Apian, Petrus
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Instrvmentvm Sinvvm, sev primi mobilis
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TABVLARVM SINVVM PER PET. APIANVM.
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eſt 233. </
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<
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<
s
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">ille ipſe gradus æquinoctialis tangit horizontem in parte occidẽtis,
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quando Mercurius in die intronizationis occidit. </
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<
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cæ aſcen dentem cum 233. </
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<
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<
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& </
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<
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<
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<
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<
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<
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<
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quod hactenus inquirebam.</
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<
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<
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<
s
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">Proiectionem radiorum per triangularem ſupputationem colligere.</
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<
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<
s
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">Nemini ignotum eſſe puto, ſextilem aſpectum ſextam circuli partem, hoc eſt 60. </
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</
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<
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">concludere, idec´ quando ſtella aliqua extra eclypticam eſt 60. </
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<
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<
s
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directe eclypticam tangit in ſuo gradu longitudinis. </
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ca maior eſt quàm 60. </
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<
s
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<
s
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">aſpectus eius ſextilis eclypticam non attingit, ſed ſi minor fue
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rit, tunc ſextilis eius aſpectus duobus locis eclypticam tangit, punctum iſtud quomodo
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cognoſces, iam tibi ediſſeram. </
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<
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<
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tudinis, minorem duc in totum, & </
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">productum diuide in maiorem, arcus quotientis de 90
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ſubductus, quaſi digito tibi commonſtrat, quot gradus de loco lõgitudinis ſtellæ in ecly-
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ptica numerare debeas antrorſum & </
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<
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lud pertingit ſextilis aſpectus ſtellæ propoſitæ, ſicut in exemplo ſubiecto patebit.</
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<
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<
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">? Quarta ſtella Agitatoris, quæ cum Sole in uno ferè poſitionis circulo fuit ipſa hora
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PLVM
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E
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intronizationis, habet in longitudine 22. </
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<
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<
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<
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</
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<
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<
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<
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<
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duco in totũ, productum diuido in 93969, in quotiente proueniunt 53215. </
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<
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eſt 32. </
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<
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<
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<
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quidem numero antrorſum ſecundum ordinem ſignorum pro radiatione finiſtra â loco
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longitudinis ſtellæ, & </
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<
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<
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<
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<
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<
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gnorum pro radiatione dextra, & </
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<
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<
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<
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<
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<
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<
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">Si autem ſcire deſide-
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ras, in quibus gradibus eclypticæ radiatio trigona ſtellæ propoſitæ finiatur, adde 90. </
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<
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arcum quotientis, & </
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<
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<
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nus deſinit aſpectus, ſic adde 90. </
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<
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<
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<
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<
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<
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<
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<
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<
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<
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ſi numeres ſecundum ordinem ſignorum antrorſum, radius trinus ſiniſter cadet ſuper
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24. </
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<
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<
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<
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<
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<
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<
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26. </
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<
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<
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<
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<
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<
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dinis ſtellæ, in quantalibet latitudine, non refert.</
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<
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<
s
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">Interuallum apparitionis aut occultationis ſtellarum in arcu eclypticæ
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ſubtiliter explorare.</
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<
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</
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<
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<
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">Arcum uiſionis dico portionem circuli maioris per uerticem regionis & </
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<
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poris Solis deducti, qui´ inter horizontem & </
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<
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tempore quo ſtella apparet ex radijs ſolaribus emergens, uel quum iam occultari incipit.
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</
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<
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<
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<
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<
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Et quia iſtæ apparitiones plurimum utiles ſunt is qui de mutationibus aëris ſcribunt,
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ideo docebo hic inuentionem diſtantiæ ſtellarum ſecundum longitudinem eclypticæ ad
<
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hoc, ut talis etiam arcus uiſionis concludatur inter horizontem & </
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<
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">corpus ſolare, prout
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ſtella propoſita ſecundum magnitudinem ſplendoris ſui expoſtulat. </
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<
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<
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<
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<
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>
<
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/>
<
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>
<
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<
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>
</
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>
neta (quando non æquali ſunt lumine omnes) peculiarem ſuum habet arcum uiſionis,
<
lb
/>
ſic ☿ gradus 10. </
s
>
<
s
xml:id
="
echoid-s7250
"
xml:space
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preserve
">habet, hoc eſt, quando Solper 10. </
s
>
<
s
xml:id
="
echoid-s7251
"
xml:space
="
preserve
">gradus in circulo altitudinis eſt ſub
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/>
horizonte, ſiue in parte orientis, ſiue occidentis, & </
s
>
<
s
xml:id
="
echoid-s7252
"
xml:space
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preserve
">☿ planè in inſo ſtat horizonte, tunc
<
lb
/>
incipit occultari, aut emergit ut uideatur. </
s
>
<
s
xml:id
="
echoid-s7253
"
xml:space
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preserve
">Arcus uiſionis ♀ eſt 5. </
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>
<
s
xml:id
="
echoid-s7254
"
xml:space
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preserve
">graduum, ♂ 11. </
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>
<
s
xml:id
="
echoid-s7255
"
xml:space
="
preserve
">gra.
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</
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>
<
s
xml:id
="
echoid-s7256
"
xml:space
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">
<
note
position
="
right
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xlink:label
="
note-0085-05
"
xlink:href
="
note-0085-05a
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">
<
emph
style
="
it
">Martis 11.</
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>
<
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<
emph
style
="
it
">gra. 30. mi.</
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>
</
note
>
30. </
s
>
<
s
xml:id
="
echoid-s7257
"
xml:space
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">mi. </
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>
<
s
xml:id
="
echoid-s7258
"
xml:space
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">♃ 10. </
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>
<
s
xml:id
="
echoid-s7259
"
xml:space
="
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">graduum. </
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>
<
s
xml:id
="
echoid-s7260
"
xml:space
="
preserve
">variant 11. </
s
>
<
s
xml:id
="
echoid-s7261
"
xml:space
="
preserve
">graduum. </
s
>
<
s
xml:id
="
echoid-s7262
"
xml:space
="
preserve
">Vnum hic exceptum haberi uolo, quòd ſi uapor
<
lb
/>
terreſtris interpoſitus ſit talis, ut per eum interdum etiam radij uiſuales franguntur, tũc
<
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/>
<
note
position
="
right
"
xlink:label
="
note-0085-06
"
xlink:href
="
note-0085-06a
"
xml:space
="
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">
<
emph
style
="
it
">Iouis gra-</
emph
>
<
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/>
<
emph
style
="
it
">duum 10.</
emph
>
</
note
>
ſtellæ apparent quæ adhuc ſub horizonte latent, nec eſt ꝙ rideas illud, ſiquidẽ naturali-
<
lb
/>
ter ita fit, quemadmodum nos docet peſpectiua. </
s
>
<
s
xml:id
="
echoid-s7263
"
xml:space
="
preserve
">At ea regula eſt ad cognoſcendum ar
<
lb
/>
<
note
position
="
right
"
xlink:label
="
note-0085-07
"
xlink:href
="
note-0085-07a
"
xml:space
="
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">
<
emph
style
="
it
">Saturni 11.</
emph
>
<
lb
/>
<
emph
style
="
it
">gra.</
emph
>
</
note
>
cum eclypticæ inter horizontem & </
s
>
<
s
xml:id
="
echoid-s7264
"
xml:space
="
preserve
">corpus ſolare contentum, qundo ſtella in </
s
>
</
p
>
</
div
>
</
text
>
</
echo
>
