CH. II.] MATERIAL IDEAS. 63 



116. All actions of the material ideas, whether arising directly 

 through the brain, or indirectly through the nerves (115), are 

 extended solely into the sensitive or animal machines (34, 14), 

 which are the brain and nerves only, or they at the same time 

 put mechanical machines into motion. 



117. All actions of the material ideas are therefore : — 1, 

 directly cerebral, and not extended either to the mechanical 

 machines or to the nerves; 2, directly cerebral, but extended 

 to the mechanical machines without the intervention of the 

 nerves ; or 3, cerebral indirectly through the nerves, and in this 

 case, either remain simply in the nerves, so far, at least, as not 

 to affect mechanical machines, or are in fact, extended to the 

 latter at the same time, and move them (115, 116). Now 

 since we have only to consider the actions of the material ideas 

 restricted to the nervous system exclusively (113), they may be 

 arranged under two heads : 



i. The direct cerebral actions of material ideas not extended 

 either to the nerves or to the mechanical machines ; and — 



ii. The indirect cerebral actions of material ideas excited 

 through the nerves, so far as they do not put mechanical ma- 

 chines into motion. 



Actions of Material Ideas in the Brain. 



118. All material ideas are movements in the brain (25); 

 consequently, their actions in animal bodies can be none other 

 than movements; but animal (114) and sentient actions (97), 

 which, when they are not extended beyond the brain, are 

 actions of its own animal- sentient force (114). Now, the latter 

 is no other than the power to produce the material ideas of the 

 conceptions (25, 26) . Further, the direct actions of the material 

 ideas which remain in the brain, and are not extended either 

 to the nerves or to the mechanical machines, are simply other 

 material ideas, which produce other conceptions, and, con- 

 sequently, can be developed in other points of the brain 

 than the first, as is certainly the case with various external 

 sensations (43). 



119. The primary material ideas in the brain, which are pro- 

 duced by either external impressions (31, 32), or by spontaneous 

 conceptions of the mind (27, 114), excite, consequently, of them- 

 selves material ideas of a second kind which are necessary to 



