Heron <Alexandrinus>
,
Heronis Alexandrini spiritalium liber
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THEOREMATA SPIRITALIA.
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ex canali 13, vel 14. </
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ſcendentes, aſcendendo ſurſum trahent aquam, & </
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<
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per cannas 6, 7, 8, 9, in cannam 10 & </
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<
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">11 quæ adeo erit preſſa vi circum-
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volutæ rotæ, ut pro libitu in quamvis altitudinem cum impetu feratur.
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</
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<
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">Notandum autem eſt, ut ubiad deſtinatum locum pervenerit, ibi adſit
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vas recipiens, ex quo aqua derivetur in aliam cannam, quæ eam deorſum
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ferat; </
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<
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">& </
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<
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">ſic per ejus violentum defluxum quidvis præſtari poterit: </
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<
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in iſto vaſe plus aquæ influat, poterimus alia canna terminata facere, ut
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inde per ſe ipſam effluat, circumdando, ut omnes modioli ſtentintra
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aquam, & </
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<
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">ſorſitan non fuerit commodum ſacere locum rotæ ſeparatum à
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loco modiolorum: </
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">omnis autem aqua, utut lutoſa & </
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<
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">turbida, omnino
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apta eſt ad circumvolvendum rotam: </
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<
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xml:space
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">verum ad projiciendum eam per
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cylindros in modiolos, oportet eſſe liquidam, ut exitus cannarum claudan-
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tur cum luto, ſi aqua intro occludatur: </
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<
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">cui rei prævideriſolet ſoratori-
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bus, & </
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">quia aqua non elevatur ſupra cylindros: </
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<
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">ſed ſemperad quoddam
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ſignum ſubſiſtit, neceſſe eſt illi etiam facere ſuos exitus, ne poſſit exce-
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dere locum determinatum. </
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<
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">Reliquum artificii facillimo negotio capi po-
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teſt ex ipſa ſigura, neque videtur nune quid amplius hac de re dicendum; </
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niſi ut monſtrem, quâ ratione idem eſſectus, quem deſcripſimus de aqua
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fluente, præſtari poſſit ſacile opera uuius hominis, & </
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<
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laborabo in deſcribendis his artiſiciis, cum figuræ horum duorum modo-
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rum ſufficiant ad eorum intelligentiam. </
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<
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lente, & </
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">demonſtrabimus propter velocitatem motuum circularium,
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quomodo pondera attrahantur & </
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