Casati, Paolo
,
Terra machinis mota : dissertationes geometricae, mechanicae physicae hydrostaticae
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quintâ, ducantur lineolæ parallelæ ipſi CA,
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donec diagonalem attingant: & his paratis
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habetur vncia AC diuiſa in partes 500, vel
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ſaltem in 250, ſi differentia inter duas pro
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ximas lineolas ſenſibilis non ſit. </
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>Quamuis autem tam exiguum triangu
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lum AEB non ſit aptum ad acutiores angu
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los inueniendos, conſtat tamen poſſe illud
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ſinè magno incommodo conſtrui ita, vt pe
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des aliquot ſingula latera obtineant; & tunc
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etiam minores angulorum particulæ innote
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ſcent. </
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>Quod ſi quando res ſit quàm exa
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ctiſsimè perficienda, poterit lateri FE addi
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regula, ex cuius extremo ſecundùm rectam
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AE productam ſuſpendatur perpendiculum,
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perinde enim erit ac ſi totum triangulum
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augeretur. </
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>At ſi ex editiore loco deorſum
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ſpectandum ſit, & perpendiculum ex I ſu
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ſpenſum cadat in latus EB tam propè ipſum
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B, vt non facilè poſsint particulæ numera
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ri, erigatur ad latus AE regula perpendicu
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laris, in qua recta ex B per I ducta faciat an
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gulum EIG rectum, & ſumatur IG æqualis
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ipſi IE, & ex G ſuſpendatur perpendiculum,
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quod intelligatur cadere ex. </
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<
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>gr. in R. </
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enim concipiatur ex I aliud perpendiculum
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IS, vtique linea IG incidens in duas paralle
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las IS, & GR facit angulum SIB externum </
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