In the Fourth SeSl ion ^ the Author^ in confofmity to the 
Cuftom of thofe that write of FeaverSj difcourfes of the 
Smallpox > and Firfl, examhiing the caufe of this ficknefs 
and its univeriaifty, dehvers his peculiar opinion of the 
blond's endeavouring a Renovation or a New Texture 
( once at leaft in a Mans hfe ) and is ineho'd to preferr the 
fame to the received dodrrine of its malignity. Then, hav- 
ing laid down, for a foundation of the Cure, the two times^ 
of Separation arid Expuljion , he argues as well againft too 
high an Ebullition or too hafty a feparation ( by a hot diet 
or high Cordials) as againft too languid a one (by Blood»» 
ing5 Purge^3 and Cooling medicines,) The hke he does 
to the Time oi Expulfon , farbidding hoth jnfimoderate 
Heat(whereby Nature's expelling operation isdifturbed by 
a precipitated and too thick a crowd of the protruded pu- 
fkuh^) and to0 much Cooling, whereby due Expulfion is 
hindred^ Infliorc, he advifes, to permit Nature to do her 
own work, requ-iring nothing of the Phylician, bur to regu* 
late herp when (lie is exor bitantjand to^forcifie her, when (lie 
is too weak. He concludes alljwith'vdelivering a Model of 
the Method, he would ufe for his own only Son^if he fliould"; 
fallintQ, this. Sicknefs.. . 
Advcrtifcment. 
Wknm 'tis taken notice of, that fever al perfons per-- 
fmde themfelves, that thefe Phiiofophical Tranfaftions 
are puhlijh t bj the Royal Society ^notwithjhnding many 
ctrcumflancesrto be met with in the alreadji publijh t ones^ 
than 
