292 



THE SO-CALLED SECONDARY ELECTROMOTIVE 



The readings in cc' were taken by Herr v. Gendre, those in dd' by myself. The 

 delicacy of the two galvanometers was nearly equal ; mine was a little the more 

 delicate. That the deflections in spite of this were relatively smaller in c</ than in 

 dd' was due to the slower swing of the magnet of the first galvanometer, so that 

 during the deflection the after-current had already markedly decreased ; this we 

 ascertained by special experiments 1 . 



In order to establish the law still more firmly, experiments were 

 now arranged in which the two sartorius muscles were led off at the 

 upper end in the neighbourhood of the symphysis. If the law holds 

 good, then the + phase should appear more easily or even alone in 

 that muscle to which the kathode is applied (i. e. the reverse of what 

 was previously the case), since now the leading-off contacts, though 

 on the kathodic muscle, are in the neighbourhood of the physio- 

 logical anode. The prediction was most beautifully fulfilled. 



1 The galvanometer used in cc x was an ordinary Wiedemann, that in dd' one con- 

 structed by myself and described in Pfliiger's ' Archiv,' vol. xxi. p. 430. The damping 

 arrangement allows aperiodicity with relatively small astasia ; hence its superiority 

 aa mentioned before in the text. 



