THE ELECTRICAL RAT. 433 



j)roducing a shock. The benumbing power is lost by fre- 

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

 by energetic circulation and respiration. As in muscular 



Vxg.SQi.— Topedonurniralus. a, cerebrum ; S, the medulla ; c, spinal cord ; 

 d ana 6', t'lectric portiou ■ f tlie trigeminate or fifth pair of nerves ; ee\ electric portion 

 of the pnenmogastrlc or eighth pair of uerve-= ;/, recurrent nerve ; g, left electric 

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

 h, the last of the hrancuial chambers ; i, mucus-secreting tubus. — From Gervais and 

 Van Ben- den. 



exertion the electrical power is increased by the action of 

 strychnine (Owen). 



Marey has more recently made interesting exi^eriments on 

 the torpedo, examining the discharge of this fish with the 



