172 THF. XKKYofS SYSTKM \\T> ITS < '( )\SKU\ ATK >\ 



of the heart-beat will lie iepn>duced by oscillation.- of the 

 indicator. \'oluii1:iry muscle contractions will displace it. 

 Now, if a -cries of words is spoken in the presence of the 

 man whose hands are in circuit witli the galvanometer, it 

 is likely that at least a small excursion will follow each 

 word. But some words will have much more power than 

 others to give direction to his thought- and to arouse his 

 feelings. The swing of the galvanometer will faithfully 

 demonstrate the degree of the emotional response. Thus. 

 if names of girls are repeated, the subject of the in<nii-i- 

 torial experiment may react to each stimulus by an appre- 

 ciable sign, but he will pay tribute to the name of his 

 fiancee by a striking movement of the recorder. These 

 electric disturbances are not surely localized, but they 

 testify to the involvement of contractile or secreting 

 structures perhaps of both in the phenomena of emo- 

 tion. 



