 

 that the central activity had been filled by the regenerated tissue. 



The results from the forty disks recorded in table I are shown 

 in figure 4 in which the divisions along the abscissa sho\^' the 



Fig. 4 Showing the relative rates of regeneration of the halves of 40 disks. 

 The upper (solid) curve is for the half disk with sense organs, the lower (broken) 

 curve is for the half disk without sense organs. The divisions along the ordinate 

 represent the amount of regeneration in millimeters. Those along the abcissa 

 the time of regeneration in da}^s. 



