380 BIOLOGICAL PHYSICS 



the least expenditure of energy, and the highest attain- 

 ment of speed, consistent with safety to the machine, and 

 the realisation of the intention of its existence. 



The two nervous systems are arranged, within the 

 body, in such a way, as to work in the manner here 

 attempted to be described, either singly, or dually, as 

 required, and are surrounded, on all sides, by the so-called 

 non-nervous textures of the body, through which they 

 operate, in performing their various functions, and which, 

 in turn, they energise, and keep in material and dynamic, 

 union and cohesion, for the accomplishment of individual, 

 and communal organic ends and purposes, and organismal 

 necessities. 



For these high purposes, the two systems, are evolved 

 on two essentially different lines, the one, the sympathetic, 

 beginning with the dawn of embryonic life, and perpetu- 

 ated from pre-existent, or parent, sources, and the other, 

 the systemic following, when the conditions of life of the 

 embryo transcend the powers of its more rudimentary 

 being, and working, and call for a still further evolution 

 of the conditions of life, if the organism is to continue to 

 be further evolved, and its organic destiny attained. 



The stages of evolution, or developmental progress, 

 thus exemplified by the embryo, and ranging from the 

 unicellular, to the multicellular, group themselves along 

 the lines of cell proliferation, and cell organisation, for 

 growing, and increasing, functional purposes, tissue for- 

 mation, and visceral development, for special purposes, 

 the growth of limbs, and consciously exercised motive 

 power. The systemic system, it is thus seen, comes on 

 the developmental scene, when the sympathetic has laid 

 the foundation for, and used up much of its evolutionary 

 energy, and material, in the formation of an incipient 

 ultra-sympathetic nervous system, destined to blossom 

 into the great psychological instrument of brain, cord, 

 and nerves, through which, dead matter can be made the 

 instrument of, consciousness, intelligence, and morality, 

 to raise man to a height of destiny not yet attained by 

 his lower relations, in the scale of life, and being. 



Inside the so-called non-nervous structures of the body, 

 insulated, and encased, by many a layer of nf n-conducting 



