Casati, Paolo, De igne dissertationes physicae, 1686

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              <pb o="387" file="0399" n="399" rhead="De Coloribus per Ignem mutatis."/>
            ue, qui apud Magnę Britannię Regem legati munere fungebatur,
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            audiui pretioſis aulæis, quibus aurum aut intertextum erat, aut
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            in tęnias deductum, plurimum ſplendoris deceſſiſſe, quòd ex li-
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            thanthrace, cuius glebis ibi inſtruitur focus, vapor ſulphureus
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            conclaue peruagatus aurum infecerat. </s>
            <s xml:id="echoid-s11729" xml:space="preserve">Auro videlicet, aut roſis,
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            adhęrent ſulphuris particulę, quę natiui coloris ſuauitatem per-
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            dunt: </s>
            <s xml:id="echoid-s11730" xml:space="preserve">Sic marmoris candorem infuſcat aqua ex caſtaneis deducta;
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            </s>
            <s xml:id="echoid-s11731" xml:space="preserve">tam obſcuris etenim maculis ex illius contactu fœdatur, vt ad
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            illas delendas non ſatis ſit extimam ſuperſiciem abradere. </s>
            <s xml:id="echoid-s11732" xml:space="preserve">Contra
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            verò colorem mutari abſtractis aliquibus particulis videturſuadere
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            tùm Ochra, quę lutea cum ſit, in Rubricam exuſtione conuerti-
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            tur; </s>
            <s xml:id="echoid-s11733" xml:space="preserve">tùm Ceruſſa, cuius candor, ſi in crucibulo igni validiſſimo
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            exponatur, abit in rubedinem, & </s>
            <s xml:id="echoid-s11734" xml:space="preserve">eſt Minium vulgare officina-
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            rum. </s>
            <s xml:id="echoid-s11735" xml:space="preserve">Quemadmodum enim Infectores Crocum ſacculo incluſum
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            in profluente aquâ tandiu pedibus ſubiectum pulſant, dum ex-
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            cluſis aliquibus particulis, & </s>
            <s xml:id="echoid-s11736" xml:space="preserve">croceo colore diſiecto ſolus rubor
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            remaneat, & </s>
            <s xml:id="echoid-s11737" xml:space="preserve">*Crocum lotum* vocant: </s>
            <s xml:id="echoid-s11738" xml:space="preserve">ita pariter vi caloris ignei
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            Ochra (Sil latinis dici colligit Daniel Barbarus ex Vitruuij lib. </s>
            <s xml:id="echoid-s11739" xml:space="preserve">7. </s>
            <s xml:id="echoid-s11740" xml:space="preserve">
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            cap.</s>
            <s xml:id="echoid-s11741" xml:space="preserve">7.) </s>
            <s xml:id="echoid-s11742" xml:space="preserve">& </s>
            <s xml:id="echoid-s11743" xml:space="preserve">Auripigmentum ſi exurantur, amittunt aliquas parti-
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            culas, quas ſecum auolantcs igniculi rapiunt, adeò vt reliquæ
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            particulę rubeſcant. </s>
            <s xml:id="echoid-s11744" xml:space="preserve">Aquâ nimirum atque igne ſimiliter elui vi-
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            dentur ſordes ſiuè ex lineis, ſiuè ex Asbeſtinis mappis; </s>
            <s xml:id="echoid-s11745" xml:space="preserve">aquę enim
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            lixiuię immiſti ſales, addito aliquo motu, peruadunt telę fila, ſi-
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            bique vniunt particulas, quas demum ſecum auehunt, cùm ex
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            linteo exprimitur aqua. </s>
            <s xml:id="echoid-s11746" xml:space="preserve">Sic ex Atlante Sinico pag.</s>
            <s xml:id="echoid-s11747" xml:space="preserve">82.</s>
            <s xml:id="echoid-s11748" xml:space="preserve">in VII Pro-
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            uinciâ Huquang. </s>
            <s xml:id="echoid-s11749" xml:space="preserve">*Propè Choxam amnis est Cungyang, cuius aqua*
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            *maculas omnes facilè è veſtibus eximit, & </s>
            <s xml:id="echoid-s11750" xml:space="preserve">ad ferramenta exacue n-*
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            *da optima eſſe ſcribitur; </s>
            <s xml:id="echoid-s11751" xml:space="preserve">quòd neſcio quid mordacitatis habere videa-*
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            *tur.</s>
            <s xml:id="echoid-s11752" xml:space="preserve">* Sed & </s>
            <s xml:id="echoid-s11753" xml:space="preserve">igniculi ſe inſinuantes in corpus aliquod, & </s>
            <s xml:id="echoid-s11754" xml:space="preserve">ſul-
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            phuris non modicam copiam abſtrahentes, ſpirituumque nexum,
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            aut Salium volatilium, diſſoluentes, partim expellunt, partim
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            ſecum rapiunt.</s>
            <s xml:id="echoid-s11755" xml:space="preserve"/>
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            <s xml:id="echoid-s11756" xml:space="preserve">Maur. </s>
            <s xml:id="echoid-s11757" xml:space="preserve">Vtique ea eſt caloris ignei efficacitas, vt pro variâ par-
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            ticularum reſolutione corpora lucem excipiendo eam aliter ad in-
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            tuentium oculos reflectant, aliumque, ac priùs, colorem repræ-
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            ſentent. </s>
            <s xml:id="echoid-s11758" xml:space="preserve">Hoc compertum eſt effectoribus gemmarum, quibus faci-
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            lè imponant minùs peritis, effictas gemmas pro natiuis obtrudendo:</s>
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