That it consists of some _Saline Parts_ we are assured by Its Solution in common Water (134); and it is upon the account of These that It does more happily promote the _Flowing_ of Metals than any other _Salt-Pouders_ which the Workmen make use of: Wherefore some have called It a coagulated _Aqua Fortis_. From all this it appears, that Authors do vainly Dispute wherein the Noxious quality of _Arsenick_ resides, since the Case here is plainly much the same with that of _Sublimate Corrosive_; and as the Salts there, together with the Mercurial Particles, do compose pungent _Crystals_, so without all doubt the _Regulus_ of this Mineral gives a like force to the _Saline Bodies_, which without this weight could be but of small Effect. The main difference is, that in _Arsenick_ we have an addition of _Sulphur_, which does not only strengthen the Action of the other Parts, in that as a _Vinculum_ it keeps them united together; but consisting besides of many hot and fiery Corpuscles, promotes the Inflammation of those Wounds which the Crystalline _Spicula_ make in the Membranes of the Stomach. Upon the Score of such a Texture and Make as this, _Arsenick_ makes no Ebullition either with _Alcalies_ or _Acids_ (135); and _as_ the _Regulus_ of It being cleared from most of its Salts, is by much less hurtful than the crude Mineral it self; _so_ on the other Hand, the _Factitious White_, in which there is a much greater Proportion of the Saline to the Metallic Parts, is the most Violent of all the kinds, superiour in Force to _Mercury Sublimate_. The several Histories related by _Wepfer_ (136) do put this out of Question; It is sufficient to our Purpose to mention One. A Dog having eat some Fat mixt with _White Arsenic_, died the next Day; The upper Part of the Stomach, when opened, was red and inflamed, the Coats thinner than ordinary, the bottom of It was covered with a fætid Slime, and some Pieces of Fat; the Thin Guts were so Corroded as to be Pervious in Three Places, Two of the Ulcers so large that they would easily admit a _Bean_. The Cavity of the _Abdomen_ contained a yellowish _Ichor_ tinged with Blood. The Case being thus, one would wonder what should induce Authors to prescribe so Corrosive a Mineral to be worn upon the Pit of the Stomach, as an _Amulet_ against the Plague. This Trick we may well believe to be Dangerous, when _Lionardo di Capo_ (137) tells Us of a Child a kill’d by the Violent Vomiting and Purging, occasion’d from a slight Wound made in the Head by a _Comb_ wet with Oil in which _Arsenick_ had been infused; for the Pores of the Body being opened by Heat and Exercise, some of the Noxious _Effluvia_ may easily Insinuate themselvs into the Part; accordingly _Crato_ (138) observ’d an Ulcer of the Breast caused by this Application; _Verzascha_ (139) Violent Pains, and fainting Fits; _Diemerbrock_ (140), and Dr. _Hodges_ (141), Death it self.