SECT. XX. ii. OF VERTIGO. *St 



ringing, and fometimes a fmging, or buzzing, in 

 the ears, and is occafioned by our firft experiencing 

 a difagreeable fenfation from our not being able 

 diftindly to hear the founds, we ufed formerly to 

 hear diftindly. And this difagreeable fenfation ex- 

 cites defire and confequent volition ; and when we 

 voluntarily attend to fmali indiftinft founds, even 

 the whifpering of the air in a room, and the pulfa- 

 tions of the arteries of the ear are fucceeded by 

 fenfation ; which minute founds ought only to have 

 produced irritative feniuai motions, or unperceived 

 ideas. See Section XVII. 3. 6. Thefe patients 

 after a while lofe this auditory vertigo, by acqui- 

 ring a new habit of not attending voluntarily to 

 thefe indiftinct founds, but contenting themfelves 

 with the lefs accuracy of their fenfe of hearing. 



Another kind of vertigo begins with the diforder- 

 ed action of fome irritative mufcular motions, a 

 thofe of the flomach from intoxication, or from 

 emetics ; or thofe of the ureter, from the ftimulus 

 of a (lone lodged in it ; and it is probable, that 

 the difordered motions of fome of the great con- 

 geries of glands, as of thofe which form the liver, 

 or of the inteftinal canal, may occafion vertigo in 

 confequence of their motions being affociated or 

 catenated with the great circles of irritative moti- 

 ons ; and from hence it appears, that the means of 

 cure mud be adapted to the caufe. 



To prevent fea-ficknefs it is probable, that the 

 habit of fwinging for a week or two before going 

 on (hipboard might be of iervice. For the vertigo 

 from failure of light, fpeclacies may be ufed. For 

 the auditory vertigo, aether may be dropt into the 

 ear to ftimulate the part, or to diffolve ear-wax, if 

 fuch be a part of the caufe. For the vertigo arifing 

 from indigeftion, the peruvian bark and a blifter 

 are recommended. And for that owing to a (tone 



in 





