Clavius, Christoph
,
In Sphaeram Ioannis de Sacro Bosco commentarius
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Ioan. de Sacro Boſco.
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ctiorum proijcerentur ſecundum lineam rectam, (ut demonſtratiue concludi
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poſſet, niſi id negotij ad ſcientiam de Horologiorum deſcriptionibus ſpecta-
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ret) ſi uertex gnomonis non concedatur eſſe idem, quo ad iudicium ſenſus,
<
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quod centrum terræ: </
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<
s
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xml:space
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">Hoc autem clariſſime experientiæ repugnat. </
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<
s
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xml:space
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">Si enim
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tempore æquinoctiorum in quocunque plano ſtylus affigatur, notenturq́ue
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uarijs horis diei extremitates umbræ in plano illo punctis quibuſdam, depre-
<
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hendentur omnia hæc puncta in una linea recta iacere: </
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<
s
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xml:space
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">Quod quidem ſolum
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ea de cauſa contingit, quia nimirum uertex ſtyli aſſumitur tanquam mundi
<
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/>
centrum, ut clariſſime in noſtra Gnomonica demonſtrauimus. </
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<
s
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xml:space
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">Quarto, Neque
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ortus Solſtitij æſtiui reſpõderet per lineam rectam occaſui Brumalis Solſtitij:
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</
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<
s
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xml:space
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">Neque ortus Solſtitij Brumalis occaſui Solſtitij æſtiui. </
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<
s
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xml:space
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">Quinto, Confundc
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-
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rentur uniuerſa proportio, quam nunc cernimus in augmento, decrementoq́
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; </
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<
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dierum ante & </
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<
s
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xml:space
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">poſt æquinoctium utrumque. </
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<
s
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xml:space
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">Quæ cum omnia abſurda ſint & </
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<
s
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xml:space
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quotidianæ aduerſentur experientiæ, omnibusq́. </
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<
s
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xml:space
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">Aſtronomorum peritorum
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obſeruationibus, concludendum erit, Terram eſſe ueluti punctum inſenſibile,
<
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ſi cum cæleſti corpore conferatur.</
s
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</
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<
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<
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<
emph
style
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emph
>
, ac poſtrema ratio hæc ſit. </
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>
<
s
xml:id
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xml:space
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">Secundum cõem Aſtronomorum
<
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ſententiam ſemidiamet
<
unsure
/>
er Firmamenti, quo ad concauam eius ſuperficiẽ, terrę
<
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/>
ſemidiametrũ continet uicies & </
s
>
<
s
xml:id
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xml:space
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">bis millies, ſexcenties, & </
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<
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xml:space
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">duodecies, & </
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>
<
s
xml:id
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xml:space
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">eo am-
<
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plius, ita ut ſit talis proportio totius ſemidiametri Firmamenti ad ſemidiame-
<
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trum globi, qui cõſtat ex terra, & </
s
>
<
s
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">aqua, qualis eſt huius numeri 22612. </
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xml:space
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">{1/2}. </
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<
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xml:space
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</
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<
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xml:space
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<
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xml:space
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">n. </
s
>
<
s
xml:id
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xml:space
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">diſtantia Firmamenti à centro terræ eſt deprehenſa, ut ad finẽ huius
<
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c. </
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>
<
s
xml:id
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xml:space
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">dicemus: </
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>
<
s
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xml:space
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">ut nimirum à terra uſq. </
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>
<
s
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xml:space
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">ad Firmamentũ contineantur terræ ſemidia
<
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<
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xlink:label
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note-183-01
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xlink:href
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xml:space
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">15. quinto.</
note
>
metri 22612 {1/2}. </
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<
s
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xml:space
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">Ac propterea, cum eadem ſit proportio diametrorum, quæ ſe-
<
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midiametrorum, continebit quoq. </
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<
s
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xml:space
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">toties tota diameter Firmamenti totam ter
<
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ræ diametrum. </
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<
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xml:space
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">Cum ergo ſphęrarum proportio triplicata ſit eius proportioni@
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<
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xml:space
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">18. duod.</
note
>
quam habent diametri, habebit totus mundus intra concauum Firmamenti
<
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contentus ad globum terrę proportionem eandem, quã 11562340095703 {1/8}.
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</
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<
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<
s
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xml:space
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">ut in his numeris continue proportionalibus apparet. </
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<
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">1. </
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<
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">22612 {1/4}. </
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<
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511325156 {1/4}. </
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<
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xml:space
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">11562340095703 {1/8}. </
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<
s
xml:id
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xml:space
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">Quæ cum ita ſint, non immerito dicetur
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terra inſenſibilem quantitatem habere, ſi cũ Firmamento conferatur: </
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>
<
s
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xml:space
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tas nihil fere ſit reſpectu tanti numeri. </
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<
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<
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">ut planius adhuc percipiatur, totã
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terram eſſe inſtar puncti reſpectu Firmamenti, accipiemus ſphærulam, cuius
<
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diameter ad pedem Geometricum antiquum proportionem fere habeat quam
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1. </
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<
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<
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xml:space
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">qualis eſt ſphærula in hac ſigura appoſita. </
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<
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xml:space
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">Nam ſi aliam ſphæram acci-
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piamus, cuius diameter contineat 400. </
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<
s
xml:id
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xml:space
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">pedes, ita ut proportio huius diametri
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ad diametrum illius ſphærulæ ſit, quæ 17600. </
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<
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<
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xml:space
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<
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fig-183-01
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fig-183-01a
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66
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183-01
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xlink:href
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http://echo.mpiwg-berlin.mpg.de/zogilib?fn=/permanent/library/xxxxxxxx/figures/183-01
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xlink:label
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xml:space
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tio huius
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quintæ @@-
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tionis.</
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bit, ſphærulam illam eſſe inſtar punct: </
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>
<
s
xml:id
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xml:space
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huius ſphæræ? </
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<
s
xml:id
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xml:space
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">Cum ergo terra reſpectu Firmamenti ſit multo
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minor, quàm ſphærula illa reſpectu huius ſphæræ, (poſita nãq;
<
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</
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<
s
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<
s
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xml:space
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eſt, vt 11562340095703. </
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<
s
xml:id
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xml:space
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">& </
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>
<
s
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">paulo amplius, ut diximus. </
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>
<
s
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autem ſphęrula prædicta, ut 1. </
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<
s
xml:id
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xml:space
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">ſphæra illa alia erit cantummodo,
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@t 545177600000. </
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>
<
s
xml:id
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xml:space
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">Hic enim numerus ad unitatem proportio-
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nem habet triplicatam eius, quam habet diameter ſphæræ illius
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ad diametrum ſphærulæ prædictæ, ut in his numeris apparet. </
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<
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<
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<
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309760000. </
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<
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">5451776000000.) </
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>
<
s
xml:id
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xml:space
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">multo magis punctum dicemus eſſe terram re
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ſpectu Firmamenti, quàm ſphærulam illam reſpectu alterius ſphæræ.</
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