CLASS I. i. 5. i. OF IRRITATION. 47 



ORDO I. 



Increnfid Irritation. 



GENUS V. 



With incrcafid Afiions of the Organs afSenfe. 

 SPECIES. 



1. Vifus acrior. Acutcr fight. There have been inltanccs of 

 people, who could ice better hi the gloom of the evening, than' 

 in the (Ironger light of the day ; like owls, and bats, and man? 

 quadrupeds, and flying inlets. When the eye is inflamed, great 

 light becomes eminently painful, owing to the incrcafcd i; 

 tive motions of the retina, and the coniequent incrcafed fcnia- 

 tion. Thus when the eye is dazzled with fuddcn light, the pain 

 is not owing to the motion of the iris ; for it is the Contraction 

 of the iris, which relieves the pain from fudden light \ but to the 

 too violent contractions of the moving fibres, which cunflitute 

 the extremities of the optic nerve. 



2. Audit us acrior. The irritative ideas of hearing are fo in- 

 creafed in energy as to excite our attention. This happens in 

 fome difeafes of the epileptic kind, and in fome fevers. Hence 

 the whifpering of the currents of air in a room, the refpiration 

 of the company, and noiies before unperceived, become trouble- 

 fome ; and founds louder than ufual, or uaexpeded, produce 

 ftarting, and convulfions. 



M. M. Put oil of almonds into the ears. Stop the meatus 

 auditorius with cotton wool. Set the feet of the patient's bed 

 on cufhions, or fufpcnd it by cords from the ceiling. 



3. Olfaclus acrior. The irritative ideas of fmeli from the in- 

 creafed action of the olfaclive nerve excite our attention. Hence 

 common odours are difagreeable ; and are perceived from vari- 

 ety of objects, which were before thought inodorous. Theie 

 are commonly believed to be hallucinations of the fenfe. 



M. M. SnufFftarch up the noftrils. 



4. Gujlus acrior. The irritative ideas of tafte, as of our own 

 faliva, and even of the atmofpheric air, excite our attention 5 and 

 common taites are difagreeably ilrong. 



M. M. Water. Mucilage. Vegetable acids. Scrape the 

 tongue clean. Rub it with a fage-leaf and vinegar. 



5. Tnclus acrior. The irritative ideas cf the nerves of touch 



excite 



