te 
ELECTRIC PULSATION IN DESMODIUM GYRANS. 
A similar sign of 
electric responses undergoing a diminution. 
411 
fatigue (fig. 3) is also seen with the mechanical responses 
Fig. 3. 
ae. 
e 
8 
t) 
. 
a 
a 
. 
. 
e 
’ 
‘ 
a 
a 
. 
. 
J 
. 
! 
> 
. 
’ 
J 
. 
a 
. 
. 
. 
. 
Y 
a 
e 
2 
given by the plant. 
occasionally exhibited, is that of periodic fatigue ; that is to 
Fig. 4. 
3 
Fatigue exhibited in the mechanical responses of Desmodium gyrans. 
4 
l 
Periodic fatigue exhibited in the electric responses of Desmodium gyrans. The 
principal wave is represented by a continuous line and the subsidiary wave 
by a dotted line. The double responses undergo continuous diminution 
till the third complete period; at the fourth they attain a large value, 
similar to the first ; after this the cycle is repeated. 
5 
But the most curious case, which is 
