320 



LOCALIZED ELECTRIZATION. 



/ 



powerful apiDaratns into one that is more or less weak, in such a 

 manner that, reduced to its miuimum, its graduating tubes will 

 measure its weakest doses as exactly as its most powerful ones. 



\_Stohrei-'s inductio7i a^ypnratus. — Probably the greatest obstacle to tlie use 

 of induced electricity as a therapeutical agent in England, has been the want of 

 an eflBcient portable induction apparatus, in which the trouble commonly 

 connected with the regulation of the voltaic elements shall have been reduced 

 to the smallest point, which should be at all times immediately available for 

 use, and which should not prove too costly. This obstacle has been most 

 successftilly overcome by Emil Stbhrer, Ph.D., of Dresden. He has con- 

 structed an induction apparatus, that fully meets the requirements of daily 

 practice. The peculiarity of this apparatus consists in the arrangement of 

 the zinco-carbon cell, already described (p. 57, fig. 15). The simple mechan- 

 ism by which the elements can at once be immersed, or removed from the 

 exciting liquid, and the length of period over which, with ordinary care, 

 these elements retain their activity — without need for re-amalgamation of 

 the zinc, or removal of the acids (not less, indeed, than from six to eight 

 weeks) ; these are invaluable advantages in active practice. They render 

 the use of induced electricity, for all purposes of diagnosis or treatment to 

 which it may be applied, as facile as the test of a speculum, an ojihthalmo- 

 scoj^e, or a laryngoscope. The readiness with which this induction apparatus 

 can be placed in action, makes it highly desirable that one should be kept 

 at hand in all hosi3ital operation rooms, and, indeed, in all institutions where 

 chlorol'orm is used ; for it affords an instant and most valuable means of 

 exciting artificial respiration in asjihyxia, by faradization of the i^hrenic 

 nerves. 



Stolirer constructs a smaller (fig. 91) and a larger (fig. 92) induction appar- 



Fig. 91. — Siiihrer's smaller induction .ippanitiis. 



