INTRODUCTION 5 



division into two main groups, dynamically operated by 

 the sympathetic and the systemic nervous systems respec- 

 tively these two nervous systems in reality constituting 

 the two organic elements of which the living body is 

 composed, not only physically but dynamically : that is to 

 say, the sympathetic nervous system innervates as well as 

 composes the elements structural and visceral of the organic 

 life, while the systemic nervous system, in like manner, 

 innervates, as well as composes, the elements of the volun- 

 tary neuro-muscular life, the two jointly innervating and 

 composing certain of the structural and visceral elements, 

 responsive to their joint, or mutual, control in certain 

 regions of the body. Of this universal circulation the 

 areas principally dealt with are the nutritional, or metabolic, 

 within the sympathetic division, and the general nervine 

 within the systemic division consisting of what remains 

 unaccounted for by the sympathetic, i.e. the neural lymph 

 and nerve substance circulations. 



In connection with the subjects of nutrition and meta- 

 bolism, the basal structural organism, the cell, is dealt with 

 in its dual developments of sympathetic nerve cell and 

 systemic nerve cell, or neuron, respectively. 



Why these areas of the universal circulation are more 

 particularly dealt with is, that they have not been given 

 the exhaustive attention that the other circulatory areas 

 have received, and that if universal circulation is to attain 

 to the fully understood condition of the circulation of the 

 blood and other less widely distributed circulations, it is 

 necessary that not a single step, or stage, of it should be 

 neglected or left out. 



The subjects of the neuron and neuronogenesis from 

 their foundation position in systemic nervine nutrition and 

 nerve energy production have also received considerable 

 attention in several somewhat novel directions ; as, for 

 example, that every nerve cell or neuron does not receive 

 its nutritive pabulum directly from the blood circulation, 

 but from the matrix of this neuroglia, and, contrary to the 

 usual teaching, that its dendritically imbibed protoplasm 

 is excreted along its axonal process, or processes, into the 

 sensory and motor terminal arborisations respectively, in 

 the form of organisable material which is utilised by the 



