THE ELECTRICAL RAT. 



423 



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

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

 by energetic circulation and respiration. As in muscular 





Fig. 392. — To'pedo manruratas. a, brain ; ^, modnlla oblongata ; f, spinal cord ; 

 d ana 6', electric portion ()f the trigemiuaie ur fif'tli pair of nerves ; ee\ electric iiortion 

 of the pneumogastric or eighth pair of nerves ;/", rc-current nerve; </, left electric 

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

 A, the last of the branchial chambers ; i, mucus-eecreting tubes.— From Gervaia and 

 Van Benf den. 



exertion the electrical power is increased by the action of 

 strychnine (Owen). 



Marey has more recently made interesting experiments on 

 the torpedOj examining the discharge of this fish with the 



