Borelli, Giovanni Alfonso, De motionibus naturalibus a gravitate pendentibus, 1670

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              <s id="s.001618">
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                <lb/>
              eiuſdem ferri, vel vitri fluentis inſignitèr augetur ſu­
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              pra molem, quam idem corpus durum, & conſiſtens
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              priùs habebat; ignis ergò copioſiſſimè, & vehemen­
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              tiſſimè fluens inter particulas ferri, vel vitri
                <expan abbr="idẽ">idem</expan>
              pro­
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              pemodum præſtat, ac rotulæ, vel cylindri ſuper quo­
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              rum rotunditatem lapides anguloſi, & figuras irre­
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              gulares habentes labuntur, vel vſum præſtat ſebi,
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              vel cuiuslibet alterius corporis vnctuoſi, ope cuius a­
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              renulæ aſperrimæ
                <expan abbr="lubricitatẽ">lubricitatem</expan>
              acquirere poſſunt, & v­
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              na particula ſuper aliam facili negotio circumuolui,
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              agitari, ac dilabi poteſt, quod perindè eſt, ac ſi præ­
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              dictæ particulæ vitri, aut ferri acquiſiuiſſent figuram
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              lęuem, rotundam, vel orbicularem ęmulantem. </s>
              <s id="s.001619">Ve­
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              rum tamen eſt, quòd huiuſmodi operatio effici nullo
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              modo poteſt abſque commotione, vertigine, &
                <expan abbr="trãſ-poſitione">tranſ­
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                poſitione</expan>
              minimarum partium metalli, vel vitri, ſed
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              non indè euincitur fluiditatem in tali caſu abſolutè
                <lb/>
              dependere à prædicta commotione partium, niſi ex
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              accidenti, quatenus non poſſunt ſegregari, & fluere
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              particulæ aſperæ, & anguloſæ ferri, vel vitri abſque
                <lb/>
              ſuperabundanti, & vehementi profluuio ignis, à quo
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              demùm particulæ ipſæ ſolidæ lubricitatem, &
                <expan abbr="motũ">motum</expan>
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              acquirunt. </s>
              <s id="s.001620">Hoc autem bellè confirmatur ab experi­
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                <arrow.to.target n="marg417"/>
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              mento adducto à doctiſſimo Roberto Boile quando
                <lb/>
              alabaſtri
                <expan abbr="puluerẽ">puluerem</expan>
              ab igne feruenti fluxibilitatem ac­
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              quiſiuiſſe ait, at poſtmodum quælibet particula eiuſ­
                <lb/>
              dem fluoris ſupra papyrum refrigerata reperiebatur
                <lb/>
              aggeries arenularum minutiſſimarum, neque concre­
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              tum, & ſolidum corpus efficiebat, vt in vitro, & fer-</s>
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