Agricola, Georg, De re metallica Libri XII, Quibus Officia, Instrumenta, Machinae, ac omnia ..., 1556
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              <s id="N1B602">At aurum ab argento hac ratione ſecernitur. </s>
              <s id="N1B605">Temperatura primum adie
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              cto plumbo coquatur in catino cinereo uſque dum omne plumbum exhalet,
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              atque eius bes æris tantummodo drachmas quinque, aut ſummum ſex, in ſe
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                tineat</expan>
              : nam ſi plus æris in ipſa fuerit, argentum ab auro ſeparatum mox rur­
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              ſus cum eo coniungitur: tale
                <expan abbr="argentũ">argentum</expan>
              , in quo aurum ineſt, liquatum uel for­
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              metur in globulos bacillo inferius diffiſſo agitatum, uel in canaliculum fer­
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              reum infundatur, & ex refrigerato efficiatur tenuis bractea. </s>
              <s id="N1B61C">Quoniam uerò
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              ratio faciendi globulos ex auro argentoſo acriorem curam & diligentiam
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              quàm ex alijs metallis deſiderat, eam nunc paucis exponam: id primò conij
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              ciendum eſt in catinum: qui deinde operculo tegendus & imponendus eſt
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              in alterum catinum fictilem, modicum cinerem continentem: tum ita ſunt in
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              fornace collocandi, ut ignis, flatu follis, inſpirari poſſit. </s>
              <s id="N1B629">Poſtea eis carbones
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              circundandi ſunt: hisque, ne cadant, lapides uel lateres: mox catino ſuperiori
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              carbones inijciendi ſunt, & eis prunæ ſuperinijciendæ: quibus rurſus carbo
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              nes, ut catinus undique eis circundetur & contegatur: quem ſinere oportet ſe
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              mihora, uel paulo longiore ſpacio carbonibus
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              calefieri: & pro­
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              uidere, ne
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              ijſdem refrigeſcat: poſthæc per follis narem flatus in­
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              ſpirandus eſt, ut aurum incipiat liqueſcere: mox uerſandum, & experimen­
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              to rapto conſiderandum an liquatum ſit. </s>
              <s id="N1B642">Si fuerit liquatum,
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              ad
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              ipſum adiecto catinum rurſus confeſtim operculare conuenit, ne id exha­</s>
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