420 M. M. Garver—Sensation and Volition through the Nerves. 
same as that obtained in our experiments, and must have its 
foundation in the same cause. 
XI. XIL XIII. XIV. aN; 
Right foot. Left foot. Right hand. Ear. XII dors. vert. 
5=1 9=1 10=4 16=1 10=3 
9=2 10=5 1i=3 M3 
10=3 11=4 12=9 18=4 Penta 
1= 12=5 13=10 19=7 is=35 
13==6 13=8 14= 4 14=3 o 
= 14 tas 1638 bee QS 3 18:5 *° 
=3 tas =10 16=2 9=2 (25 16=4 
6=10 5°" *> 16— tats 17=8 93=—4 Li=3 
= 17=8 [°° 18=—3 =1 18=3 
1%=7 18=0 19=2 19=0 
]8=4 19= 
i9—3 
From the many examples of the occurrence of these periods, 
it would appear that they have their origin in the physical or 
mental action of the individual, but their physiological or psy- 
chological significance is not known, and the complete elucida- 
tion can be hoped for only through the aid of more extended 
investigations, 
I 
some principally, perhaps, on account of the imperfect working 
wregular intervals so as to avoid anything like rhythm, thus 
requiring an act of perception and an act of volition for eac 
observation; and from what has been shown, it appears that 
these two acts cannot be performed with any great deg 
regularity. In order then, if possible, to obviate this difficulty, 
the pendulum of a clock was made to give the signals at inter- 
vals of a , each beat of the clock giving a signal which 
was red upon the smoked surface. The other coil in 
registe. 
connection with the answering key was used to register the 
answers. ‘T'wo coils are necessary because when but one 18 
