438 Prof. C.S. Sherrington and Miss 8. C. M. Sowton. [Dec. 30, 
iene eee tae 
Fic. 3.—Isolated Vasto-crureus Muscle ; decerebrate preparation. Ascent of myogram 
lever signifies contraction ; descent inhibitory relaxation. Time above in seconds ; 
signal below. The series of records were all obtained in succession from the same 
preparation. During the downward gap in the signal line series of double induction 
shocks at the rate of 28 per second from an ordinary inductorium were delivered: 
through non-polarisable electrodes to the central stump of the severed ipsilateral 
popliteal nerve. The series of induced currents were successively increased in 
strength by bringing the secondary coil from 28 cm. to 26 cm., 23 cm., 20 cm.,. 
18 cm., 16 cm., and finally 15 cm. distance from the primary. With this increase of 
intensity of stimulus the reflex effect on the muscle changes from contraction to 
inhibitory relaxation. 
a stronger stimulus elicits a more abrupt contraction than does a weaker, 
and this has to be remembered in comparing particular instances of the two 
kinds of stimulation. With the faradic stimulus especially the contraction 
