364 DISEASES Class IV. i. u 



part becomes increafed by the accumulation of fenforial power 

 during its previous torpor, or by increafe of ftimulus, the actions 

 of the fecond part of it likewife become increafed by direct fym- 

 pathy. 



In moderate hunger the fkin is pale, as before dinner, and in 

 moderate ficknefs, as no great accumulation of fenforial power 

 has commenced ; but in violent hunger, and in greater torpor of 

 the ftomach, as from contagious matter, the accumulation of 

 fenforial power becomes fo great as to affect the arterial and 

 capillary fyftem, and fever is produced in both cafes. 



In contagious fevers with arterial debility commencing with 

 torpor of the ftomach, why is the action of the heart weakened, 

 and that of the capillaries increafed ? Is it becaufe the mobility 

 of the heart is lefs than that of the ftomach, and the mobility of 

 the capillaries greater ? Or is it becaufe the aflbciation between 

 the mufcular fibres of the ftomach and thofe of the heart have 

 been uniformly afTociated by direcl: fympathy ; and the capilla- 

 ries of the ftomach and thofe of the fkin have been more fre- 

 quently afTociated by reverfe fympathy ? 



Where the actions of the ftomach have been previoufly ex- 

 haufted by long ftimulus, as on the day after intoxication, little 

 or no accumulation of fenforial power occurs, during the tor- 

 por of the organ, beyond what is required to replace the defi- 

 ciency of it, and hence fever feldom follows intoxication. And 

 a repetition of the ftimulus fomethartes becomes necefTary even to 

 induce its natural action, as in d^am-drinkers. 



Where there has been no /previous exhauftion of fenforial 

 power, and the primary liny of aflbciate motions is violently 

 actuated by the fenforial pow/er of fenfation, the fecondary link 

 is alfo violently actuated by direct- fympathy ; as in inflammato- 

 ry fevers. Where however the fenforial power of the fyftem is 

 lefs than natural, the feconiary link of afTociated motions be- 

 comes torpid by reverfe fympathy, as in the inoculated fmall-pox 

 during the eruption on the face the feet are frequently cold. 



G„ AJJoc'iatkns affe&ed four Ways. 



Hence afTociated trains or circles of motions may be affected 

 tour different ways. i. By, the greater or lefs energy of action 

 of the iirft link with which they are catenated, and from which 

 they take their names •, as irritative, fenfitive, or voluntary afib- 

 ciations. 2. By being excited \y two or more fenforial powers 

 at the fame time, as by irritationNand afibciation, as in the in- 

 itance of the application of the ftimulus of increafed external 

 heat to the cutaneous capillaries. 3. By catenation with other 



fenforial 



