5* -ASSOCIATE MOTIONS. SECT. X. i. 



SECT. X. 



OF ASSOCIATE MOTIONS. 



I, i . Many mufcular motions excited by irritations in 

 . trains or tribes become officiated. 2. A W many ideas. 

 II. i. Many fenfitive mufcular motions become af- 

 fociated. ^ And many fenfitive ideas . III. i. Many 

 voluntary mufcular motions become officiated. 2. And 

 then become obedient to fenfation or irritation. 3. 

 And many voluntary ideas become officiated* 



ALL the fibrous motions, whether mufcular or 

 fenfual, which are frequently brought into action 

 together, either in combined tribes, or in fucceflive 

 trains, become fo connected by habit, that when 

 one of them is reproduced the others have a tendency 

 to fucceed or accompany it. 



I. i. Many of our mufcular motions were ori- 

 ginally excited in fucceflive trains, as the contrac- 

 tions of the auricles and of the ventricles of the 

 heart ; and others in combined tribes, as the vari- 

 ous divifions of the mufcles which compofe the calf 

 of the leg, which were originally irritated into fyn- 

 chronous action by the txdium or irkfomenefs of a 

 continued pofture. By frequent repetitions thefe 

 motions acquire affociations, which continue dur- 

 ing our lives, and even after the deftruction of 

 the greateft part of the fenforium ; for the heart 

 of a viper or frog will continue to puifate long 

 after it is taken from the body -, and when it 

 has entirely ceafed to move, if any part of it is 

 goaded with a pin, the whole heart will again re- 

 new its pulfations. This kind of connection we 

 fliall term irritative aflbciation, to diftinguifli it 

 from fenfitive and voluntary aflbciations. 



2. In 



