Casati, Paolo
,
Terra machinis mota : dissertationes geometricae, mechanicae physicae hydrostaticae
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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. </
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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. </
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<
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>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. </
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<
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>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. </
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>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 </
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