298 



LOCALIZED ELECTRIZATION. 



Fig. SO. — Kuhmkuifi's poitabie ajiiiuiatus. 



mercury ; and the elements are extremely simple. The carbon is 

 obtained from the inside of gas retorts, and is in the form of little 

 cups, in which are placed thin plates of zinc. The mounting of 

 this battery is very easy ; and its action continues sufficiently long 

 for most applications. It must, it is true, be mounted and dis- 

 mantled at each time of using. 



"There are two coils, which act precisely in the same manner, 

 and are, indeed, one coil divided into two. The graduator is a 

 copper covering external to the coils. 



"The interrupter is . the trembler of Neef; and a star outside 

 the box permits the production of intermissions. 



" The apparatus gives, at pleasure, the extra current or the in- 

 duced current. 



" It is represented in fig. 80 at one-third of its natural size." ^ 



(c). Dr. A. Tripiers apparatus. — This is a non-portable apparatus 

 with a detached battery. I have reproduced the author's illustra- 

 tion, and part of his description.'' 



" In this figure (fig. 81) the induction circuit is that of the reel 

 of fine wire, B ; the commutator C, and the handle D are so 

 arranged as to convey to it the battery current, the electrodes of 

 which terminate at a and a!. The rheophores attached to the 

 polar extremities of the circuit B receive, by two handles, the extra 

 currents of high tension that are developed in the circuit. The 

 rheophores attached to the reel B' proceed each to one of the 

 branches of a forceps for experimental purposes, and afford induced 

 currents of low tension. 



" The endeavour of M. Tripier is certainly praiseworthy, and it 



3 Le Koux, loc. cit., p. 50. 

 ■* Tripier, Manuel cVeledro-therapie, 

 I'aris, 18G1 (which see, for the different 



effects that, according to the author, may 

 be obtained by combinations of diftereut 

 parts of his apparatus). 



