Having thus spoken of the Loadstone and Bodies Magnetical, I shall in the next place deliver somewhat of Electrical, and such as may seem to have attraction like the other. Hereof we shall also deliver what particularly spoken or not generally known is manifestly or probably true, what generally believed is also false or dubious. Now by Electrical bodies, I understand not such as are Metallical, mentioned by _Pliny_, and the Ancients; for their Electrum was a mixture made of Gold, with the Addition of a fifth part of Silver; a substance now as unknown as true _Aurichalcum_, or _Corinthian_ Brass, and set down among things lost by _Pancirollus_. Nor by Electrick Bodies do I conceive such only as take up shavings, straws, and light bodies, in which number the Ancients only placed _Jet_ and _Amber_; but such as conveniently placed unto their objects attract all bodies palpable whatsoever. I say conveniently placed, that is, in regard of the object, that it be not too ponderous, or any way affixed; in regard of the Agent, that it be not foul or sullied, but wiped, rubbed, and excitated; in regard of both, that they be conveniently distant, and no impediment interposed. I say, all bodies palpable, thereby excluding fire, which indeed it will not attract, nor yet draw through it; for fire consumes its effluxions by which it should attract. Now although in this rank but two were commonly mentioned by the Ancients, _Gilbertus_ discovereth many more; as _Diamonds_, _Saphyrs_, _Carbuncles_, _Iris_, _Opalls_, _Amethysts_, _Beril_, _Crystal_, _Bristol-stones_, _Sulphur_, _Mastick_, hard _Wax_, hard _Rosin_, _Arsenic_, _Sal-gemm_, _Roch-Allum_, common Glass, _Stibium_, or Glass of _Antimony_. Unto these Cabeus addeth white Wax, _Gum Elemi_, _Gum Guaici_, _Pix Hispanica_, and _Gipsum_. And unto these we add _Gum Anime_, _Benjamin_, _Talcum_, _China-dishes_, _Sandaraca_, _Turpentine_, _Styrax Liquida_, and _Caranna_ dried into a hard consistence. And the same attraction we find, not onely in simple bodies, but such as are much compounded; as in the _Oxycroceum_ plaister, and obscurely that _ad Herniam_, and _Gratia Dei_; all which smooth and rightly prepared, will discover a sufficient power to stir the Needle, setled freely upon a well-pointed pin; and so as the Electrick may be applied unto it without all disadvantage.