INNERVATION OF LEG MUSCLES 61 



DEMONSTRATIONS. 



1. Beating of lymph-hearts after removal of the skin 

 over them in frog with brain destroyed. 



2. Reflex action of frog without cerebral hemispheres 

 or mid-brain. 



3. Reflex action of frog without cerebral hemispheres. 

 (The hemispheres may be destroyed by crushing them 

 through the skull with pliers made so that the jaws have 

 a parallel movement.) 



4. Knee jerk and plantar reflex. 



