Sup. I. 3. 12. THEORY OF FEVER. 471 



with weak pulfe ; which is exerted on the cutaneous and pul- 

 monary capillaries, fo as to excite them into increafed action 

 for many weeks, and yet no fuch exuberance of fenforial power 

 produces fever in winter-ileeping animals, or in chlorous, or 

 apepfia, or hyfteria ? 



In winter-fleeping animals I fuppofe the whole nervous fyf- 

 tem is torpid, or paralyfed, as in the fieep of frozen people 5 

 and that the ftomach is torpid in confequence of the inactivity 

 or quiefcence of the brain ; and that all other parts of the body, 

 and the cutaneous capillaries with the reft, labour under a fim- 

 ilar torpor. 



In chlorofis, I imagine, the actions of the heart and arteries, 

 as well as thofeof the cutaneous and pulmonary capillaries, fuf- 

 fer along with thofe of the ftomach from the deficient ftimulus 

 of the pale blood ; and that though the liver is probably the feat 

 of the original torpor in this difeafe, with which all other parts 

 fympathize from defect of the excitation of the fenforial power 

 of aflbciation ; yet as this torpor occurs in fo fmall a degree as not 

 to excite a fhuddering or cold fit, no obfervable confequences are 

 in general occafioned by the confequent accumulation of fenfori- 

 al power. Sometimes indeed in chlorofis there does occur 

 a frequent pulfe and hot fkin ; in which circumftances I fup- 

 pofe the heart and arteries are become in fome degree torpid by 

 direct fympathy with the torpid liver ; and that hence not on- 

 ly the pulfe becomes frequent, but the capillaries of the fkin act 

 more violently by reverfe fympathy with the heart and arteries, 

 owing to the accumulation of the fenforial power of aflbciation 

 in them during their torpid ftate, as occurs in irritative fever. 

 See Article 11. of this Supplement. 



In apepfia chronica the actions of the ftomach are not fo far 

 impaired or deftroyed as totally to prevent the excitation of the 

 fenforial power of aflbciation, which therefore contributes, fome- 

 thing towards the actions of the heart and arteries, though lefs 

 than natural, as a weak pulfe always I believe attends this dif- 

 eafe. 



There is a torpor of the ftomach, and of the upper part of 

 the alimentary canal in hyfteria, as is evident from the retro- 

 grade actions of the duodenum, ftomach, and cefophagus, which 

 conftitute the globus hyftericus, or fenfation of a globe riling in- 

 to the throat. But as thefe retrograde actions are lefs than thofe, 

 which induce ficknefs or vomiting, and are not occafioned by 

 previous exhauftion of the fenforial power of irritation, they do 

 not fo totally prevent the excitement of the fenforial power of 

 aflbciation, as to leflen the motion of the heart and arteries fo 

 ivnich as to induce fever 5 yet in this cafe, as in apepfia, and in 



»rofi-s, 



