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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[241.] PROBLEMA 55. PROPOSITIO 55.
[242.] PROBLEMA 56. PROPOSITIO 56.
[243.] SCHOLIVM.
[244.] PROBLEMA 57. PROPOSITIO 57.
[245.] SCHOLIVM.
[246.] PROBLEMA 58. PROPOSITIO 58. HOROLOGIVM Italicum æquinoctiale conſtruere.
[247.] PROBLEMA 59. PROPOSITIO 59. HOROLOGIVM Babylonicum ęquinoctiale componere.
[248.] SCHOLIVM.
[249.] PROBLEMA 60. PROPOSITIO 60. HOROLOGIVM Antiquum æquinoctiale conſtituere.
[250.] SCHOLIVM.
[251.] FINIS SECVNDI LIBRI.
[252.] GNOMONICES LIBER TERTIVS.
[253.] AVCTORE CHRISTOPHORO CLAVIO BAMBER GENSI SOCIETATIS IESV.
[254.] DE HOROLOGIIS, QVAE A VER-ticali circulo declinant. PROBLEMA 1. PROPOSITIO 1.
[255.] SCHOLIVM.
[256.] PROBLEMA 2. PROPOSITIO 2.
[257.] SCHOLIVM.
[258.] PROBLEMA 3. PROPOSITIO 3.
[259.] SCHOLIVM.
[260.] PROBLEMA 4. PROPOSITIO 4.
[261.] SCHOLIVM.
[262.] PROBLEMA 5. PROPOSITIO 5.
[263.] PROBLEMA 6. PROPOSITIO 6.
[264.] PROBLEMA 7. PROPOSITIO 7.
[265.] PROBLEMA 8. PROPOSITIO 8.
[266.] PROBLEMA 9. PROPOSITIO 9.
[267.] SCHOLIVM.
[268.] PROBLEMA 10. PROPOSITIO 10.
[269.] PROBLEMA 11. PROPOSITIO 11.
[270.] SCHOLIVM.
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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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