3-4 ASSOCIATE SECT. X. i. i. 



SECT. X. 



OF ASSOCIATE MOTIONS. 



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

 tribes become officiated. 2. And many ideas. II. I. Many 

 fenfitive mufcular motions become ajjociated. 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 ajjociated. 



ALL the fibrous motions, whether mufcular or fenfual, which 

 are frequently brought into adion together, either in combined 

 tribes, or in fucceflive trains, become fo connedted by habit, that 

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

 fucceed or accompany it. 



1. i. Many of cur mufcular motions were originally excited 

 in fucceflive trains, as the contra6lions of the auricles and of 

 the ventricles of the heart ; and others in combined tribes, as 

 the various divifions of the mufcles which compofe the calf of 

 the leg, which were originally irritated into fynchronous a&ion 

 by the txdiurn or irkfomenefs of a continued poflure. By fre- 

 quent repetitions thefe motions acquire affociations, which con- 

 tinue during our lives, and even after the deflruftion of the 

 greater! 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 afTocia- 

 tlon, to diitinguiuh it from fenfitive and voluntary aflbciations. 



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

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

 quainted with the laws of vifion, as to clillinguim figure and dif- 

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

 objedls that furround us. The tribes thus received by irritation 

 become aiTociated 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- 

 ibciations of ideas, and frequently continue during our lives. 

 So the tafle of a pine-apple, though we eat it blindfold, recals 

 the colour and fhape of it j and we can fcarcHy think on folidity 

 without figure. 



II. i. By the various efforts of our fenfations to acquire or 

 avoid -their objects, many mufcles are daily brought into fuccef- 



five 



