Guevara, Giovanni di, In Aristotelis mechanicas commentarii, 1627

Table of figures

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              modò facilius extrahatur; plumbum vel ſimile aliud onus
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              ſuperimponitur ipſi extremo C, vt eo depreſſo, eleuetur
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              alterum extremum D, per conuerſionem ipſius ligni CD,
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              tanquam vectis ſuper fulcimentum A; & ad eleuationem
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              ipſius extremi D, vas ex eo pendens, pariter euehatur, & è
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              puteo extrahatur. </s>
              <s id="N16F43">Expedit autem facilitas potius in vaſis
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              extractione, quàm in demiſſione;
                <expan abbr="idq.">idque</expan>
              tam ex parte poten­
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              tiæ, quàm ex parte ponderis. </s>
              <s id="N16F4E">Ex parte quidem potentiæ,
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              quia laborioſus eſt cum difficultate extrahere, quàm cum
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              difficultate demittere. </s>
              <s id="N16F55">Nam corpus humanum dum ex­
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              trahendo inclinatur, ſuo præpeditur pondere, ne expeditiùs
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              erigatur,
                <expan abbr="funemq.">funemque</expan>
              paulatim reducat, & per eam vas ipſum
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              ſubleuet. </s>
              <s id="N16F62">Contra verò dum ad vas demittendum, & immer­
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              gendum, funis cum ligni extremo D trahitur deorſum, illi
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              naturali quodam nutu incumbit, commodiuſque vires
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              exerit, ac difficultatem omnem euincit; vt experiri etiam eſt
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              in vſu trachleæ ad exhauriendam aquam, vel ſuſtollendum
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              quodlibet aliud pondus per funis detractionem. </s>
              <s id="N16F6F">Deinde
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              ex parte ponderis, quia minor eſt difficultas demiſsionis,
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              quàm extractionis prædictæ. </s>
              <s id="N16F76">Siquidem pondus lapidis, aut
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              plumbi, quod ſuperari debet in vaſis miſsione, æquale eſt
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              ponderi ſolius aquæ hauriendæ ipſo eodem vaſe, vt dictum
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              eſt: pondus autem quod ſuperandum eſt in extractione,
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              non ſolum eſt pondus aquæ hauriendæ, ſed etiam
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              vaſis, ac funis, ideoque maius conſtituitur,
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              ac difficilius ſuperatur. </s>
              <s id="N16F85">Conſultius ergo
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              eſt, maiori difficultati ſuccur­
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              rere ipſo machinæ bene­
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              ficio, ac ponde­
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              re adie­
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              cto
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              in altero extremo, vt
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              aiebat Philoſo­
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              phus. </s>
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