( 65>) 
also observation 10 with observations 3 and 4, it appears, that in’ 
the second place the rate of decay is dependent on the absolute value 
of FR. Supported by these and more similar observations we may 
say that the rapidity of the decay of the oscillations increases with 
ie NE AR 
increasing value of # and with increasing value of the quotient - 
L 
In this we have to keep in view, that the first observation always 
occupies a special place; for this observation AP is always very 
large, and though the method followed does not enable us to deter- 
J? 
R | 
mine the quotient RE for this observation, this quotient is probably 
? : 
also very great. Notwithstanding this we always see that the rate of 
decay is very slight and from this we should have to conclude, that 
the influence of the absolute value of 2 on the rapidity of this decay 
is preponderant in the beginning. 
The same experiments which I have described for the frog whose 
spinal cord is cut through, can also be performed with perfectly 
intact frogs. For this it is necessary to wrap up the whole animal 
carefully in wads with exception of the hind leg which is used 
for the experiment. If we take care to avoid tactile and auditory 
stimuli, the frog remains quiet during the experiment also under these 
circumstances *). In this case the result of the experiment is the same 
as that of the preceding one. 
Fig. IX (table VI) is the graphical representation of an experiment, 
0 40 #0 60 JO foo 120 140 160 FO 200 120 10 260 so 
Fig. IX (Table VI, exper. 46). 
If the first period is small, it is possible to see also here a part of 
a second period appear (Fig. X, table VIL). This second period seems 
also greater than the first, while the oscillation, which the value of 
J 
. \ . . . . 
the quotient R shows in this period, seems relatively to be smaller. 
JA] 
1) In these experiments the solution of acid in the burette contained 80 grams of 
oxalic acid per liter solution. 
D 
y 
. 
Proceedings Royal Acad, Amsterdam. Vol. \ 
