1 8 BIOLOGICAL PHYSICS 



and the process of disintegration the adynamic reign of 

 vital phenomena, the two balancing each other in exact 

 proportion so long as the condition of perfect health is 

 maintained. 



The meso- and hypo-blastic areas may be regarded as 

 altogether actuated or innervated by sympathetic nerve 

 influence, and consequently the protoplasmic formative 

 and nutritive phenomena displayed in those areas may be 

 said to be altogether effected by sympathetic agency, while 

 the epiblastic area may be regarded as dynamically actuated 

 or innervated by the conjoined influence of both the sym- 

 pathetic and the systemic nervous systems, the metabolism 

 of the tissues of each being effected entirely by nerve 

 agency, material as well as dynamic. Apart from this 

 compound, or materio-dynamic nerve agency, no life 

 worth the name can be displayed. 



