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

Table of contents

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[211.] SCHOLIVM.
[212.] PROBLEMA 36. PROPOSITIO 36. HOROLOGIVM Antiquum Meridianum conſtituere.
[213.] SCHOLIVM.
[214.] DE HOROLOGIIS POLARIBVS. PROBLEMA 37. PROPOSITIO 37.
[215.] SCHOLIVM.
[216.] PROBLEMA 38. PROPOSITIO 38.
[217.] PROBLEMA 39. PROPOSITIO 39.
[218.] PROBLEMA 40. PROPOSITIO 40.
[219.] PROBLEMA 41. PROPOSITIO 41.
[220.] PROBLEMA 42. PROPOSITIO 42.
[221.] PROBLEMA 43. PROPOSITIO 43.
[222.] PROBLEMA 44. PROPOSITIO 44.
[223.] SCHOLIVM.
[224.] PROBLEMA. 45. PROPOSITIO 45.
[225.] SCHOLIVM.
[226.] PROBLEMA 46. PROPOSITIO 46.
[227.] PROBLEMA 47. PROPOSITIO 47.
[228.] SCHOLIVM.
[229.] PROBLEMA 48. PROPOSITIO 48.
[230.] SCHOLIVM.
[231.] DE HOROLOGIIS ÆQVINOCTIALIBVS. PROBLEMA 49. PROPOSITIO 49.
[232.] SCHOLIVM.
[233.] PROBLEMA 50. PROPOSITIO 50.
[234.] SCHOLIVM.
[235.] PROBLEMA 51. PROPOSITIO 51.
[236.] PROBLEMA 52. PROPOSITIO 52.
[237.] SCHOLIVM.
[238.] PROBLEMA 53. PROPOSITIO 53.
[239.] SCHOLIVM.
[240.] PROBLEMA 54. PROPOSITIO 54.
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page |< < (168) of 677 > >|
188168GNOMONICES henſa inter aliud centrũ L, (ex quo nimirum alius circulus in prædicto horologio deſcriptus fuit, & in par
tes ęquales 24.
diſtributus) & horas in æquinoctiali linea I K, imprimẽdo puncta in ipſa G H. Poſtremo
per bina ſemper puncta reſpondentia in rectis D C, C H, rectæ lineę ducantur, Hę etenim dabunt horarias
137[Figure 137]1110222033304440 lineas, nõ aliter, at q;
in figura radiorum Zodiaci huius propoſ. quarũ interualla inter radium Aequatoris
D C, &
radios aliorum ſignorũ translat a in reſpondentes lineas horarias in horologio ab ipſa æquinoctiali
linea C D, dabunt in horarijs lineis puncta, per quæ ſignorum arcus ducendi ſunt;
Vt ex ijs, quæ ſupra de-
monſtrata ſunt, perſpicuũ eſt.
Nam recta G H, eſt alius radius Aequatoris pro minori horologio deſcriben
5550 do, cuius nimirum æquinoctialis linea I K, &
axis A G. Vnde ſi in axe D G, huius proximę figuræ ſume-
retur ex D, recta æqualis axi F A, in horologio, vel ex G, æqualis axi G A, terminaretur vtraque in eo-
dem puncto, ex quo rectæ ductæ per puncta tam radij Aequatoris D C, quàm G H, exhiberent lineas ho-
rarias, non ſecus, ac in figura radiorum Zodiaci huius propoſ.
Quare neceſſe eſt, haſce lineas horarias trã-
ſire per puncta inuenta in vtroque radio Aequatoris, &
c. Quòd ſi ex D, ad proximam lineam horariam,
nempe ad lineam horæ 12.
ducatur perpendicularis linea, dabit hæc longitudinem ſtyli: locus verò eius
erit punctum in meridiana linea tantum diſtans ab ęquinoctiali linea ſurſum verſus, quantum àradio
Aequatoris D C, remouetur punctum, in quod ſtylus ex D, cadit ad angulos rectos in lineam horę 12.
Cæterum in translatione interuallorum ex radio Aequatoris in horologium ſeruandus eſt hic ordo, vt in-
terualla linearum horariarum verſus illam partem, in quam cadit ſtylus ex D, transferantur à linea æqui
noctiali ſurſum verſus, &
c.

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