Apian, Petrus
,
Instrvmentvm Sinvvm, sev primi mobilis
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GENVINVS VSVS
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eclypticæ cũ ſinu maximæ declinatiõis ☉(sun), ꝓductũ inde diuide in totũ, ſinũ, & </
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<
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<
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declinatio medij cœli ab æquatore, quod etiã didiciſtiiam ſupra quærere in pronunciato
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5. </
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<
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<
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<
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<
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angulũ inquã illum, qui recto minor eſt, eũ inuenies, ſi ſinũ ſecundũ maximæ declinatio-
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nis tibi proponas, & </
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<
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totum, productũ in maiorẽ diuiſeris, tũc ſanè arcus quotientis erit quantitas eius angu-
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li. </
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<
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ductũ in ſinum totũ diuide, arcus quotientis oſtendet diſtantiã zenith à 90. </
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<
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<
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dente, qui arcus ſemper ad angulos rectos ſphærales ſup circulũ ma iorem ductũ ex polis
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zodiaci per zenith capitis cadit. </
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<
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<
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<
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dio cœli, & </
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<
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<
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<
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dente, & </
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<
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ctum diuide in maiorẽ, & </
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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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gradũ eclypticæ, qui occidit in parte occidentis: </
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<
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<
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manebit arcus ille diſtantiæ 90. </
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<
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dum oppoſitũ occidentis, habebis gradũ illum ꝗ oritur in oriente ſuper horizõtem. </
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<
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uero punctũ medij cœli fuerit in medietate eclypticæ deſcendenti, tũc adde arcũ quotien
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tis ad medium cczli, & </
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<
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cæ occidens in parte occidentis. </
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<
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has à gradu medij cœli, tunc manet gradus 90. </
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<
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mus ſiue altiſsimus exiſtit eclypticæ gradus ſupra horizontẽ, nõ ille (ut imperiti putãt)
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PLVM
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qui tangit mediũ cœli ?</
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<
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facilius intelligas. </
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<
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gradus ille fuit 15. </
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<
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<
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<
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xi in ſinũ maximæ declinatiõis, ꝓductũ diuiſi in ſinũ totũ, & </
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<
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11435, arcus eius 6, gra, 34. </
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<
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& </
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<
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">meridiani, multiplicando ſinũ cõplementi maximæ declinatiõis ☉(sun) 91706. </
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<
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nu, & </
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<
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<
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iã inuenio 92312. </
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<
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<
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<
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<
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diano orientalis Borealis. </
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<
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zenith à puncto medij cœli, ſcilicet 66 174. </
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<
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<
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tiente inuenio 6 1084. </
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<
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<
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<
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à 90. </
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<
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<
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<
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uem in locũ diuiſoris, & </
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<
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<
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nith à medio cœlo, ducã in ſinũ totũ, & </
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<
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ti in quotiente 94691. </
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<
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<
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<
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<
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<
s
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ſignorũ ordinem à puncto medij cœli, finietur arcus in 5. </
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<
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<
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<
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<
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occidens in parte occidentis ipſo tempore iutronizationis, 5. </
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<
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<
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<
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ſcendens quem quærebam. </
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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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<
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<
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">& </
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<
s
xml:id
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">tantum quidem diſtat gradus ille 90. </
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<
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">ab aſcendente à medio cœli uerſus or-
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tum, ſi autem addas medium cœli, puta 16. </
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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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planè 5. </
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<
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<
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<
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<
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<
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1
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<
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xml:space
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">PRONVNCIATVM XXXI.</
head
>
<
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<
s
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echoid-s2557
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xml:space
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preserve
">Angulum ab horizonte obliquo cum eclyptica cauſſatum, per expeditam
<
lb
/>
ſupputationem cognoſcere.</
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>
<
s
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echoid-s2558
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"/>
</
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<
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<
s
xml:id
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echoid-s2559
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xml:space
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">Inuento iam gradu aſcendente ex 30. </
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>
<
s
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echoid-s2560
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="
preserve
">ꝓnunc. </
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>
<
s
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="
echoid-s2561
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xml:space
="
preserve
">quære deinceps per aliquã ex tribus illis
<
lb
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pronunc. </
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>
<
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echoid-s2562
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xml:space
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">26. </
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>
<
s
xml:id
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xml:space
="
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">27. </
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>
<
s
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echoid-s2564
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xml:space
="
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">aut 28. </
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>
<
s
xml:id
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echoid-s2565
"
xml:space
="
preserve
">angulũ quẽ effecit eclyptica præciſe in gradu aſcendentis cũ me
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lb
/>
ridiano uerſus orientẽ. </
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>
<
s
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echoid-s2566
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xml:space
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preserve
">Porrô aũt ubi ſcire cupis etiam illũ angulũ, quem facit eclyptica
<
lb
/>
in ipſo puncto aſcendentis cum horizonte, tunc tibi propone ſinum cõplementi declina
<
lb
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left
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xlink:label
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note-0046-06
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note-0046-06a
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<
emph
style
="
it
">Arealis in-</
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>
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<
emph
style
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it
">greſſus.</
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>
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>
tionis illius gradus eclypticæ, ſimiliter & </
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>
<
s
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echoid-s2567
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xml:space
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">ſinũ eleuationis poli, minorẽ ex ijs duc in ſinũ
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totũ, productũ diuide in ſinũ maiorẽ, & </
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>
<
s
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="
echoid-s2568
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xml:space
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preserve
">arcũ quotientis dico angulũ cõmunem, id'´ eo
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lb
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maxime, qñ ſi punctũ illud eclypticæ aſcendens, uel penes quod angulum horizontis &</
s
>
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s
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