OF VERTIGO. SECT, XX, . 



SECT. XX. 



OF.VLRT1GO. 



r .iteirjj- t a^jds* Js<r;:,i::-> i 

 I. We determine our perpendicularity by the apparent 

 motions of objects. A 'per > on hood-winked cannot 

 walk in a flraight line. Dizzinefi on looking from 

 a low er, in a room Jluined with uniform lozenge s^ 

 on riding over fnow. 2. Di^zinefs from moving 

 objefts. A whirling 'wheel. Fluff nations of a river. ' 

 ^Experiment with a child. 3. Bizzincfs from our own 

 . motions and thofe of other objects. Riding over a 

 .broad ftr earn. Sea-Jicknefs* 5. Of turning round 

 .on me foot. Dervifes- in Turkey. Attention of tie 

 ,mind prevents flight fea~ftcknefs. After a voyage 

 ideas of vibratory motions are ft ill perceived onjhore. 

 6. Ideas continue fome time after they are excited. 

 Circumftances of turning on one foot, Jlanding on a 

 tower i and walking in the dark, explained. 7. /r- 

 ritative ideas of apparent motions. Irr it alive ideas 

 of founds \ Battement of the found of bells and 

 organ-pipes. Vertiginous noife in the head. Irri~ 

 tative motions of the flomach, intejHnes, and glands. 

 8. Symptoms thai accompany vertigo. Why vomit- 

 ing comes on in ftrokes of the palfy. By the motion 

 ef a fbip. By injuries on the head. Why motion 

 wakes fjck people vomit. 9.. Why drunken people 

 are vertiginous. Why ajlone in the ureter, or bile- 

 duff\ produces vomiting, i o. Why after a voyage 

 ideas of vibratory motions are perceived on Jborc. 

 1 1 . Kinds of vertigo and their cure. 1 2. Definition 

 of vertigo. 



*f*'jii. '''"**&.'''': 



T. IN learning to walk fre judge of the difta-mres 

 of the objeds, which we approach^ by the eye;, 

 and by obferving^their perpendicularity determine 



our 



