34 ASSOCIATE Sect. X. i. i. 



SECT. X. 



OF ASSOCIATE MOTIONS. 



I. I. Many mufcular motions excited by irritations in trains of 



tribes become affiociated. 2. And many ideas. II. i. Many 



fenfiiive mufcular motions become officiated* 2. And many fen- 



Jitive 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 fuccelfivc trains, become fo connected by habit, that 

 when one of them is reproduced the others have a tendency to 

 fucceed or accompany it. 



1. 1. Many of our mufcular motions were originally excited 

 in fucceflive trains, as the contractions of the auricles and of 

 the ventricles of the heart •, and others in combined tribe?, as 

 the various divifions of the mufcles which compofe the calf of 

 the leg, which were originally irritated into fynchronous action 

 by the tedium or irkfomenefs of a continued pofture. By fre- 

 quent repetitions thefe motions acquire aflbciations, which con- 

 tinue during 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 pulfate 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 renew its pulfa- 

 tions. This kind of connexion we (hall term irritative aflbcia- 

 tion, to diftinguim it from fenfitive and voluntary aflbciations. 



2. In like manner many of our ideas are originally excited in 

 tribes ; as all the objects of fight, after we become fo well ac- 

 quainted with the laws of vifion, as to diitinguifh figure and dis- 

 tance as well as colour ; or in trains, as while we pafs along the 

 objects that furround us. The tribes thus received by irritation 

 become affbeiated by habit, and have been termed complex ideas 

 by the writers of metaphyfics, as this book, or that orange. The 

 trains have received no particular name, but thefe are alike af- 

 fociations of ideas, and frequently continue during our lives. 

 So the talte of a pine-apple, though we eat it blindfold, recalls 

 the colour and fnape of it ; and we can fcarcely think on folidi- 

 ty without figure. 



II. 1. Ey the various efforts of our fenfations to acquire or 

 •id their objects, many mufcles are daily brought into fuccef- 



five 



