Class I. i. 3. 1, OF IRRITATION. 29 



ORDO I, 



Increafed Irritation. 



GENUS III. 



With increafed Aclions of the Ahforbent SyJIem, 



These are not attended with fo great increafe of heat as in the 

 former genus, becaufe the fluids probably undergo lefs chemical, 

 change in the glands of the abforbent fyftern ; nor are the glands 

 of the abforbent veflels fo numerous or fo extenfive as thoie of 

 the fecerning ones. Yet that fome heat is produced by the in- 

 creafed action of the abforbents appears from the greater gener- 

 al warmth of the fkin and extremities of feeble patients after the 

 exhibition of the peruvian bark, and other medicines of the arti- 

 cle Sorbentia. 



SPECIES. 



1. Lingua arida. Dry tongue occurs in thofe fevers, where 

 the expired air is warmer than natural -, and happens to all thofe, 

 who fleep with their mouths open ; the currents of air in refpi- 

 ration increafing the evaporation. There is alfo a drynefs in 

 file mouth from the increafed action of the abforbent veflels, 

 when a floe or a crab-apple is mafticated ; and after the perfpi- 

 ration has been much increafed by eating fait or fpice, or after 

 pther copious fecretions ; as after drunkennefs, cathartics, or 

 fever fits, the mucus of the mouth becomes vifcid, and in fmali 

 quantity, from the increafed abforption, adhering to the tongue 

 like a white {lough. In the diabetes, where the thirft is very 

 great, this flough adheres more pertinacioufly, and becomes black 

 or brown, being coloured after a few days by our aliment or 

 drink. The infpiflated mucus on the tongue of thofe, who fleep 

 with their mouths open, is fometimes reddened as if mixed with 

 blood, and fometimes a little blood follows the expuition of it 

 from the fauces owing to its great adhefion. When this mucus 

 adheres long to the papillae of the tongue, the faliva, which it 

 contains in its interftices, like a fponge, is liable to become pu- 

 trid, and to acquire a bitter tafte, like other putrid animal fub- 

 ftances ; which is generally miftaken for an indication of the 

 prefence of bile. 



M. M. Warm fubacid liquids. See Clafs I. 2. 5. 8. 



2. Fauces arid*. Dry throat. The expuition of a frothy 



mucus 



