362 BIOLOGICAL PHYSICS 



blood circulatory machinery, the mechanism of nutrition 

 of the non-systemically innervated textures, and the 

 great lymph circulation, with the organs, and viscera, sub- 

 servient to the purposes of organic life, and the various 

 textures composing all of them. The systemic nervous 

 system, must, therefore, be composed of all parts, and 

 structures, unaccounted for in this list, and lays claim to 

 its own particular structures, composed of the brain, 

 spinal cord, and nerves, together with the muscles, tendons, 

 and, to some extent, the bones, with, more or less, of the 

 associated, and dovetailed, structures, uniting, and func- 

 tionally associating, the two systems, in their combined 

 work of maintaining the vital integrity of the organism, 

 and superintending its life-work. It goes without saying, 

 therefore, that all the above exists latent in the molecular 

 constitution of the fecundated ovum, and but requires, for 

 its evolution, the existence of certain conditions, supplied 

 from parental sources, " ready to hand/' nothing, here, 

 being left to chance, or accident, but, on the contrary, 

 everything, to the minutest requirement, material, and 

 dynamic, being provided with unerring precision, as to 

 time of doing, and sequence of formative result, with the 

 consequence, that " like produces like," in accordance 

 with the organic axiom, deduced by embryological science, 

 from manifold observation, and supporting experimenta- 

 tion. 



