124 



HODGE. 



[Vol. VII. 



TABLE V. 

 Cat No. I. Stimulated for seven hours ; intervals one minute, 



spaced by hand. 



1st thoracic. Hardened / Resting 16.29 



in osmic acid. I Stimulated. . 14.07 



Nuclei (4 sets, 100 each). 

 Mean diameters Shrinkage 

 in /oi. in volume. 



Diff. 



2.22 



8th cervical. Hardened / Resting 14.91 



^ in corrosive sublimate. I Stimulated. 



Diff. 



11.70 



3-21 



7th cervical. Hardened J Resting 16.60 



Stimulated. 



^ in Flemming's fluid. 



Diff. 



1 541 

 1.19 



6th cervical. Hardened / Resting 14. 



in picric acid. l- 



Stimulated. 

 Diff... 



1423 



•75 



35% 



(Selected.) 

 51 % (T.) 



20% 



14.6% 



Cells. 



Mean diameters 



in fi. 



59.06 



57-19 



All over 

 50 M- 



57-50 

 56-25 



44.21 



44-74 



Sets I, 2, 3, 4, volume shrinkage, 28.6 %. 



Several points in the above table call for remark. The seat 

 of most active change is again seen to be within the nucleus. 

 It is to be noted also that the greatest amount of difference 

 between resting and stimulated nuclei occurs in the ist thoracic 

 and 8th cervical ganglia. This may be due to the fact that a 

 greater number of the nerves from the 6th and 7th cervical 

 ganglia escape stimulation. Or it may be that, coming first 

 between the electrodes, the branches from the ist thoracic and 

 8th cervical tend to short circuit the current and thus deprive 

 the others of a due share of the stimulation. At any rate, the 

 6th and 7th cervical have failed to show the effect of stimula- 

 tion to the extent shown by the 8th cervical and ist thoracic; 

 and for clearest results I have found it best to include in the 

 circuit the medius and spiralis nerves, with the small branches 

 lying between and behind these, and then use only the 8th 

 cervical and ist thoracic ganglia. Another word of explanation 

 may be added. It must be taken into account that, in clasping 

 the whole plexus between the tines of the electrode, we are 

 stimulating an enormous number of nerves. When the strength 

 of the stimulation is tested, if the tip of the electrode only is 

 touched to the tongue, the stimulation is concentrated on a 

 small area and affects but a few nerve fibres. The stimulation 



