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ANATOMY OF 



Superior surface of the cerebrum, narrower at the front than at the back ; 

 divided into two hemispheres, and consisting of convolutions. In the cut at 

 p. 3O4. the lobes are seen. 



more secretion, in these respective parts, than there otherwise 

 could be. As an equally beautiful contrivance augments the sur- 

 face of the cerebrum, and of the portion immediately subjacent, we 

 may be certain that the more external parts those portions which 

 are thus rendered more extensive (for the mass is rather diminished 

 by the contrivance) are of the highest importance; and, as the 

 inner surfaces, thus augmented, are all the seat of the functions of 

 the respective organs, we may, perhaps, presume that, in the case 

 of the cerebrum, the seat of chief function is the more superficial 

 portions. Even a little more increase is effected by the summit 

 of many convolutions being depressed. In the same way, the 

 cerebellum is divided into two lobes, and these into sixteen 

 lobules ; the surface of each lobe consists of about sixty plates, 

 standing side by side ; and even in the sides of these are others, 

 secondary, seen only on separating the primary, and amounting, 

 perhaps, to 600 or 700. The purpose must be the same. We 



