Casati, Paolo, Terra machinis mota : dissertationes geometricae, mechanicae physicae hydrostaticae

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                <pb xlink:href="018/01/095.jpg" pagenum="81"/>
              qui ex maximâ visûs diſtantiâ, ſeu Hori­
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              zontis Phyſici ſemidiametro, totius telluris
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              ſemidiametrum colligere ſe poſſe cenſeban. </s>
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              Primùm verò ſtatuebat, quod certum eſt, ab
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              iis qui de maximâ visûs diſtantiâ diſputant,
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              non eam inquiri, quæ vel ab oculis variè af­
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              fectis, vel à diuersâ corporum videndorum
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              magnitudine, vel ab inæquali ſpecierum,
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              quas vocant, intentionalium, quibus obie­
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              ctum repræſentandi vis ineſt, diffuſione ea­
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              rumue intenſione petenda eſt. </s>
              <s>Nemo enim
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              ignorat, ſi iſta ſpectentur, fieri non poſſę,
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              vt certa visûs diſtantia vniuerſim præſcriba­
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              tur. </s>
              <s>Acribus ſiquidem & acutis oculis longè
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              remotiora patere conſtat, quàm hebetiori­
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              bus, quos languidiores radii procul immiſsi
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              ad viſum non excitant. </s>
              <s>Vbi verò obiectum
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              corpus non oculorum vitio latet, ſæpè ſuâ
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              ſe paruitate ita protegit, vt admiſsi à pupillâ
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              radii in tenuiſsimum angulum coaleſcentes
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              eam demùm afficiant Retinæ particulam,
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              quæ eum ſenſum omnem effugiat, ſentiendi
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              quoquè munere ſolitaria fungi non poteſt:
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              vt proinde Dioptrica ſubſidiarias lentes vi­
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              treas in tuboſpicillo ritè diſpoſitas mortali­
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              bus tranſmiſerit, quarum ope inflexi Radii
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              ampliorem angulum conſtituant, ideòquę
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              maiorem Retinæ particulam ad videndum </s>
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