530 



ROSS G. HARRISON 



shown by the fact that the cells of the myotomes differentiated 

 into muscle fibers, which after about five days began to contract 

 sporadically, indicating a functionally intact neuro-muscular 

 mechanism. The results of this set of experiments are sum- 

 marized in table 1. 



Series IV. The twelve preparations of this series were put 

 up in the same way as the last except that Locke's solution was 

 used instead of sermn. The results were not so conclusive as 

 in the last set, though they presented no contradictory evidence. 

 Only two of the six spider web preparations showed cell move- 

 ment in any considerable degree, two others were doubtful, 

 while the remaining two gave no promise of activity at any time. 



TABLE 1 

 Experiment III. Tissue in all cases medullary cord and myotomes 



1 Injured. 



2 A few outwanderint 



cells found on cover. 



