PI.ATK CIV. 



Kli;. 1:71. Ordinary electrode: 

 shielded. 



KlU. 272. A Hon-polarizable 



i the ii-ln hand being tlic pair spoken 

 ie bearer. 



the text as curved .and 



Kit;. 27?. Ends of nun-polarizable electrodes. A, with the clay plug 6 projecting beyond the glass tube; B, with 

 the end of the glass tube closed and bent, a hole being drilled iu the tube at ft', to expose the plug ; c, oblique eud 

 with the clay plug flush with the glass tube. 



I'm. -74. Krwnecker's forceps. 



FICJ. 276.-m-u,'i"i>n <>f th.' :iriMii-.-iiient..,f apparatus for studying tin- effects of rlrrt n it,, mis or irritability. A, the 

 inuscleon wh..sc nerve an placed d) the polarizing ele :tn.de.Jri''. connected )>y the commutator C with the two celled 

 battery II; (L-), ,lie exritin.u- electroiles !: K', COIIIK i-ted tlin.n.uh the Du I'.uis' key ,i with the secondary coil 1>. 

 c. thepriiu;u-y coil, connected tlirou^li the key I, with the cell I:. 



