Cardano, Girolamo, De subtilitate, 1663

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    <archimedes>
      <text>
        <body>
          <chap>
            <p type="main">
              <s id="s.004339">
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              diebus, dum caniculæ ſydus torret terras
                <lb/>
              perpetuò miſcendo, agitandóque permiſ­
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              cueris, vermicularem habebis ab initio mel­
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              lis habentem craſſitudinem, æruginis au­
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              tem colorem, ſed longè ſplendidiorem: detra­
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              cta verò è vaſe, atque tabulæ impoſita, for­
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              matáque in vermiculorum ſimilitudinem,
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              vnde nomen ſumpſit, etiam æruginis ſub­
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                <arrow.to.target n="marg584"/>
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              ſtantiam acquiret. </s>
              <s id="s.004340">Cæruleum fit ſic: In fer­
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              reum vas aceti acerrimi pondo tria infunde,
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              ſed prius in eo ſalis Ammoniaci
                <expan abbr="qualiſcunq;">qualiſcunque</expan>
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              vnciæ quadrantem diſſolue, inde bracteas
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              tenues argenti, vnicuique perforatis paruis
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              foraminibus, ac viuo argento oblitas bacu­
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              lo innecte, ipſum baculum ita ſuſpende ſu­
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              per vas, ne multum abfit ab aceto, nec ta­
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              men tangat illud: inde omnia fimo equino
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              calidiore contege: poſt 20. dies ex argento
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              cæruleum detrahes, inde repone rurſus: & ſi
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              opus eſt, argento obline argenti bracteas:
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              & poſt alios 20. dies, quod collectum cæ­
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              rulei fuerit, erades: repete hoc ſæpius: tan­
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              dem quicquid ex cæruleo collectum fuerit
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              in vas prius argenti ſpuma, lithargyrium
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              vocant, oblitum coniice, & paululùm
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              torreto: inde refrigeratum fontis aqua el­
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              uito, vt puluis abſcedat, ſiccatóque in
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              Sole.
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              </s>
            </p>
            <p type="margin">
              <s id="s.004341">
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              Metallica
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              igne conſtitu­
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              ta non reti­
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              nent colores
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              præter ni­
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              grum. </s>
              <s id="s.004342">Vermi­
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              cularis.</s>
            </p>
            <p type="margin">
              <s id="s.004343">
                <margin.target id="marg584"/>
              Cæruleum.</s>
            </p>
            <p type="margin">
              <s id="s.004344">
                <margin.target id="marg585"/>
              Ceruſſa.</s>
            </p>
            <p type="main">
              <s id="s.004345">Ceruſſa fit iniecto aceto acri in vas, inde
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              ſarmenta impone, ſarmentis plumbi tenues
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              bracteas pondo vnius. </s>
              <s id="s.004346">Sepeli in fimo equi­
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              no, poſt 25. dies colliges ceruſſam: vel ſi
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              diligentior cuſtos eſſe volueris, poſt primos
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              decem dies eradito, & reponito rurſus, ac
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              ter repetito. </s>
              <s id="s.004347">Aliud genus fuco aptiſſimum,
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              candidiſſimumque, vehitur ex hiſpania. </s>
              <s id="s.004348">In
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              vrinam bracteas pone tenues è plumbo can­
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              dido, hoc autem nos vocamus ſtannum, &
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              diſtilla vrinam totam, interim plumbum
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              tranſit in ceruſſam, ſiccatur, teritur, cri­
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              bratur.
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              </s>
            </p>
            <p type="margin">
              <s id="s.004349">
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              Sandix.</s>
            </p>
            <p type="main">
              <s id="s.004350">E ceruſſa ſandix fit, coloris rubicundi ve­
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              nuſtiſſimi. </s>
              <s id="s.004351">Ceruſſam igitur in ferream pati­
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              nam pone: agitáque iuxta ignem tamdiu,
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              donec rubeſcat, ac ſplendeat. </s>
              <s id="s.004352">Manifeſtum
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              eſt igitur ex optima ceruſſa optimam fie­
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              ri oportere. </s>
              <s id="s.004353">Ochra, id eſt, pallida naſci­
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              tur, velut & ſandix: vnde Virgilius,
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                <emph type="quote"/>
                <emph type="italics"/>
              Sponte ſua ſandix paſcentes veſtiet agnos.
                <emph.end type="italics"/>
                <emph.end type="quote"/>
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              </s>
            </p>
            <p type="margin">
              <s id="s.004354">
                <margin.target id="marg587"/>
              Ochra.</s>
            </p>
            <p type="main">
              <s id="s.004355">Sed nos eam quæ arte fit, docemus. </s>
              <s id="s.004356">Itaque
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              plumbum nigrum tamdiu in vaſe excoqui­
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              to, donec calorem ochræ contraxerit: nati­
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              uæ autem ochræ color eſt flammeus. </s>
              <s id="s.004357">Fit &
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              ex rubrica ochra, dum vaſe fimo oblito tor­
                <arrow.to.target n="marg588"/>
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              retur. </s>
              <s id="s.004358">Argenti ſpuma, quam vocamus Li­
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              thargyrium, fit dum ab argento plumbum
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              ſeparatur, eſtque plumbum impurum: atque
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              ex vtroque viciſſim in alterum tranſitus eſt:
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              retinet tamen argenti quandam vim, &
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              quæ colore eſt flauo, aurea ob id appellatur.
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                <arrow.to.target n="marg589"/>
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              Plumbago & ipſa ex plumbo fit: nam plum­
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              bum cùm vexatur ignibus, in hæc duo tran­
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              ſit; præſertim argento iunctum, argenti ſpu­
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              mam atque plumbaginem. </s>
              <s id="s.004359">Aliquantulum
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              ſplendet plumbago, cæterùm argenti ſpu­
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              mæ exterius ſimilis, infima parte colore ci­
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              nereo, media miſto, cum in puluerem, au­
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              rumque imitatur, ſi optima fuerit: hoc ſo­
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              lo differt, quòd non reſiſtit iniuriis cœli, nec
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              diuturna admodum eſt. </s>
              <s id="s.004360">Conſtat autem ex
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              plumbi albi, argentique viui, paribus por­
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              tionibus: ſalis rurſus Ammoniaci & ſulphu­
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                <arrow.to.target n="marg590"/>
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              phuris paribus iterum inter ſe portionibus,
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              ſed quæ ſint priorum ſextantes, aut qua­
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              drantes. </s>
              <s id="s.004361">Sal, & ſulphur ſubtiliter teruntur,
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              plumbumque album, & argentum viuum
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              miſcentur: nam plumbum album tenuiſſi­
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              ma in folia redactum eſſe oportet: miſcen­
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              tur omnia in vitreo vaſe, diſtillatóque: &
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              quod in imo remanſerit, purpurina vo­
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              catur. </s>
            </p>
            <p type="margin">
              <s id="s.004362">
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              Lithargy­
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              rium.</s>
            </p>
            <p type="margin">
              <s id="s.004363">
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              Plumbago.</s>
            </p>
            <p type="margin">
              <s id="s.004364">
                <margin.target id="marg590"/>
              Purpurina.</s>
            </p>
            <p type="main">
              <s id="s.004365">Omnis metallica materia, quæ arte con­
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                <arrow.to.target n="marg591"/>
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              ſtat, duabus ex partibus componitur: altera
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              quidem tenui & ignea, quæ plerunque vrit,
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              & coloris egregij eſt: altera terrea, quæ im­
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              modicè ſiccat: tota verò vt eſt compoſita,
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              meta lis mutandis conducit: igitur metalli­
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              ca factitia ad tres vſus parantur, ad mede­
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              lam humani corporis, ad picturam, & adul­
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              teranda metalla, gemmaſve: addi poteſt
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              quartus, qui præter propoſitum eſt, ſcilicet
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              ad venena. </s>
            </p>
            <p type="margin">
              <s id="s.004366">
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              Tres vtili­
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              tates metal­
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              licorum arte
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              conſtantiam.</s>
            </p>
            <p type="main">
              <s id="s.004367">Succedit omnibus his maiore miraculo
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              vitrum, artis opus tale, vt gemmeæ natu­
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              ræ, atque ob id mirum, quòd cùm omnes
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              ille ſeorſum, candidum, cæruleum, nigrum,
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              purpureum, viride, vitrum ſimul hæc obti­
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              neat. </s>
              <s id="s.004368">Memini me vidiſſe olim ſplendore ac
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              colorum varietate, tenacitatéque adeò ele­
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              gans, vt cælatum imitaretur Achatem. </s>
              <s id="s.004369">Mi­
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              ro ingenio nunc candido adeò ſubtiliter ac
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              ordinatè diſtinguitur, vt dicere poſſis non
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              facilius, aut ſubtilius ceram elaborari poſſe.
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              </s>
              <s id="s.004370">Vnicum hoc eſt fragilitatis humanæ exem­
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              plum, quod inter cæteros non ſolùm oculis,
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              ſed mente Principes perpetuò debent con­
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              templari: verùm fragilior eſt longè vitro
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              vita humana, atque tantò, quantò res, quæ
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              ſponte frangitur, ea quæ non niſi alieno im­
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              petu. </s>
              <s id="s.004371">Fiunt ex eo organa vocata, inſtrumen­
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              ta muſicæ, ſuauicæ admodum voce, & quæ
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              faſtum pulchritudine humani regni oſten­
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              dunt. </s>
              <s id="s.004372">Hinc colores iucundi, vox dulciſona,
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              ſplendor gratus, omnia leui caſu momento
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              pereuntia. </s>
              <s id="s.004373">Conſtat vitrum ex tribus lapidi­
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                <arrow.to.target n="marg593"/>
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              bus ſcilicet lucidis, vel arena, ſale chali, &
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              ſyderea: horum memini ſuperiùs me natu­
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              ram recitaſſe. </s>
              <s id="s.004374">Trita hæc omnia magno igni
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              mandantur in vaſis, cogunturque vi ignis
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              in vitrum, quod extractum denuò vaſis mi­
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              noribus in fornace excoquitur, & elabora­
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              ratur. </s>
              <s id="s.004375">Sed iam his relictis, quæ vel arte
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              conſtant, vel imperfecta ſunt, ad perfectiora
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              tranſeamus. </s>
            </p>
          </chap>
        </body>
      </text>
    </archimedes>
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