Casati, Paolo
,
Terra machinis mota : dissertationes geometricae, mechanicae physicae hydrostaticae
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rectâ CG bifariam. </
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<
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>Quare ſi angulorum ob
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ſeruatorum ſemidifferentiam GCF addas an
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gulo FCB complemento noto anguli obſer
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uati in B, notus eſt etiam angulus BCG; ex
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quo, vnâ cum angulo CBG obſeruato, & la
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tere BG inuento, inuenitur latus CB: Cui ſi
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addatur data altitudo BA, notum erit latus
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CA vnâ cum angulo ad A obſeruato in trian
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gulo AEC rectangulo: quare & inuenitur CE
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ſemidiameter quæſita, quæ eſt ipſi CD æqua
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lis, vnde innoteſcit altitudo collis BD, &
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lineæ opticæ AE longitudo cognoſci poteſt. </
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XLIX
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Sexta me
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thodus ter
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ræ ſemidia
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metrum in
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quirendi, &
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montis alti
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tudinem co
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gnoſcendi.
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<
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>At contingat ex edito quidem monte pro
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ſpici poſſe in
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horizontem, ſed planè
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ignotam eſſe montis al
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titudinem. </
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<
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>Eligatur lo
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cus aliquis conſpicuus,
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qui ita diſtare cenſea
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tur, vt perpendicula
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res ex vtroque loco ad
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centrum ductæ à pa
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ralleliſmo deflectentes
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ſenſu dignoſci queant. </
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Hinc enim terræ ſemidiametrum eruerę
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poſſumus. </
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<
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>Ex A igitur ſit linea AD terram
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tangens: obſeruetur angulus CAD. </
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<
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>Tum
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ad eaſdem vel alias partes eligatur locus B </
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