So that I make no Question, but that Animals in this Place do instead of Air inspire _Mineral Fumes_, that is, a thin watery Vapour, impregnated with such Particles as do, when united together, compose solid and heavy Masses; which is so far from helping the Course of the Blood thro’ the _Lungs_, that it rather expels the Air out of the _Vesiculæ_, and straitens the Passage of the Blood Vessels, by its too great Gravity; whereupon the _Bladders_ are relaxed and subside, and the Circulation is immediately Interrupted. But if the Animal be in time removed out of this _Steam_, that small Portion of Air which does after every Exspiration remain in the _Vesiculæ_, may be powerful enough to drive out this Noxious Fluid; especially if the Head of the Creature be held downwards, that so its Gravity may forward its Expulsion; or It be thrown into Water, which by assisting, upon the account of its Coldness, the Contraction of the Fibres, promotes the retarded Circle of the Blood; as we every Day experience in a _Deliquium Animi_, or Swooning Fit. Tho’ if this Stagnation be continued too long, no Art can renew Life, no more than in One perfectly strangled; nor will the _Lake of Agnano_ it self be of any Service; which shews that there is no singular Virtue in That Water beyond any other; nor is it, as some have fondly Imagin’d, a Peculiar Antidote to the Poison of the _Grotta_. The bad Effects of such _Fumes_ as This will be the more certain, because the inspired Mineral Particles twitch and irritate the Membranes, which are hereupon contracted to that Degree, as not to be able to recover their Tone, and so the Force and Action of the _Lungs_ is quite lost. It appears from all This not to be at all necessary to make any farther Enquiry into the particular Nature of these Mineral Particles, since they do in this Case act chiefly by their _Gravity_, which is common to ’em all. Tho’ indeed the _Greenish_ Colour of the Earth, together with its _Subacid_ Taste, very much (as _L. di Capoa_ observes) like to that of the _Phlegm_ of _Vitriol_, seem to declare them, if not altogether, yet principally at least, to be _Vitriolick_.