IMPROVED. 5S 



ercife ; I fay, in fuch Cafe, the Fever will be only 

 of the Symptomatick Kind : For in fuch Cafe the 

 Blood is fufed or melted like Wax, and confequent- 

 ly requires more Space in the VefCds, than when 

 in its ordinary State ; and likewife as it becomes 

 more thin and fluid, its Motion increafes, which is 

 obvious enough, by reafon all thin Liquors move 

 with more Swiftnefs, than thofe that are thick. Add 

 to this, the Compreffion the Blood meets with (when 

 in this State) from the Sides of the Veffels, t^c, 

 which is in Proportion to the Degrees of Fufion or 

 Thinnefs. Thefe Kinds of Fevers are regular and 

 uniform : But when a Fever proceeds from any ill 

 Quality in the Blood, as when it is tco vifcid and 

 thick, occafioning Obftru6lions in the Veffels which 

 are fmallert ; 1 fay, the Blood being obftruded there, 

 and meeting with fuch Oppofition, mufl needs oc- 

 cafion great Diforders, efpecially while it flows in a 

 greater Quantity than ordinary into any particular 

 Part of the Body, and while it endeavours to find 

 out proper Vents and Paflages for itfelf. Now in 

 both thefe Cafes, the Glandular Difcharges muii in 

 a great Meafure be hurt. But in complicated Fe- 

 vers, fome of the excretory Dudls or Pipes, by 

 which the Glands difcharge themfelves, may be too 

 open, v/hilft others are obfirufted : And hence it is, 

 that Nature is fo mucji put to it in Fevers of every 

 Species and Denomination ; for in thofe that are 

 moll fimple, fhe is over-power'd by a too great 

 Quantity of Blood, cccafioned by a too great Rare- 

 faftion as aforefaid, whereby it takes more Space in 

 the Veflels than ufual, and moves with fo much 

 Rapidity, as to difcompofe the whole Body. Like- 

 wife in thofe Fevers proceeding from vitiated Blood, 

 fhe is opprefs'd by violent Impulfes and irregular 

 Difcharge?, before the Blood, ^c. can become of 

 fuch a Texture or Make, as to render it fit to pafs 

 equally into all Parts ; and therefore, it is obferve- 

 able, whatever Changes the Blood undergoes in all 

 the different Kinds of Fevers, that fp long as the 

 C 6 Pifeaf^ 



