( 64 ) 
to show the same phenomenon. Another phenomenon, which sometimes 
occurred in my experiments, was the dividing ofa period into several 
parts. Fig. VIII (table V) is the graphical representation of such an 
experiment. 
As far as my experiments go, this small discontinuity can appear at 
every moment in a given period, followed by the outset of a new period. 
If we compare these results obtained by the primary reflex-apparatus 
with those of experimental psychology, they appear to concord in 
many points. As appears from the critical summary of Foucauut *) 
also there a variable quantity showing a minimum is found for the 
oo page 
quotient =e most cases. The shape of the curve representing the 
be fer 
quotient R 38 function of 7, makes us suppose, that the experimental 
L 
psychology has seen only part of a large period. By the dividing of a 
) 
Eet Ak 
period into several parts, the quotient pp Seems to show multiple 
L 
minima and this occurs also in some experiments of the experimental 
psychology. Hence there is agreement in these respects between the 
results of the psychological and the physiological experiment. 
With regard to the mechanical effect I have pointed out, that this 
is greatly dependent on the rate of decay of the oscillations of the 
system. The rapidity of this decay is determined by the passive 
resistances in the chemical system. If these passive resistances are 
slight, a small increase of ? will be sufficient to call forth a change 
2 
AR 
in the system. Therefore the value of the quotient ER which is a 
measure of the value of these passive resistances, will determine the 
rapidity of the decay of these oscillations. 
In correspondence with this the experiment shows that the height. 
and the number of the elevations in every successive determination 
Cc 
increases with decrease of the value of the quotient Rr: Fie. “ie 
(table ID) observation 2, 3, 4, 5 shows this clearly. At the 5 obser- 
vation the resistances are so slight, that the system continues to oscillate 
for several seconds. Observation 8 and 10 show this same phenomenon 
at a higher value of PR, in the same series of observations. If we 
compare, however, observation 8 with observation 5, in which two 
AR 
observations the value of the quotient ri almost the same, and 
vu 
1) M. Fovcaurr. La psychophysique, 1901, 
