3 o2 DISEASES Sect. XXXII. 10. \l 



not much fubject either to irritation or to other kinds of aiTo- 

 ciations befides the voluntary ones, except indeed when they 

 are excited by the lafh of ilavery. 



In thefe vafcular mufcles, which are fubject to perpetual ac- 

 tion, and thence liable to great accumulation of fenforial power 

 during their quielcence from want of fiimulus, a great increafc 

 of activity occurs, either from the renewal of their accuftomed 

 fiimulus, or even from much lefs quantities of fiimulus than ufu- 

 al. This increafc of action conflitutes the hot hi of fever, • 

 which is attended with variousjncreafed fecretions, with great 

 concomitant hear, and general uneafinefs. The uneafinefs at- 

 tending this hot paroxyfm of fever, or fit of exertion, is very dif- 

 ferent from that, which attends the previous cold fit, or fit. of • 

 quiefcence, and is frequently the caufe of inflammation, as in 

 pleurify, which is treated of in the next fection. 



A fimilar effect, occurs after the quiefcence of our organs of 

 fenfe ; thofe which are not fubjecl; to perpetual action, as the 

 tafte and fmell, are lefs liable to an exuberant accumulation of 

 fenforial power after their having for a time been inactive ; but 

 the eye, which is in perpetual action during the day, becomes 

 dazzled, and liable to inflammation after a temporary quiefcence. 



Where the previous quiefcence has been owing to a defect of 

 fenforial power, and not to a defect of hamulus, as in the irrita- 

 tive fever with weak pulfe, a fimilar increafe of activity of the 

 arterial fyflem fucceeds, either from the ufual fiimulus of the 

 blood, or from a fiimulus lefs than ufual ; but 36 there is 

 general in thefe cafes of fever with weak pulfe a deficiency of 

 the quantity of the blood, the pulfe in the hot fit is weaker than 

 in health, though it is ftronger than in the cold fit, as explained 

 in No. 2. of this fection. But at the fame time in thofe fevers, 

 where the defect of irritation is owing to the defect of the 

 quantity of fenforial power, as well as to the defect of fiimulus, 

 another circumftance occurs ; which confifls in the partial dif- 

 tributton of it, as appears in partial flufhings, as of the face or 

 bofom, while the extremities are cold ; and in the increafe of 

 particular fecretions, as of bile, faliva, infenfible perfpiration, 

 with gre^t heat of the fkin, or with partial fweats, or diarrhoea. 



There are alfo many uneafy fenfations attending thefe in- 

 creafed actions, which like thofe belonging to the hot fit of fe- 

 ver with itrong pulfe, are frequently followed by inflammation, ■ 

 as in fearlet fever j which inflammation is neverthelefs accom- 

 panied with a pulfe weaker, though quicker, than the pulfe du- 

 2 remiffion or intermiffion of the paroxyfms, though 

 ilronger than that of the previous cold fit. 



From hence I conclude, that both the cold and hot fits of fe- 

 ver 



