2% T/ce Carrier's Nezv Guide, Chap. VL ' 



But firil, it will be proper to diftinguifh between a Fever 

 that is Simple, and that which is complicated and accom- 

 panied with fome other Difeafe. ' A fimple Fever confills 

 only in the Increafe of the Blood's Velocity j that is to fay, 

 when it runs more fwiftly through all its Channels than is 

 ufual, but preferves an Uniformity in its Motion : Whereas 

 a complicated Fever has, beiides the Increafe of Motion ia 

 the Blood, feveral other Symptoms ; and thefe Difeafes^. 

 which are Concomitants of fuch Velocity in the Blood, ard 

 often the Caufe of thofe P'evers, 'tn which the Motion of 

 the Blood is not regularly and uniformly augmented, but is. 

 diforderly, admitting of divers Peiiod.s. ■ 



y, p 1 he Blood, as all other Fluids, beinoj 



plained made Up of liquid Parts, is therefore capable 



of being put into a rnoie than ordinary de- 

 gree of Motion, both by external and internal Caufes : 

 When the Caufe happens to be limple and external, as for 

 Inftanccj wl^en the Blood is violently agitated, and put ill 

 Motion by the Heat of the Sun, or by violent and excef- 

 five Exercife, then the Fever will be only fimple : In fuch 

 a Cafe the Blood is melted, and, like Wax, requires more 

 Space in the Veilels, than when in its ordinary State ; and 

 iikevvife as it becomes more thin and fluid, its Motion in- 

 creafes; which is obvious enough, becaufe all thin Liquors 

 wdll move with moreVelcciiy and Swiftnefs than ihofe 

 that are thick ; and becaufe a Liquor that is of a thiri 

 Texture, will pafs through thofe that are more laige, with- 

 out any Oppoilticn ; thcrefoie all fuch Fevers are regular 

 and uniform. But vi hen a Fever proceeds frcm any ill I 

 Quality in the Blood, as for Inftance, if the Blood be too 

 thick or vifcid, io as to occafion Obllructions in thofe 

 Veflels that are the molt minute and fmall, the Blood be- 

 ing obftrudrd there, and meeting with Oppolition, m.uft 

 needs occafion great diforders, while it flov/s in grcnter 

 Qi'antity than ordinary into particular Parts, and while it 

 endeavours to find out proper Vents and Pailages for itfelf. 

 Now in both thefe Cafes, the glandular Difcharges muftj,, 

 in a great Meafure^, be hurt: But in thofe Fevers that arei 

 complicated, fome of thofe Vents may be too much ol>-' 

 flruL^ed, while others are too free and open. And hencel 

 It' is, that Nature b fo much put to it in alJ Fevers; fotl 

 in thofe that are the rpoft fimple, Ihe is overpower'd by 2t, 

 too great quantity cf BJood, occalion'd by a too great Rare- 

 htiiQV,^ whereby it takes up more Space than ufual in all 



the 



