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 3 1 The Caufes and Cure others ^ becaufe what is thus critically thrown off by one, hath a Faculty of ex- citing the like Diforders in the Fluids of another, when it is iniinuated into them ^ as a very fmall Quantity of fbme ferment- ing Subftances will communicate its Effi- cacies a very great Way, and put very great Parcels of Flu'd into the like Agita* tion. And this is the Way by which a malignant Fever comes to be infe&ions, and a Teftilence changes into a Contagion; as Bellini more largely explains it in his XXVIIM? Tropfition of Fevers j from the whole of which, it is manifeft, as Dr. Mead hath expreffed it in his iifth EJJay of Poifons that the Effctls of the one are the Caufe and Be* ginning of the other. T O bring then this nearer to the Mat- ter under Examination, the Plague in 166^ and defcribed by Dr. Hodges, was ftrift- y and properly a Contagion -, and by all Accounts of the beft Authority, That which hath made fuch vaft Devastations in fome Parts of France, and now continues to rage amongft them, to the great Terror of their Neighbours, is alfo of the fame Kind • and was brought to them in Merchandize, and by a Ship's Crew, who were fick of a pefti* lential