Clavius, Christoph, In Sphaeram Ioannis de Sacro Bosco commentarius

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[111.] Omnes ſtellæ 12. Tertiæ magnit. 2. Quartæ 6. Quintæ 4.
[112.] IN PLAGA ERGO AVSTRALI STELLÆ omnes 316. Primæ magnitud. 7. Secundæ 18. Tertiæ 60. Quar-tæ 168. Quintæ 53. Sextæ 9. Neb. 1. IN TOTO AVTEM FIRMAMENTO STELLÆ omnes, præter tres in cincinno. 1022. vt ſupra dictum eſt.
[113.] VSVS PRÆCEDENTIS TABVLAE.
[114.] DE STELLARVM DECLINATIONIBVS inueſtigandis.
[115.] DE QVANTITATE STELLARVM.
[116.] Proportiones diametrorum ſtellarum omnium ad diametrum terræ.
[117.] Quoties diameter cuiuſuis ſtellæ diametrum terræ, uel diameter terræ diametrum ſtellæ in ſe contineat.
[118.] Proportiones magnitudinum ftellarum omnium ad magnitudinem terrę.
[119.] Quoties magnitudo cuiuſuis ſtellæ magnitudinem terræ, uel magnitu-do terrę magnitudinem ſtellæ in ſe contineat.
[120.] TERRAM ESSE IMMOBILEM.
[121.] COMMENTARIVS.
[122.] COMMENTARIVS.
[123.] DE AMBITV TERRAE.
[124.] COMMENTARIVS.
[125.] COMMENTARIVS.
[126.] VIÆ AD INVESTIGANDVM AMBITVM TERRÆ commodiores, quàm ea, quæ ab auctore tradita eſt.
[127.] COMMENTARIVS.
[128.] REGVLA, QVA DI AMETER EX CIRCVNFE-rentia, & circumferentia ex diametro inueniatur.
[129.] REGVLAE, QVIBVSET SVPERFICIES MA-ximi circuli in orbe terreno, uel etiam in quacunque ſphæra, & ſuperficies conuexa eiuſdem orbis terreni, uel etiam cuiuſque ſpære, immo, & tota ſoliditas inueniatur.
[130.] DE VARIIS MENSVRIS Mathematicorum.
[131.] VARIÆ SENTENTIÆ AVCTORVM in ambitu terræ præfiniendo.
[132.] DISTANTIÆ COELORVM A TERRA, craſſitudinesq́ue, & Ambitus eorundem.
[133.] DIGRESSIO DE ARENAE NVMERO.
[134.] PRIMI CAPITIS FINIS.
[135.] CAPVT SECVNDVM DE CIRCVLIS, EX QVIBVS SPHAERA materialis componitur, & illa ſupercæleſtis, quæ per iſtam repræſentatur, componi intelligitur.
[136.] COMMENTARIVS.
[138.] II.
[139.] III.
[140.] IIII.
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12083Ioan. de Sacro Boſco. turq́ue rectangulum B E F C, quod erit duplum trianguli A B C; Item duplũ
1141. primi. rectanguli A D B E.
Quare rectangulum A D B E, quod nimirum continetur
2236. primi. ſub perpendiculari A D, &
dimidio baſis B D, æquale eſt triangulo A B C. Di
uidat
ſecundo perpendicularis A D, baſim B C, non bifariam, uel etiam ca-
dat
in baſim C B, protractam, ut in 2.
& 3. figura; Et per A, ducatur rurſus
A
F, in utramque partem æquidiſtans rectæ B C, compleaturq́ue rectangulũ
A
D C F.
Diuiſa deinde B C, bifariam in G, ducantur rectæ B E, G H, ipſi
A
D, æquidiſtantes, eritq́ue G H, æqualis perpendiculari A D.
Quoniam igi-
3334. primi. tur rectangulum B C E F, duplum eſt trianguli A B C;
Item duplum rectangu
4441. primi. li B E H G;
erit rectangulum B E H G, quod continetur ſub perpendiculari
5536. primi. G H, uel A D, &
dimidio baſis B G, æquale triangulo A B C. Area igitur cu-
iuslibet
trianguli æqualis eſt, &
c. quod erat oſtendendum.

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