Being thus possessed of this useful Machine, he tells us what wonderful feats he could perform by it, with the Help of _Bellini_’s Doctrine of Fevers, if he had any time to bestow on so _great a Digression_: for he could shew us, _how the Alterations made in the Blood will favour Pestilential Diseases, by rendering the Body obnoxious to them_. Why, this is the Favour we have waited for in eleven tedious Pages; and if he writes in English, we may thus be taught how the Blood is affected in Pestilential Diseases, by laying us a-bed languishing with them. This would not only be one step towards Contagion, as he artfully begins the next Paragraph, but might fully inform us of every thing we want to know concerning it. Why should the Great and Celebrated Dr. _Mead_ call this a Digression? I wish he would begin thus to digress: but it is now too late, since he has already digressed from all his Title-Page, and the half of his Preface. _Contagion_ was dropt at first, and now we find that _Pestilential Contagion_ has no better Fate. How _preventing_ may thrive under his Hands, is not hard to guess, since he knows nothing of what he promises to prevent. These _Methods are very different from those taken in former times among us, and from what they commonly do abroad_. Insomuch, that had any body writ in this Method, besides the Celebrated Doctor, I should have thought him the most ignorant, impertinent, and self-sufficient Person that ever made a Sale of Physick. What Account can he give to Physicians, for thus despising the received Opinions of _Hippocrates_, and of all their learned and experienc’d Predecessors, who unanimously declare, that the Plague differs in nothing from a Fever; or else that a Fever attends every Plague of Pestilence. And, therefore, in him is all Physick, or else he knows nothing of it.