SECTION III. Of the primary Seat of a Peftilence ; where$ by the Way, is confidered the Nature of the Spirits, and their Infection in an humane Body from Poifon* IN Order to put an End to the Con- troverfies about the Seat of a Peftilence^ which have from Antiquity even to this Day been warmly maintained, many Au- thors putting the Heart for the Principle of Life and Death, fome the Brain, and others the Stomach, Lungs, or Liver: It will be necelTary here to difcover the im- mediate Refidence of the pefKlential Semi- mum : Since therefore the above-mentioned Aura, according to Hyfothefis, is very fubtile and lphituous, for that Reafon there muft neceffarily be lome conformable Pro- perty in the Matter which is fit to receive it ^ as therefore there is not in the whole humane Machine any Subjeci more appo- fite, and capable of its Union, than the ani- mal Spirits, we muft fix its Refidence there. But becaufe I am fenfible what Objections this Opinion lies open to, with fome Per- fbns, who may not conceive how an im- mediate
