ON THE MAMMALIAN NERVOUS SYSTEM. 



353 



with the galvanometer, the right hemisphere was stimulated, the result being an effect 

 of only 22 degrees. This last result, in addition to being only a twentieth of that 

 evoked by the corresponding cortex was probably due to discharge from the left hemi 

 sphere, for, after the cortex had been allowed to rest, this pair of observations was 



Fig. 8. 



repeated with the following striking results, viz., the right cord being observed, the 

 left hemisphere was excited, with a resulting variation of 365 degrees. The same 

 cord being still led off, the right hemisphere was excited, i.e., the hemisphere of the 

 same side, and no effect was produced in the galvanometer. The same degree of 

 narcotisation being maintained, and the same strength of coil being employed as that 



MDCCCXCI. B. 2 Z 



