Class IV. i. 3. 1. OF ASSOCIATION. 393 



ORDO I. 



Increafed Ajjociate Motions. 



GENUS III. 



Catenated with Voluntary Motions. 



SPECIES. 



1. Degluiitio invita. When any one is told not to fwal* 

 low his faiiva, and that efpecially if his throat be a little fore, 

 he finds a necefiity of immediately fwallowing it ; and this 

 the more certainly, the more he voluntarily endeavours not to 

 do fo. 



In this cafe the voluntary power exerted by our attention to 

 the pharynx renders it more fenfible to irritation, and therefore 

 occafions it to be more frequently induced to fwallow the faii- 

 va. Here the irritation induces a volition to fwallow it, which 

 is more powerful than the defire not to fwallow it. See XXIV. 

 1. 7. So in reverie, when the voluntary power was exerted 

 on any of the fenfes, as of fight or tafte, the objects of thofe 

 fenfes became perceived ; but not otherwife. Sett. XIX. 6* 

 This is a troublefome fymptom in fome fore throats. 



M. M. Mucilage, as fugar and gum arabic. 



Warm water held in the mouth frequently, a fomentation to 

 the inflamed throat. 



2. Niclitatio invita. Involuntary winking with the eye-lids, 

 and twitchings of the face, are originally induced by an en- 

 deavour to relieve fome difagreeable fenfations about inflamed 

 eyes, as the dazzling of light ; and afterwards thefe motions be- 

 come catenated with other motions or fenfations, fo as not to be 

 governed by the will. Here the irritation firft produces a vo- 

 l>ion to wink, which by habit becomes ltronger than the anti- 

 vc- ion not to wink. 



Tills fubjecl is rendered difficult from the common accepta- 

 tion of the word, volition, including previous deliberation, as 

 well as the voluntary exertion, which fucceeds it. In the voli- 

 tions here fpoken of there is no time for deliberation or choice 

 of objects, but the voluntary act immediately fucceeds the fen- 

 fatiou which excites it. 



M. M. Cover the aiFecled parts with a flicking plafter or a 

 blifier. Pafs a fine needle and thread through a part of the 

 fkin over the mufcle, which moves, and attach the other end of 



Vol. IL Cc« ths 



