PHYLOGENY AND ONTOGENY OF NEURONA 49 



ends by their uniting themselves in the centre of 

 the animal, which is what Herbert Spencer calls 

 transversal integration. Hence the cerebro-spinal 

 system originates here, and arrives in man at the 

 importance it now holds. 



The mechanical or functional unity is not lost, 

 in spite of the progressive division and differen- 

 tiation of the form ; and this, as we have seen, 

 is the result of universal mechanics, and in this 

 case the structure, like the sand in Tyndall's 

 experiment, keeps its regular forms by reason 

 of the rhythms which made the crystal bowl 

 vibrate. 



Therefore we say that there is no disputing the 

 priority of the organ over the function, nor the 

 former over the latter ; the one being a static 

 manifestation, the other dynamic, of the same 

 cause, viz. universal mechanics. 



The form of bodies is the resultant of natural 

 rhythms. The organ is the point of support 

 which Nature takes to give expression to its 

 rhythms. 



When the heart quickens its beat at some emotion 

 it moves the circulatory springs to quicken the 

 circulation of the blood and increase the activity 

 of the cerebral neuronas in which the emotion or 

 enthusiasm has rise. The rhythms of natural forces 



go on generating the harmonies of intelligence in 



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