LECyURE II. ^ 



2dly. If a certain degree of pressure be 

 made upon the brain, both feeling and vo- 

 luntary motion cease whilst it continues and 

 return when it is removed. 



3dly. As we have evidence that the 

 perceptions and intellect of animals in- 

 crease in proportion as the brain becomes 

 larger and more complex, so we have 

 reason to conclude that these faculties 

 are connected with that part of the nerv- 

 ous system. 



4thly. The conviction which we gene- 

 rally though not constantly experience, that 

 feeling exists in the part which receives 

 impressions, is shown to be deceptive by 

 the following facts. If a nerve be irritated 

 midway between the brain and its extre- 

 mities, severe pain is supposed to be felt 

 in those extremities; and if it supplies 

 muscles, those muscles become convulsed. 

 Thus when a disease forms about the hip 

 joint, or in the loins, many persons have 

 applied poultices to their knees, from a 

 conviction that as the pain was felt in the 



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