Sup. I. 16.4. THEORY OF FEVER. 5 oi 



would be thus more powerfully excited by the increafed actions 

 of the capillaries ; which exiited in confequence of the weak 

 action of the heart and arteries. This aifo reiembles in fome 

 reipects the continued fevers with weak pulfe, and with increas- 

 ed activity of the capillaries. 



4. When a torpor of fome irritative motions occurs from a 

 previous exhauftion of the fenforial power of irritation by the 

 action of fome very great ftimulus, it is long before any accu- 

 mulation of the fenforial power of irritation is produced ; as is 

 experienced in the ficknefs and languor, which continues a whole 

 day after a fit of drunkennefs. But neverthelefs there occurs 

 an accumulation of the fenforial power of aflbciation in the firfl 

 link of the aifociate train of motions, which is catenated wi.h 

 thefe torpid irritative ones •, which accumulation is owing to de- 

 ficient excitement of that fenforial power in the firil iink of the 

 aflbciate train. This firil link therefore exiils alio in a lefs ac- 

 tive or torpid ftate, but the accumulation of the fenforial power 

 of aflbciation by its fuperabundance contributes to actuate the 

 fecond link of the aflbciate train with unnatural quantity of mo- 

 tion ; and that though its own natural quantity of the power 

 of aflbciation is not excited by the deficient action of preceding 

 fibrous motions. 



"When this happens to the flomach, as after its irritative mo- 

 tions have been much exerted from the unnatural ftimulus of 

 wine, or opium, or of contagious matter mixed with the faliva, 

 a torpor or inactivity of it fucceeds for a greater or lefs length 

 of time ; as no accumulation of the fenforial power of irritation 

 can occur, till the natural quantity, which has been previouily ex- 

 pended, is firil: reftored. Then the heart and arteries, which are 

 next in catenation, become lefs active from the want of fuffi- 

 cient excitement of the fenforial power of aflbciation, which 

 previouily contributed to actuate them. This fenforial power 

 of aflbciation therefore becomes accumulated, and by its fuper- 

 abundance contributes to actuate the link next in aflbciation, 

 which has thus acquired fo great a degree of aflbciability, as to 

 overbalance the lefs quantity of the excitement of it by the tor- 

 pid action of the previous or firil aflbciate link. This happens 

 to the capillaries, when the heart and arteries are affected as 

 above by the torpor of the ftomach, when it is occahoned by 

 previous great expenditure of its fenforial power, and thus con- 

 ftitutes fever with weak pulfe, which is here termed inirricative 

 fever, typhus mitior. 



5. W T hen a deficiency of ftimulus is too great or too long con^ 

 tinued, fo as to impair the life of the pirt, no further accumu- 

 lation of fenforial power occurs ; as when the (kin is long ex- 



poicd 



