io6 DISEASES CLASS I. 2. 4. 2, 



fhuddering and gnafhing the teeth in cold fits of intermittent fe- 

 vers. See Clafs I. 2. 2. i. 



Thirft may be divided into two varieties, alluding to the re- 

 mote caufe of each, and may be termed fitis calida, or warm 

 thirft, and fitis frigida, or cold thirft. The remote caufe of the 

 former arifes from the diflipation of the aqueous parto of our 

 fluids by the increafed fecretion of perfpirable matter, or other 

 evacuations. And hence it occurs in hot fits of fever, and after 

 taking much wine, opium, fpice, fait, or other drugs of the Art. 

 incitantia or fecernentia. The thirft, which occurs about three 

 hours after eating a couple of red herrings, to a perfon unaccui- 

 tomed to falted meat, is of this kind ; the increafed action of the 

 cutaneous veflels diilipates fo much of our fluids by infenfible 

 perfpiration, as to require above two quarts of water to reftore 

 the fluidity of the blood, and to waih the fait out of the fyftem. 

 See Art. III. 2. i. 



M. M. Cold water. Vegetable acids. Warm bath. 



The remote caufe of fitis frigida, or cold thirft, is owing t& 

 the inaction of the cutaneous, pulmonary, urinary, and cellular 

 abforbents ; whence the blood is deprived of the great fupply of 

 moifture which it ought to receive from the atmofphere, and 

 from the cells of the cellular membrane, and from other cyfts ; 

 this caufe of thirft exifts in dropfies, and in the cold fits of inter- 

 mittents. The defire of fluids, like that of folids, is liable to ac- 

 quire periods, and may therefore readily become difeafed by in- 

 dulgence in liquids grateful to the palate. 



Of difeaied thirft, the moft common is either owing to defect 

 of the aft ion of the numerous abforbent veifels on the neck of 

 the bladder, in which the patient makes much paleiih water ; or 

 to the defeclive abforption of the fkin and lungs, in which the 

 patient makes but little water, and that high-coloured, and with 

 fediment. In both the tongue and lips are liable to become very 

 dry. The former in its greateft degree attends diabetes> and the 

 latter anafarca. 



M. M. Warm water, warm wine, warm bath. Opium. 

 Cold bath. Iced water. Lemonade. Cyder. 



2. Efuries. Hunger has been fancifully afcribed to the fides 

 of the ftomach rubbing againft each other, and to the increafed 

 acidity of the gaftric juice corroding the coats of it. If either 

 of thefe were the caufe of hunger, inflammation muft occur, when 

 they had continued fome time , but, on the contrary, coldnefs 

 not heat is attendant on hunger; which evinces, that like third 

 it is owing to the inactivity of the membrane, which is the feat 

 of it ; while the abundant nerves about the cardia ventriculi, 



and 



