X. 8. OF VERTIGO. 77 



familiar of thofe founds, which have a confidera^ 

 ble battement, the vertiginous patients, who at- 

 tend to the irritative circles of founds above de- 

 fcribed, generally compare it to the noife of 

 bells. 



The periftaltic motions of our ftomach and in- 

 teftines, and the fecretions of the various glands, 

 are other circles of irritative morions, fome of them 

 more or lefs complete, according to our abftinence 

 or fatiery. 



So that the irritative ideas of the apparent motions 

 of objects, the irritative battements of founds, and 

 the movements of our bowels and glands compofe 

 a great circle of irritative tribes of motion: and 

 when one confiderable part of this circle of motions 

 becomes interrupted, the whole proceeds inconfu- 

 fion, as defcribed in Seftion XVII. i. 7. on Catena- 

 tion of Motions, 



8. Hence a violent vertigo, from whatever caufe 

 it happens, is generally attended with undulating 

 noife in the head, perverfions of the motions of the 

 ftomach and duodenum, unufual excretion of bile 

 and gaftric juice, with much pale urine, fometimes 

 with yellownefs of the (kin, and a difordered fecre- 

 tion of almoft every gland of the body, till at 

 Jength the arterial fyftem is affected, and fever fuc- 

 ceeds. 



Thus bilious vomitings accompany the vertigo 

 occafioned by the motion of a (hip ; and when the 

 brain is rendered vertiginous by a paralytic affection 

 of any part of the body, a vomiting generally 

 enfues, and a great difcharge of bile : and hence 

 great injuries of the head from external violence 

 are fucceeded with bilious vomitings, and fome- 

 times with abfcefles of the liver. And hence, 

 when a patient is inclined to vomit from other 

 caufes, as in fome fevers, any motions of the at- 

 tendants in his room, or of himfelf when he is 



raifed 



