The Poles wash the impure lead from venae dllatatae in a trough ten feet long , three feet wide , and one and one - quarter feet deep . It is mixed with moist earth and is covered by a wet and sandy clay , and so first of all the clay , and afterward the ore , is dug out . The ore is carried to a…
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![An illustration from Omnia D. And. Alciati emblemata : ad quae singula, praeter concinnas acutásque inscriptiones, lepidas & expressas imagines, ac caetera omnia, quae prioribus nostris editionibus cúm ad eorum distinctionem, tum ad ornatum & correctionem adhibita continebantur, : nunc primùm perelegantia persubtiliáq[ue] adiecta sunt epimuthia, quibus emblematum amplitudo quaecunq[ue] in iis dubia sunt aut obscura, tanquam perspicuis illustrantur (1566)](https://img.insideoutlibrary.com/img/200/ia-omniadandalciat00alci-132-122.webp)
![An illustration from Georgii Agricolae De re metallica : libri XII. Quibus officia, instrumenta, machinae, ac omnia deni[que] ad metallicam spectantia, non modo luculentissimè describuntur, sed & per effigies, suis locis infertas, adiunctis latinis, germanicis [que] appellationibus ita ob oculos ponuntur, ut clarius tradi non possint. ; Eiusdem De animantibus subterraneis liber, (1556)](https://img.insideoutlibrary.com/img/200/ia-gri_000033125008455038-46-11.webp)
