Casati, Paolo
,
Terra machinis mota : dissertationes geometricae, mechanicae physicae hydrostaticae
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ſemidiametro, remanet AD ped. 242, alti
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tudo, ex qua proſpici poteſt in B ita, vt aſpe
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ctui pateant ſtadia 180. Quî autem fieri poſ
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ſit ab intuente ſimilem ſemper orbem vide
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ri, ſiuè vlteriùs acceſſerit, ſiue retrorſum re
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ceſſerit, Macrobius ipſe viderit: an ſemper
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eam inueniat altitudinem, cui inſiſtat, vt
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oculus ab extimâ telluris facie pedibus 242
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ſemoueatur? </
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>Horizontis igitur ſemidiame
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trum aut ſtadijs 180 minorem eſſe, aut non
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ex humani corporis altitudine definiri ne
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ceſſe eſt. </
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XXXXVI
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Authorum
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aliquorum
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lapſus iņ
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statuendą
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nimia viſus
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distantia.
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>Cum verò ille labantem Macrobij ſen
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tentiam ſuffulcire aliquatenus ſe poſſe con
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ſideret, ſtadia 180 tribuendo non arcui AB,
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ſed rectæ DB terram tangenti, quæ & radij
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optici ex oculo D prodeuntis menſura eſt, &
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arcu AB longior; operam demum ſe ludere
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ſenſit, cum re ad Geometricam normam
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reuocatâ tantam opticæ lineæ longitudinem
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terrenæ magnitudini minimè congruere ma
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nifeſtè deprehendit, etiam ſi oculus à terrâ
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pedum 50. interuallo AD ſeiunctus intelliga
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tur. </
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>Quoniam enim quadratum Tangentis
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BD, quæ ſtad. </
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<
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>180 ponitur, æquale eſt re
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ctangulo ADE, diuidatur quadratum ped.
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11664.000000 per 50, & erit DE ped. 233
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280000, hoc eſt ſtadiorum Græcorum (quæ </
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