Casati, Paolo
,
Terra machinis mota : dissertationes geometricae, mechanicae physicae hydrostaticae
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effata, quibus 30 milliaria Italica videntur
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mediocris visûs diſtantia: quare multò pro
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babilior ei apparebat Macrobrii atque Era
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toſthenis ſententia diſtantiam huiuſmodi ſta,
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ſtijs 180 definientium. </
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<
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minandum contulimus telluris ambitum ab
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Eratoſthene conſtitutum, an cum illa ſemi
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diametto ſtadiorum 180 cohæreret:
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Eui
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dentiſſimis
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enim, vt Macrobius loquitur lib.
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1. in ſomn. </
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& indubitabilibus
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dimenſionibus conſtat vniuerſæ terræ ambitum,
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quæ vbicunque vel incolitur, vel inhabitabilis
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iacet, habere ſtadiorum millia ducenta quin
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quaginta duo.
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<
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pars milleſima quadringenteſima ſint ſtadia
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180, per quæ directa ab oculis acies pergit,
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arcus BA gr.o.m.15.ſec.25. Ter. 42. &c. </
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metitur angulum BCD in centro factum. </
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At quoniam peripheria ponitur ſtad 252000
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eſt diameter minor verâ ſtad. (80181 9/11), maior
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autem verâ (80233 41/223): quarè ſumpto medio
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Arithmetico e
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diameter AC ſtad. </
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>80207 1/2,
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& ſemidiameter CA ſtad. </
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>40103 3/4. Fiat igitur
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vt CB 99998.99293. ſinus complementi
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gr.o.m.15.ſec. 25. Ter.42. ad CD Radium
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100000.00000, ita CB ſtad.40103 3/4 ad CD
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ſtad, 40104, & ped.92. Demptâ autem CA </
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