( 18 ) 
two muscle-reflex arcs, as it is really measured, but then OK= 
OD—OA is the value of the tone-inhibiting influence exerted by 
the secondary muscle-reflex arc. This determines point E and con- 
struing curve EF between the two points according to the law of 
FECHNER, this curve becomes the graphical representation of the 
tone-inhibiting influence exerted by the secondary muscle-reflex 
are. Over the interval of the charge OF the difference of the 
ordinates determined by the two curves DB and EF must 
now at any moment be equal to the ordinates determined by the 
curve AB. 
It appears clearly from this graphical representation, that there 
can only be question of a definite problem in these cases, where 
the curve shows an inflection point and that the possibility of this 
analysis depends on this. 
The result of the measurement and of the calculation of 
the tonicity-quotients performed on this basis is given for four 
curves. 
