150 COMPARATIVE PHYSIOLOGY 



appropriate conditions to elicit a characteristic response. Yet 

 in fact its responses are at any minute definite and restricted. 



Further Reading 



Keith Lucas. The Conduction of the Nervous Impulse. Longmans, 



Green. 

 LiLLlE. Protoplasmic Action and Nervous Action. Univ. Chicago Press. 

 Hill (1921). The Energy Involved in the Electrical Discharge in Muscle 



and Nerve. Proc. Roy. Soc, B. 92. 



