nearly alike as possible, half-grown kittens were used 

 throughout. The amount of stimulation was regu- 

 lated by using the same apparatus for all the experi- 

 ments, and by placing a rheocord, resistance-box and 

 galvanometer in the primary circuit derived from two 

 one-liter copper sulphate cells. By manipulation of 

 the resistance-box and rheocord, the galvanometer 

 needle was brought to a given position and held at this 

 point during each experiment of the series. The 

 results require little more than tabulation. 



Table VII. 

 Series with Equal Stimulation. 



m 



g3§| 



lljl 



aS2 



Cat No. 7 (operated | 

 upon and left with- a 

 out stimulation for J 



^o 



s SS i 



2i hrs.) Ohrs. 100 14.20 —iJ%*—6.9% 



14.54 



CalNo.T) 1 " 100 14.70 -irU.li +22% 



13.51 



CalNo.Q 2i " 200(T.)f 11.S6 +\Z.?,% +2\% 



10.95 



CatNo.8 5 " 100 15.97 + 17.1^ -f-24..3; 



14.38 



Cat No. n 10" 100 16.19 +3H +43.9' 



tS. 100 13.35 



S. 100 (T.) 

 100 (T.) 



* The minus sign indicates that the nuclei of the right ganglion 

 are larger in this case. In the only other set measured from a 

 normal pair, the nuclei were also slightly larger in the ganglion of 

 the right side. 



\ Sets marked T. are measured by a third person, with whom every 

 precaution was taken to obtain a purely mechanical and unpreju- 

 diced measurement. 



X Sets marked S. are those in which only nuclei in cells of over 

 50 fi diameter were measured. 



