ELECTRICALLY STIMULATED GANGLION CELLS. 



J[eAN DiAMETEnS IN fl. 



Resting 14.70 Set 1. Measured by myself previous to 



Stimulated . .13.10 Mr. W.'s measurement of set 2. 



Set 2. Measured by Mr. W. without 



Resting 14.57 knowledge of my results, and liaving 



Stimulated . . 12.14 but one of the ganglia in the field at 



the same time, and not knowing which 



Dili. 2.43 had been stimulated and which not. 



Sets 1 and 2, volume shrinkage, 36 per cent. 



It was thought that greater changes might be ob- 

 tained at a higher temperature ; accordingly one 

 experiment was made to test this, and though not 

 altogether successful, the results may be given. 



Table IV. 

 Frog No. 15. Cerebrum removed and wound allowed 

 to heal before experiment. Stimulated 5* hours at a 

 temperature of 35° C; intervals of rest and stimula- 

 tion being one minute. Three sets of 100 nuclei each. 

 Mean Diameters in u. 



Resting 16.53 Set 1. Measured by myself previous to 



Stimulated . .15.66 measurement o"f set 2. 



Difr. .87 



'1^ I Resting 17.40 Set 2. Measured by Mr. L. without 



Stimulated . . 15.84 knowledge of my own measure- 



i s t ment, and not knowing which of the 



g . Diff. 1.50 ganglia had been stimttlated. 



II I Resting 20.90 Set 3. 



-g-f Stimulated ..19.13 



"^1 Diff. 1.77 



Sets 1, 2 and 3, volume shrinkage, 12.5 per cent. 



It is to be noted that both Mr. W.'s and Mr. L."s 

 measurements make the difference greater tha:n my 

 own. Staining and structure of protoplasm not well 

 defined ; due probably to the fact that the frog died 



