76 



Art. 1.— K. Fuji ; 



In Oscillügram No. 71 (Plato XXII.), similar proloDgations of the 

 modal latent i:)eriods may be observed in the experiments of the 

 ascending-stimnlns which were made after a series of experiments 

 of the descending-stimulus. But there is no proof that the 

 prolongation was tlie influence of the previous descending stimulus. 



Tai'.le XXX. 



Here the stimuli of No. 1. — No. o and tliat of No. U were 

 descending, and those of No. (J, No. 7 and No. 8 were ascending. 



In the oscillograms we may observe tliat wlien tlie modal 

 latent period exhibits its prolongation, it is alwa^^s accompanied 

 by the decrease of the magnitude of the corresponding discharge, 

 although the converse is not true always. We may remark here 

 that this law applies to all cases whetiier tiie cause of prolongation is 

 the temporary fatigue or any other alteration in the nerve, or that 

 of an unknown cause like tliat above described. On tlie contrary, 

 Avlien the magnitude of the discliarge is small on account of the 

 smallness of the stimulus, the prolongation does not appear. This 

 shows that, when the })rolongati(.)n appears, the nerve-fibres are 

 changed in its state and in consequence the discharge becomes small, 

 i. e. evei'v " all " of an excitation itself in the nerve fibres becomes 



