_Take green_ Vitriol _calcin'd_, Saltpeter, _and_ Sulphur, _of each a pound, beat them well together, and keep it for use_. _In close Rooms, and in hot Weather_, Vinegar _with_ Rue, _or_ Wormwood, _chopt small, and evaporated in a perfuming Pot; or else Pestilential_ Vinegar [as we shall describe] _thrown on a hot Brick. Or take_ Myrrh, Galbanum, Ammoniac, _of each half an Ounce; boyl these in a Quart, or three Pints of_ White-Wine Vinegar, _'till they are all dissolv'd; put half a spoonful of this at a time on a hot Brick_. Some commend Slakeing of _Lime_, supposing the fume that ariseth from it, may purifie the Air: 'Tis possible, if this be done with _Vinegar_, either simple, or impregnated with _Alexipharmacal_ Medicines, it may be more effectual. Next to the Cure of the =Air=, to render that as wholesom as we can; we must arm our selves against taking in that Malignity, which [notwithstanding all means of purifying it] shall still remain mixt with it. Now because the Spirits are commonly the first that receive Infection; We must fortifie them, that they may not easily admit the approaches of their Enemy, which when they are in full vigour and expansion, they will repel, and as it were keep off at a distance; Therefore =Wine= and =Confidence= are a good =Preservative= against the =Plague=: But when the Spirits, through fear, or want of supply, do recede, and are forc'd to give back, the Enemy enters, and first seizeth them, and thence gets into the Blood and Humors; Therefore much =Fasting= and =Emptiness= are =bad=: But every one should Eat and Drink at convenient Hours, in such manner and measure, as may always keep the Spirits lively and chearful, and endeavour to compose his Mind and Affection against fear and sadness. But besides keeping the Spirits in a good height, and more especially when that cannot be done, as in Persons that are naturally fearful, and of a tender Constitution, the Spirits should constantly, as it were, be kept arm'd with such Remedies as resist the Poyson; that is, the use of proper Antidotes against the =Plague=. I shall set down some =Preservatives= to be taken of every Morning, and again at Night, by those that live in infected places. _Take of Conserve of_ Wood-Sorrel _four Ounces_; Confectio Liberans, _and_ Mithridate, _of each half an Ounce; Salt of_ Wormwood _two Drams; Confection of_ Hyacinth _one Dram_; Tormentil _Roots, and fine_ Bole, _of each half a Dram; Pestilential_ Vinegar _half an Ounce; mix all with Syrup of_ Citron; _Take as much as a Nutmeg, Night and Morning_. For the Poorer Sort, that Medicine of the Ancients, may be proper, _viz._ _Take of_ Rue _two handfuls_, Figs _and_ Walnut-Kernels, _of each twenty four, common Salt half an Ounce; Which beat all together in a Mortar, till it be well mix'd; Take of it as much as a Nutmeg every Morning and Night_.