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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416400GNOMONICES
SÆPIVS iam in præcedentibus declaratũ eſt, nulla in re deſcriptionem arcuum diurnorũ in
11Areus diurni
quomodo de-
ſcribantur in
eodem horolo-
gio.
quouis horologio a deſcriptione parallelorum ſignorum Zodiaci differre, ſi loco radiorum pa-
rallelorum Zodiaci accipiantur radii parallelorum arcuum diurnorum.
Vnde ſuperuacaneum e-
rit, noua hoc loco pręcepta tradere, cum ea, quæ in propoſ.
præcedenti ſcripſimus, ſufficiant. Pa-
rallelos igitur arcuum diurnorum in eodem horologio declinante ſimul &
inclinato delineaui-
mus.
Quod erat faciendum.
SCHOLIVM.
SI hic repetantur ea, quę in ſcholio propoſ. 3. huius libri tradidimus, facile deſcribere poterimus li-
neas illas horarias, quæ vix, aut nullo modo æquinoctialem lineam interſecant.
2210
PROBLEMA 40. PROPOSITIO 40.
CIRCVLOS Verticales in eodem horologio declinante ſimul
&
inclinato ſtatuere.
EXLOGO ſtyli K, ducta ad horizontalem lineam perpendiculari K B, ad quam excitetur a-
33Verticaliũ eir-
culorum in eo-
dem horologio
deſcriptio.
275[Figure 275]4420553066407750 lia perpendicularis K A, ſtylo K I, æqualis, ductaq́ue recta A B, ſumatur ei æqualis B D, in recta
K B, producta:
centro autem D, circulus deſcribatur, qui in 360. partes æquales ſecetur, uel

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