Apian, Petrus
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Cosmographia
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049
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49
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GRAPH. PETRI APIANI.
"/>
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<
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>
<
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<
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s
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<
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xml:space
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">ix.
<
lb
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</
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<
s
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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 quintam eiuſdem, horam æquinoctialem pro die
<
lb
/>
oblato, & </
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<
s
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xml:space
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">temporis eodé momento in quo meridianam
<
lb
/>
lineam ducere velis. </
s
>
<
s
xml:id
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xml:space
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">Filo ſic liberè dependente, trigono´q; </
s
>
<
s
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xml:space
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">inuariato
<
lb
/>
manente, ſiſte pedem circini in punctum trigoni, cui filum perpen-
<
lb
/>
diculi innectitur, & </
s
>
<
s
xml:id
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xml:space
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">alio extento in notam interſectionis perpendi-
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lb
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culi, & </
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>
<
s
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xml:space
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">lineæ æquidiſtantis ſigni aut grad. </
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<
s
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">Solis, pro dato die, hoc eſt,
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in punctum horæ iam inuentæ, & </
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<
s
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xml:space
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">eam circini extenſionẽ immotam
<
lb
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ſerua. </
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>
<
s
xml:id
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xml:space
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">Deinde ingredere præcedens inſtrumentum, & </
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>
<
s
xml:id
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echoid-s1403
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xml:space
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">ſupputa altitu
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lb
/>
dinem Solis per propoſitionem primam Noni inuentam in ſcalis al
<
lb
/>
tudinũ, & </
s
>
<
s
xml:id
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xml:space
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">imprime notas, quibus cordam ſubtilem, regulamentum,
<
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aut occultam lineam ſuperextendito. </
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<
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xml:space
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">In punctũ igitur limbi & </
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<
s
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xml:space
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">cor-
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/>
dæ attactus, in parte dextra pes vnus circini immittatur, & </
s
>
<
s
xml:id
="
echoid-s1407
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xml:space
="
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">circino
<
lb
/>
inuariato deſcribe circulum occultum verſus ſiniſtram vſq; </
s
>
<
s
xml:id
="
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xml:space
="
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">ad con-
<
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/>
tactum cordę aut regulæ, ibiq́; </
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>
<
s
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xml:space
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">pinge notam, mox enim illa inter cir
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culos verticales, ſeu azimuthales, optatũ azimuth indicabit. </
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>
<
s
xml:id
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xml:space
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">Habito
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gradu verticali, ſeu azimuthali, accipe aſſerem æqualis ſuperficiei & </
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s
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<
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/>
politè quadratum, cuius ſingula latera in duas ęquas partes diuidito. </
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<
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Sint itaq; </
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<
s
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xml:space
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">diuiſionis notæ, A B C D, & </
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<
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xml:space
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">A C, B D, rectis connectantur
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lineis, quæ ſe inuicem diſpeſcant in. </
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>
<
s
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xml:space
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">E, ſigno, ad rectos angulos. </
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>
<
s
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xml:space
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">erit
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itaq; </
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<
s
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">ſignum orientis. </
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<
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">C. </
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<
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">occidentis. </
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<
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">A. </
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<
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<
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">D, verò ſeptentrio
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nis. </
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<
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">Deinde diſtenſis circini pedibus, ex. </
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<
s
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xml:space
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">E, centro quantumuis deſcri
<
lb
/>
be circulum, qui orthogonali linearum ſectione in quatuor quadran
<
lb
/>
tes ſecetur, Eaſdem deniq; </
s
>
<
s
xml:id
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xml:space
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">quartas diuide more Aſtronomico in par
<
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tes ſeu gr. </
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<
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<
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<
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xml:space
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<
s
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<
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/>
Tandem ad æquidiſtantiam horizontis coaptabis aream planam, ſu
<
lb
/>
per quam pone quadratũ illud, ita vt. </
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>
<
s
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xml:space
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">B, punctum verſus meridiem,
<
lb
/>
D, verò Septentrionem verſus porrigatur. </
s
>
<
s
xml:id
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xml:space
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">Poſt hæc verifica quadra-
<
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/>
tum, donec vmbra ſtili ſuper gradum verticalem prius ex radijs ſo-
<
lb
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laribus obſeruatum coincidat. </
s
>
<
s
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">Et latus. </
s
>
<
s
xml:id
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xml:space
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">A, aut oppoſitum aſſumitur
<
lb
/>
pro vera linea meridiana. </
s
>
<
s
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">Cui adiungitur regulamentum, & </
s
>
<
s
xml:id
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xml:space
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">agatur
<
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linea infinitæ longitudinis, quod oportebat inuenire.</
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<
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33
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