408 DISEASES CLASS IV. 2. 1. 13. 



great expenditure of sensorial power by the stomach, and its 

 nearest associated motions, the more distant ones, as those of vi- 

 sion, become imperfectly exerted. From hence may be deduced 

 the necessity of exhibiting wine in fevers with weak pulse, in only 

 appropriated quantity; because if the least intoxication be in- 

 duced, some part of the system must act more feebly from the 

 unnecessary expenditure of sensorial power. 



13. Vertigo febriculosa. Vertigo in fevers either proceeds 

 from the general deficiency of sensorial power belonging to the 

 irritative associations, or to a greater expenditure of it on some 

 links of the trains and tribes of associated irritative motions. 

 There is, however, a slighter vertigo attending all people, who 

 have been long confined in bed, on their first rising; owing to 

 their having been so long unused to the apparent motions of ob- 

 jects in their erect posture, or as they pass by them, that they 

 have lost in part the habit of balancing themselves by them. 



14. Vertigo cerebrosa. Vertigo from injuries of the brain, 

 either from external violence, or which attend paralytic attacks, 

 are owing to the general deficiency of sensorial power. In these 

 distressful situations, the vital motions, or those immediately ne- 

 cessary to life, claim their share of sensorial power in the first 

 place, otherwise the patient must die; and those motions, which 

 are less necessary, feel a deficiency of it, as these of the organs of 

 sense and muscles; which constitute vertigo; and lastly, the vo- 

 luntary motions, which are still less immediately necessary to 

 life, are frequently partially destroyed, as in palsy; or totally, as 

 in apoplexy. 



15. Murmur aurium vertiginosum. The vertiginous murmur 

 in the ears, or noise in the head, is compared to the undulations 

 of the sound of bells, or to the humming of bees. It frequently 

 attends people about sixty years of age; and like the visual ver- 

 tigo described above, is owing to our hearing less perfectly from 

 the gradual inirritabilUy of the organ on the approach of age; 

 and the disagreeable sensation of noise attending it, is owing to 

 the less energetic action of these irritative motions; which not 

 being sufficiently distinct to excite their usual associations, be- 

 come succeeded by our attention, like the indistinct view of the 

 apparent motions of objects mentioned in Vertigo visualis. This 

 may be better understood, from considering the use which 

 blind men make of these irritative sounds, which they have 

 taught themselves to attend to, but which escape the notice of 

 others. The late blind Justice Fielding walked for the first 

 time into my room, when he once visited me, and after speak- 

 ing a few words, said, "This room is about 22 feet long, IS 



