And even _Agricola_ himself, though the Chymists complain of him as their adversary, acknowledges thus much and more; by telling us that at a Town called _Saga_ in _Germany_,[30] they dig up Iron in the Fields, by sinking ditches two foot deep; And adding, that within the space of ten years the Ditches are digged again for Iron since produced, As the same Metal is wont to be obtain'd in _Elva_. Also concerning Lead, not to mention what even _Galen_ notes, that it will increase both in bulk and Weight if it be long kept in Vaults or Sellars, where the Air is gross and thick, as he collects from the smelling of those pieces of Lead that were imploy'd to fasten together the parts of old Statues. Not to mention this, I say, _Boccacius Certaldus_, as I find him Quoted by a Diligent Writer, has this Passage touching the Growth of Lead. _Fessularum mons_ (sayes he) _in Hetruria, Florentiae civitati imminens, lapides plumbarios habet; qui si excidantur, brevi temporis spatio, novis incrementis instaurantur; ut_ (annexes my Author) _tradit Boccacius Certaldus, qui id compotissimum [Errata: compertissimum] esse scribit. Nihil hoc novi est; sed de eadem Plinius, lib. 34. Hist. Natur. cap. 17. dudum prodidit, Inquiens, mirum in his solis plumbi metallis, quod derelicta fertilius reviviscunt. In plumbariis secundo Lapide ab Amberga dictis ad Asylum recrementa congesta in cumulos, exposita solibus pluviisque paucis annis, redunt suum metallum cum fenore._ I might Add to these, continues _Carneades_, many things that I have met with concerning the Generation of Gold and Silver. But, for fear of wanting time, I shall mention but two or three Narratives. The First you may find Recorded by _Gerhardus_ the Physick Professor, in these Words. _In valle_ (sayes he) _Joachimaca [Errata: Joachimica] argentum gramini [Errata: graminis] modo & more e Lapidibus minerae velut e radice excrevisse digiti Longitudine, testis est Dr. Schreterus, qui ejusmodi venas aspectu jucundas & admirabiles Domi sua aliis saepe monstravit & Donavit. Item Aqua caerulea Inventa est Annebergae, ubi argentum erat adhuc in primo ente, quae coagulata redacta est in calcem fixi & boni argenti._ [Footnote 30: _In Lygiis, ad Sagam opidum; in pratis eruitur ferrum, fossis ad altitudinem bipedaneam actis. Id decennio renatum denuo foditur non aliter ac Ilvae ferrum._] The other two Relations I have not met with in Latine Authours, and yet they are both very memorable in themselves, and as pertinent to our present purpose.