De rerum varietate, libri XVII . uo-bus ergo motibus, quoru alterfit fuper polos mathematicos,alterfuperriaturales,mathema-ticus circuitus fit per helicas incomparatione admotum ma-thematicum. Si uero ambo motus fiant fuper polis naturali-bus,uclutin figurafpha^ra; fupcriore,fuper a b polis, moueaturh K:defcribet ergo circulos cir-ca a b parallelos: fint rurfus cir- citoris poli h K,du* uero ffelle. l m arqualiter ab h k diftan-tesMpfa- quidem defcnbent circulos circa h K,&reliqnar o-mnes:fedH Kcirea AB,quiaH Kmouetur circulari motucirca a B,quia a b funt poli circuducetis, & no mouetur in cir
De rerum varietate, libri XVII . uo-bus ergo motibus, quoru alterfit fuper polos mathematicos,alterfuperriaturales,mathema-ticus circuitus fit per helicas incomparatione admotum ma-thematicum. Si uero ambo motus fiant fuper polis naturali-bus,uclutin figurafpha^ra; fupcriore,fuper a b polis, moueaturh K:defcribet ergo circulos cir-ca a b parallelos: fint rurfus cir- citoris poli h K,du* uero ffelle. l m arqualiter ab h k diftan-tesMpfa- quidem defcnbent circulos circa h K,&reliqnar o-mnes:fedH Kcirea AB,quiaH Kmouetur circulari motucirca a B,quia a b funt poli circuducetis, & no mouetur in circitorc,quia fua-tpoIieius:ergo,fi a b eirentpolifixi,K h defcnberet circulos c;rca eos,& ita circulariter moueri uideretur, & circaeapundaomnes ftella-&puncfacifcitofis, fedcirca a b nullum aliud pundum,quia circa h amboorbeshaberentalium motum fiiperpolis mathcmati-os, hehcas faceret circitor, & in circitore hclicas uero helicas fi poii ita co- ftituatur. 4<54 LI B. IX. C AP. XL VII. ftituaturad eclipticaepolos,ut ad eclipticam medius circu-lus fecando appropinquet, ex his tribus motibus contra-,. riis,quorumfuntfupcrpolisnaturalibus, manifeftumKtfttxa eftfieripofTereflexas,utinexemplo tedocui. Sedpolinocfuom quadrantc diftabunt ,nechorummotuumratio adhucc5- °Tl fl t ^at>nec multo minus rctrocefsus. Oportct autem in reflc-^ xamotumcotrauediuelocemcfle, &polosparum diftareapolis circitoris,fcu exiguam ellc indinationem: in omniautemmotucircitoris,quifitfupereifdcm polis cumcircuducente,fi fit ad candem partem,tanto uelocior cft, quan-toipfccircitoruelocius mouetur:& lipoli nonfintiidem,quanto diftantiaminorfuerit,&,tanto tardior,quanto circitoris motus uelocior eft. Et fi poli non fintiidcm angulimediorum circulorumfucrint ubi qua-drante poli diftiterint,uariabuntur omniarfi naturaliter fi-xi fint, mathematice:fi autem mathematice fixi fint,
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