Clavius, Christoph
,
Gnomonices libri octo, in quibus non solum horologiorum solariu[m], sed aliarum quo[quam] rerum, quae ex gnomonis umbra cognosci possunt, descriptiones geometricè demonstrantur
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<
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">GNOMONICES LIBER TERTIVS.</
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213
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0309-01
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http://echo.mpiwg-berlin.mpg.de/zogilib?fn=/permanent/library/xxxxxxxx/figures/0309-01
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<
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xml:space
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">AVCTORE
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CHRISTOPHORO CLAVIO BAMBER GENSI SOCIETATIS IESV.</
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<
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>
<
s
xml:id
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echoid-s19867
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xml:space
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preserve
">QVINQVE genera horologiorum, dequibus ſuperiore libro
<
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<
note
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xlink:label
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note-0309-02
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xlink:href
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note-0309-02a
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xml:space
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">Cur quinque
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unsure
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genera horolo-
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giorum, de qui
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bus ſuperiore
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lib. egimus, Re-
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gularia dican-
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tur.</
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>
egimus, hoc eſt, Horizontale, Verticale, Meridianum, Pola-
<
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re, & </
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>
<
s
xml:id
="
echoid-s19868
"
xml:space
="
preserve
">Aequinoctiale, dici poſſunt regularia, propterea quòd
<
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/>
plana, in quibus deſcribuntur, determinato ſem per puncto cę-
<
lb
/>
li vbiuis terrarum opponuntur; </
s
>
<
s
xml:id
="
echoid-s19869
"
xml:space
="
preserve
">vtpote primum vertici capi-
<
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/>
<
note
position
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left
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xlink:label
="
note-0309-03
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xlink:href
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note-0309-03a
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xml:space
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">20</
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>
tis, ſeu polo Horizontis; </
s
>
<
s
xml:id
="
echoid-s19870
"
xml:space
="
preserve
">ſecundum polo Verticalis circuli pro-
<
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/>
<
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position
="
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"
xlink:label
="
note-0309-04
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xlink:href
="
note-0309-04a
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xml:space
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">Cuinam pũcto
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cœli opponai
<
unsure
/>
ur
<
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/>
horologium ho
<
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/>
rizon tale, Verti
<
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/>
eale, Meridia-
<
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/>
num, Polare, &
<
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/>
æquine
<
unsure
/>
ctiale.</
note
>
priè dicti, in quo videlicet ſe mutuo interſecant Horizon, at-
<
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que Meridianus; </
s
>
<
s
xml:id
="
echoid-s19871
"
xml:space
="
preserve
">tertium polo Meridiani, ſiue puncto veri or-
<
lb
/>
tus, occaſusve, vbi Aequator Horizontem diuidit; </
s
>
<
s
xml:id
="
echoid-s19872
"
xml:space
="
preserve
">quartum
<
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puncto Meridiani circuli, in quo ab Aequatore ſecatur; </
s
>
<
s
xml:id
="
echoid-s19873
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xml:space
="
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">& </
s
>
<
s
xml:id
="
echoid-s19874
"
xml:space
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">quintum denique polo
<
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/>
mundi, ſeu Aequatoris. </
s
>
<
s
xml:id
="
echoid-s19875
"
xml:space
="
preserve
">Reliqua autem quatuor genera, quæ hoc libro deſcriben-
<
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/>
<
note
position
="
right
"
xlink:label
="
note-0309-05
"
xlink:href
="
note-0309-05a
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xml:space
="
preserve
">Cur quatuor
<
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horologiorum
<
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/>
genera, de qui-
<
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/>
bus hoc lib. agi
<
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/>
tur, Irregulatia
<
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dicantur.</
note
>
da proponimus, irregularia poſſunt appellari, qualia ſunt, Declinans à Verticali cir-
<
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culo proprie dicto; </
s
>
<
s
xml:id
="
echoid-s19876
"
xml:space
="
preserve
">Declinans ab Horizonte; </
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>
<
s
xml:id
="
echoid-s19877
"
xml:space
="
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">Inclinatum ad Horizontem; </
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>
<
s
xml:id
="
echoid-s19878
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xml:space
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">Decli-
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nans à Verticali, & </
s
>
<
s
xml:id
="
echoid-s19879
"
xml:space
="
preserve
">ſimul ad Horizontem inclinatum. </
s
>
<
s
xml:id
="
echoid-s19880
"
xml:space
="
preserve
">Nam puncta cæli, quibus eo-
<
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rum plana obiiciuntur, ſexcentis modis variari poſſunt, cum magis, & </
s
>
<
s
xml:id
="
echoid-s19881
"
xml:space
="
preserve
">minus à Ver-
<
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<
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xlink:label
="
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xlink:href
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xml:space
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">30</
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>
ticali, ſeu Horizonte poſſint deflectere, & </
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>
<
s
xml:id
="
echoid-s19882
"
xml:space
="
preserve
">ad Horizontem inclinare, vt perſpicuum
<
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eſt. </
s
>
<
s
xml:id
="
echoid-s19883
"
xml:space
="
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">Id quod de prioribus planis nulla ratione dici poteſt. </
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>
<
s
xml:id
="
echoid-s19884
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xml:space
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preserve
">In omni enim climate, ſiue
<
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regione eodem modo ſe habent, & </
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>
<
s
xml:id
="
echoid-s19885
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xml:space
="
preserve
">ſeſe interſecant Horizon, Verticalis primarius,
<
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<
note
position
="
right
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xlink:label
="
note-0309-07
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xlink:href
="
note-0309-07a
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xml:space
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">Hotizon, Verti
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calis, ac Meri-
<
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dianus, It
<
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/>
em
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Meridianus, cir
<
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culus horæ 6. à
<
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mer. vel med.
<
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/>
noc. atque Ae-
<
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quator, in om-
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ni climate ſe
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mutuo ſecãt
<
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ad
<
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/>
rectos angulos
<
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/>
.</
note
>
Meridianus, circulus horæ ſextæ à meridie, vel media nocte, & </
s
>
<
s
xml:id
="
echoid-s19886
"
xml:space
="
preserve
">Aequator, quibus
<
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priora quinque horologia æquidiſtant; </
s
>
<
s
xml:id
="
echoid-s19887
"
xml:space
="
preserve
">cum perpetuò tam priores tres, quàm tres
<
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poſteriores, (cõputato ſemper Meridiano tam in prioribus, quàm in poſterioribus)
<
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ſe mutuo ad angulos rectos diuidant. </
s
>
<
s
xml:id
="
echoid-s19888
"
xml:space
="
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">Quod facile ex ſphæricis elementis Theodoſij
<
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demonſtrari poteſt. </
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>
<
s
xml:id
="
echoid-s19889
"
xml:space
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">Quoniam enim tam priorum trium quilibet, quàm trium po-
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ſteriorum, per reliquorum duorum polos ducitur, vt manifeſtum eſt, ſi dictorum cir
<
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culorum poſitiones in ſphæra attente conſiderentur, ſecabit neceſſario, per propoſ.
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</
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>
<
s
xml:id
="
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<
note
position
="
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xlink:label
="
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xml:space
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">40</
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15. </
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<
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">lib. </
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<
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">1. </
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<
s
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xml:space
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">Theodoſii, illos ad angulos rectos. </
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>
<
s
xml:id
="
echoid-s19894
"
xml:space
="
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">At verò longè alia ratio eſt de circulis
<
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maximis, quibus plana horologiorum irregularium æquidiſtant, cum in eodem cli
<
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mate non habeant ſemper eundem ſitum. </
s
>
<
s
xml:id
="
echoid-s19895
"
xml:space
="
preserve
">Nam circulus maximus, cui horologiü
<
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/>
<
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position
="
right
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xlink:label
="
note-0309-09
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xlink:href
="
note-0309-09a
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xml:space
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preserve
">Circuli maxi-
<
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mi, quibus qua
<
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tuor genera ho
<
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/>
rologiorũ huius
<
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/>
lib. æquidiſtãt,
<
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/>
quomodo ſe ha
<
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/>
beant reſpectu
<
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Horizõtis, Ver-
<
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ticalis, ac Meri
<
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diani.</
note
>
à Verticali declinans ęquidiſtat, rectus quidem eſt ad Horizontem, cum per eius po-
<
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los ducatur, ſed Meridianum oblique ſecat infinitis modis, cum infinita propemo-
<
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dum genera horologiorum a Verticali declinantium reperiantur:</
s
>
<
s
xml:id
="
echoid-s19896
"
xml:space
="
preserve
">, quorum quædã
<
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magis à
<
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Verticali declinant, & </
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>
<
s
xml:id
="
echoid-s19897
"
xml:space
="
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">quædam minus. </
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>
<
s
xml:id
="
echoid-s19898
"
xml:space
="
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">Sic etiam circulus maximus, cui
<
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horologium ab Horizonte declinans parallelum eſt, rectus quidem eſt ad Vertica-
<
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/>
lem circulum proprie dictum, cum per polos ipſius incedat, at Meridianum innu-
<
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meris quoque modis oblique diuidit, prout magis, aut minus ab Horizonte
<
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<
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xlink:label
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">50</
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>
declinat. </
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>
<
s
xml:id
="
echoid-s19899
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xml:space
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">Rurſus circulus maximus, cui æquidiſtat horologium ad Hori-
<
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zontem inclinatum, rectus quidem eſt ad Meridianum, per cuius po-
<
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/>
los ducitur, ſed Horizontem ſexcentis quoque modis obli-
<
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que interſecat. </
s
>
<
s
xml:id
="
echoid-s19900
"
xml:space
="
preserve
">Poſtremo circulus maximus, cui
<
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/>
poſtremum horologium æquidiſtat, ne-
<
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/>
que ad Horizontem, neque ad
<
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/>
Verticalem, neque ad
<
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/>
Meridianum
<
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/>
rectus exiſtit, ſed omnes hos
<
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/>
circulos obliquè
<
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diuidit.</
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>
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