THE ELECTRICAL RAT. 



423 



producing a shock. The benumbing power is lost by fre- 

 quent exercise, being regained by rest ; it is ulso increased 

 by energetic circulation and respiration. As in muscular 



S 



Fig. 392. To pe<lv ntariiutratus. c, cerebrum : b, the medulla ; c, spinal cord ; 

 </and &', electric portion of the trigeminaie or fifth pair of nerves ; ee', electric portion 

 of tin- pneumogastric or eighth pair of nerves ; ./', ivcunvnt nerve ; g, left electric 

 organ entire ; g', right electric organ dissected to show the distribution of the nerves ; 

 h, the last of the branchial chambers ; i, mucus-secreting tubes. From Gervais and 

 Van Beni-den. 



exertion the electrical power is increased by the action of 

 strychnine (Owen). 



Marey has more recently made interesting experiments on 

 the torpedo, examining the discharge of this n'sh with the 



