I20 



HODGE. 



[Vol. VII. 



One experiment, in which the ganglia were suspended in a 

 large beaker of sterilized normal salt solution, gave more definite 

 results. 



TABLE III. 



Frog No. 14. Sciatic ganglia of right side suspended in salt 

 solution and stimulated three and one-half hours, five stimuli 

 per second, one minute of stimulation alternating with one 

 minute of rest. The ganglia of left side kept during this time 

 in blood of same frog. Two sets of one hundred nuclei each. 



r„3 



S 2. 



Mean diameters 

 in y.. 



Resting 14.70 -j 



Stimulated.. 13.10 >- 

 Diff..... ~T6o J 



Set I. — Measured by xn'^^tM previous to Mr. 

 W.'s measurement of set 2. 



-i \ 





Set 2. — Measured by Mr. W. without knowl- 



Resting '4-57 ^'^g^ of my results, and having but one of 



Stimulated.. 12.14 \ the ganglia in the field at the same time, 

 Diff. .... 2.43 and not knowing which had been stimulated 



and which not. 

 Sets I and 2, volume shrinkage, 36 %. 



Thinking that greater changes might be obtained at a higher 

 temperature, one experiment was made to test this; and, though 

 not entirely successful, the result may be given. 



TABLE IV. 



Frog No. 15. Cerebrum removed, and wound allowed to 

 heal before experiment. Stimulated five and one-half hours at 

 temperature 35° C. ; intervals of rest and stimulation, one 

 minute. Two sets of one hundred nuclei each. 



Mean diameters 



W) - 



s 

 O 



•2.S 





1 ^ 







O 



Resting 16.53 



Stimulated.... 15.66 



Diff ~T87 



Resting i7-40 



Stimulated. ... 15.84 



Diff. "7^56 



Resting 20.90 



Stimulated 191 3 



Diff. 1.77 



Set I. — Measured by myseli previous to 

 measurement of set 2. 



Set 2. — Measured by Mr. L. without 

 knowledge of my own measurements, 

 and not knowing which of the ganglia 

 had been stimulated. 



Set 3. 



Sets I, 2, and 3, volume shrinkage* 12.5 %. 



