INORGANIC RESPONSE 



145 



In connection with the action of chemical reagents 

 the following points are noteworthy. 



(1) The effect of these reagents is not only to increase 

 or diminish the height of the response-curve, but also 

 to modify the time relations. By the action of some 



(6) 



Fm. 93. ' MOLECULAR ARREST ' BY THE ACTION OF ' POISON ' 



In each, curves to the left show the normal response, curve to the right shows 

 the effect of poison. In (a) the arrest is evidenced by prolongation of period 

 of recovery. In (6) there is no recovery. 



the latent period is diminished, others produce a pro- 

 longation of the period of recovery. Some curious 

 effects produced by the change of time relations have 

 been noticed in the account given of diphasic variation 

 (see p. 113). 



