( S69 ) 
Air, which have produced as many ffecies of Epideitiica! Difeafes 
and Feavers feverally named. 
Of thefe he calls the Jirfi the Cmtimal DepraUry Feaver , laft» 
ing from 1 66 1 to 1 665, which he efteems to be the principal Fea- 
ver of Ndturcj forafmiich as therein ilie doth fo regulate all the 
Symptoms, as to difpcfe the Febrile matter 5 when duly digefted 
and prepared, to be difcharged either by a competent fvveat era 
liberal tranfpiration. Here he records divers important Obfer- 
vatioiis of bis, and notes the feveral fympto^s of the Difeafe, the 
Method of cure^and the Diet of his Patienr,both during the Difeafe 
andafcerit ; concluding this Head with defcribing the nature/jni» 
ptoms and cure of the Inferminef^t Feavers bred in this firft Con- 
ititution. 
The Epidemical Conftitution of another kind he obfcrves 
to have been in Li';^^/^?^ in the years 1665 and 1666. This kind he 
calls inflammatory^ of which nature the Plague or Peftilence was in 
the higheft degree, fweeping away, when it was in its height, 8000 
inoneweek, moreorlefs. Here he takes notice , that for rtn- 
dring a rational account both of fuch wafting Difeafes as this, aod 
of fuch that are very gentle, it may be fuppofed,that fame:imes the 
conftitution of the body of the Air is fuch that it breeds Difeafes 
that carry away innumerable People ; at other times it affiifts but 
a very final nwmber of tl^em ; though it be yet very obfcure to us, 
wherein that different texture of Air, that hath fuch different ef- 
fe<a:s, doth eonfift. 
Now of this fecend fort he very particularly defcribes alfo the 
feveral fymptoms, and the difficultitsoccurring in refpedof thofe 
Phyficians that advifeandufer<f;?<^-/^(5?/V;^ in the Plague r Where 
he relates a ftrange exatijple of the good fuccefs thereof here in 
England \ as alfo his own ufe of bleeding in this diftemper for a 
whiie,^ogether with his reafon of defiftingfrom it, and the method 
by him employ 'd afterwards, and the fuccefs ttiereofi 
The third Epidemical Conftitution, defcribed by him, did ob- 
tain in the years 1 6 67, 1 668, and part of 1669^' a^^d it was that of 
the Small pecks^ arid of a Variolous YtzvtT^ refembling (except the 
eruption of the puftuls) the SmaJ-pocks, in fvanptoms and dura- 
tion, and vanifiiing with the Small-pocks. This was accompanied 
with aD/>rto,efpecially at th6 later end of it j& it^approached fo 
near the nature of the Small'-pocks,that it ftem'd c6 be nothing e! fe, 
Eeee 2 but 
