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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ad meridiem, cum ad Meridianum circulum vergat in hemiſphærio ſuperno; </
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<
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<
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choanda erit à punctis e, & </
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<
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<
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<
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<
s
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xml:space
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nunc pro horologio boreali totum auſtrale, ſi ex ſuperiori parte fiat inferior, ita vt centrum H, in-
<
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fra horizontalem lineam contineatur. </
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<
s
xml:id
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xml:space
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<
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xml:space
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<
s
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tia ad 22. </
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<
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<
s
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xml:space
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<
s
xml:id
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xml:space
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">Memor autem eſto, in horeali horologio tropicum ♋, eſſe inter centrũ
<
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<
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H, & </
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>
<
s
xml:id
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xml:space
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">æquinoctialem lineam. </
s
>
<
s
xml:id
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"
xml:space
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">Exemplum huius deſcriptionis in horologio auſtrali habes in hora
<
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14. </
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<
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xml:space
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">tropici ♋, & </
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>
<
s
xml:id
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xml:space
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">hora 13. </
s
>
<
s
xml:id
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xml:space
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">tropici ♑. </
s
>
<
s
xml:id
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"
xml:space
="
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">Nam ex f, puncto horæ 14. </
s
>
<
s
xml:id
="
echoid-s15817
"
xml:space
="
preserve
">tropici ♋, ducta recta per E, cen
<
lb
/>
trum ſecat lineam æquinoctialem in puncto quodam, per quod ducta ex centro H, recta oſtendet
<
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/>
in tropico ♋, punctum h, pro hora 14. </
s
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<
s
xml:id
="
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xml:space
="
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">Rurſus recta ex m, puncto horæ primæ nocturnæ tropici
<
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♑, quæ horæ 13. </
s
>
<
s
xml:id
="
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xml:space
="
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">opponitur, ducta per E, occurrit æquinoctiali lineæ in n. </
s
>
<
s
xml:id
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"
xml:space
="
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">Et quia linea m E, du-
<
lb
/>
cta ab hora prima nocturna ♑, tranſit per centrum E, antequam æquinoctialem lineam ſecet, id-
<
lb
/>
circo recta H n, in tropico ♑, exhibet punctum q, pro hora prima nocturna ♑, producta verò vl-
<
lb
/>
tra centrum H, offert in eodem tropico punctum p, pro hora 13. </
s
>
<
s
xml:id
="
echoid-s15821
"
xml:space
="
preserve
">vt demonſtrauimus propoſ 10.
<
lb
/>
</
s
>
<
s
xml:id
="
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"
xml:space
="
preserve
">huius libri. </
s
>
<
s
xml:id
="
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"
xml:space
="
preserve
">In horologio boreali nullum exemplum poſuimus, ne multitudo linearum confuſio-
<
lb
/>
nem pareret: </
s
>
<
s
xml:id
="
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"
xml:space
="
preserve
">præſertim quia facile ex auſtrali deducirur, vt in ſcholio ſequentis propoſ. </
s
>
<
s
xml:id
="
echoid-s15825
"
xml:space
="
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">dicemus. </
s
>
<
s
xml:id
="
echoid-s15826
"
xml:space
="
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">
<
lb
/>
Tranſibunt autem hic quoque lineæ horarum ab occ. </
s
>
<
s
xml:id
="
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"
xml:space
="
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">per horas à mer. </
s
>
<
s
xml:id
="
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"
xml:space
="
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">vel med noc. </
s
>
<
s
xml:id
="
echoid-s15829
"
xml:space
="
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">æquinoctialis
<
lb
/>
<
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position
="
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xlink:label
="
note-0252-04
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xlink:href
="
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xml:space
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">40</
note
>
lineæ, vt propoſ. </
s
>
<
s
xml:id
="
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xml:space
="
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">10. </
s
>
<
s
xml:id
="
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xml:space
="
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">huius lib. </
s
>
<
s
xml:id
="
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"
xml:space
="
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">diximus. </
s
>
<
s
xml:id
="
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"
xml:space
="
preserve
">Cæterum in hac figura non aſcripſimus numeros hora-
<
lb
/>
rum à mer. </
s
>
<
s
xml:id
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xml:space
="
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">vel med. </
s
>
<
s
xml:id
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xml:space
="
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">noc. </
s
>
<
s
xml:id
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xml:space
="
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">quia ex figura propoſ. </
s
>
<
s
xml:id
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xml:space
="
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">13. </
s
>
<
s
xml:id
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xml:space
="
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">huius lib. </
s
>
<
s
xml:id
="
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"
xml:space
="
preserve
">facile intelligitur ordo huiuſmo-
<
lb
/>
di horarum.</
s
>
<
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xml:space
="
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"/>
</
p
>
<
p
>
<
s
xml:id
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xml:space
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">IN Secundo modo, qui ſit per arcus diurnos nocturnosq́ue, nulla eſt difficultas, ſi rectè con-
<
lb
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<
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position
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xlink:label
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xlink:href
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xml:space
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">Alia de@criptio
<
lb
/>
horologii Itali
<
lb
/>
ci Verticalis per
<
lb
/>
@tcus diurnos,
<
lb
/>
@octurnosq́;.</
note
>
ſiderentur tabulæ in ſcholio propoſ. </
s
>
<
s
xml:id
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xml:space
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">33. </
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<
s
xml:id
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xml:space
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">ſuperioris lib. </
s
>
<
s
xml:id
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xml:space
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">poſitæ: </
s
>
<
s
xml:id
="
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"
xml:space
="
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">ſed deſcribendus etiam erit in ho-
<
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rologio auſtrali arcus nocturnus horarum 24. </
s
>
<
s
xml:id
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xml:space
="
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">cum eius ope & </
s
>
<
s
xml:id
="
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xml:space
="
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">auxilio facilis reddatur deſcriptio
<
lb
/>
horologii Italici. </
s
>
<
s
xml:id
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xml:space
="
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">Ducitur enim hora 24. </
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>
<
s
xml:id
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xml:space
="
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">ab occaſu per horam quintam à meridie in arcu diur-
<
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no horarum 10. </
s
>
<
s
xml:id
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xml:space
="
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">& </
s
>
<
s
xml:id
="
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"
xml:space
="
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">per horam 12. </
s
>
<
s
xml:id
="
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"
xml:space
="
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">à media nocte in arcu nocturno horarum 24. </
s
>
<
s
xml:id
="
echoid-s15853
"
xml:space
="
preserve
">qui eſt parallelus
<
lb
/>
ſemper latentium maximus, ſecatq́ue horam 12. </
s
>
<
s
xml:id
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xml:space
="
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">à media nocte, quæ eſt hora 12. </
s
>
<
s
xml:id
="
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"
xml:space
="
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">meridiei, in loco
<
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/>
ſtyli. </
s
>
<
s
xml:id
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xml:space
="
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">Eſt autem hora 24. </
s
>
<
s
xml:id
="
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xml:space
="
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">ab occaſu parallela lineæ æquinoctiali, cum eadem ſit, quæ horizontalis
<
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<
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linea, quam in ſcholio propoſ. </
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>
<
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xml:space
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">22. </
s
>
<
s
xml:id
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"
xml:space
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">ſuperioris lib. </
s
>
<
s
xml:id
="
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"
xml:space
="
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">parallelam eſſe æquinoctiali lineæ oſtendimus.
<
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/>
</
s
>
<
s
xml:id
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xml:space
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">At hora 23. </
s
>
<
s
xml:id
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xml:space
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">tranſit per horam 4. </
s
>
<
s
xml:id
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xml:space
="
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">à meridie in arcu diurno horarum 10. </
s
>
<
s
xml:id
="
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"
xml:space
="
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">& </
s
>
<
s
xml:id
="
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"
xml:space
="
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">per horam quintam à
<
lb
/>
meridie in arcu horarum 12. </
s
>
<
s
xml:id
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"
xml:space
="
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">quem in auſtrali horologio tota æquinoctialis linea præbet. </
s
>
<
s
xml:id
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xml:space
="
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">Immo
<
lb
/>
quia hora 23. </
s
>
<
s
xml:id
="
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"
xml:space
="
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">ab occaſu producta vltra parallelum ſemper latentium maximum, ſeu arcum no-
<
lb
/>
cturnum horarum 24. </
s
>
<
s
xml:id
="
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"
xml:space
="
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">fungitur munere horæ 23. </
s
>
<
s
xml:id
="
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xml:space
="
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">ab ortu, vt in ſcholio propoſ. </
s
>
<
s
xml:id
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xml:space
="
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">10. </
s
>
<
s
xml:id
="
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"
xml:space
="
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">huius lib. </
s
>
<
s
xml:id
="
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"
xml:space
="
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">oſten
<
lb
/>
dimus, idcirco vides lineam horæ 23. </
s
>
<
s
xml:id
="
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"
xml:space
="
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">ab ortu ita productam tranſire per horam 6. </
s
>
<
s
xml:id
="
echoid-s15875
"
xml:space
="
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">à media nocte
<
lb
/>
in arcu nocturno horarum 14. </
s
>
<
s
xml:id
="
echoid-s15876
"
xml:space
="
preserve
">& </
s
>
<
s
xml:id
="
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"
xml:space
="
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">ſic de cæteris. </
s
>
<
s
xml:id
="
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"
xml:space
="
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">Hora autem 13. </
s
>
<
s
xml:id
="
echoid-s15879
"
xml:space
="
preserve
">ab occaſu, quia non habet pun-
<
lb
/>
ctum reſpondens in arcu diurno horarum 10. </
s
>
<
s
xml:id
="
echoid-s15880
"
xml:space
="
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">ducta eſt per horam ſextam à media nocte in
<
lb
/>
arcu nocturno horarum 14. </
s
>
<
s
xml:id
="
echoid-s15881
"
xml:space
="
preserve
">Hora denique 12. </
s
>
<
s
xml:id
="
echoid-s15882
"
xml:space
="
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">ab occaſu ducenda eſt per horam 12. </
s
>
<
s
xml:id
="
echoid-s15883
"
xml:space
="
preserve
">à meridie,
<
lb
/>
hoc eſt, per horam 12. </
s
>
<
s
xml:id
="
echoid-s15884
"
xml:space
="
preserve
">mediæ noctis, in arcu nocturno horarum 24. </
s
>
<
s
xml:id
="
echoid-s15885
"
xml:space
="
preserve
">& </
s
>
<
s
xml:id
="
echoid-s15886
"
xml:space
="
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">æquidiſtans lineæ </
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>
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