CHAP. XXV.] PHRENOLOGY : OLD AND NEW. 525 



activity of other centres may co-operate ; and just as the 

 sight of ripe fruit upon a tree may incite a ' desire ' to 

 possess, followed by a Volitional Stimulus for the purpose 

 of obtaining the desired object ; so in this case the parts 

 concerned in the manifestation of the * desire,' and those in 

 which the Volitional Stimulus originates, are probably 

 situated within some portions of that same area of con- 

 volutional grey master which was concerned in the Percep- 

 tive Act itself. 



On the other hand, as the writer has elsewhere said,* 

 " inasmuch as we have certain distinct avenues of know- 

 ledge (through the Sense Organs and their proximate 

 nerve ganglia), and the Cerebral Hemispheres are the parts 

 concerned in the elaboration of impressions so derived, we 

 can well understand that the impressions entering through 

 one gate or sense-avenue, may pass through the substance 

 and towards the periphery of these Cerebral Hemispheres 

 in certain definite directions, and according to accustomed 

 routes. Then, the impressions entering through another 

 gate of knowledge, or avenue of sense, may, and probably 

 do, pursue a different direction through its substance, so 

 that at the periphery the fibres and cells concerned in the 

 conduction and elaboration of these impressions may 

 exist in maximum quantity in different portions of the 

 surface of the Hemispheres though in part they may 

 occupy jointly the same area, and be intertwined with the 

 fibres and cells concerned in the elaboration of the pre- 

 viously mentioned set of impressions. And so on with 

 the various sense organs and their ultimate expansions in 

 the form of what I would call ' Perceptive Centres ' in the 

 Cerebral Hemispheres. Thus, though there may be much 

 and compound overlapping of areas, and though the area 

 pertaining to the impressions of any particular sense in 

 * " Journal of Mental Science," January, 1869. 



