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# Title: [Observationes Diametrorum Solis Et Lunae Apparentium, Meridianarumque aliquot altitudinum Solis & paucarum fixarum] Observationes Diametrorum Solis Et Lunæ Apparentium, Meridianarúmque aliquot altitudinum Solis & paucarum fixarum (shelfmark Leibn. Marg. 130)
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P
LIB. I. Observariones Diamerri Solis apparentis.
OBSERYAFTO QUARTA.
Hno Christi Gregoriano 1661: Dic 26 Seprembris, Lugduni, post meridiem.
L Soleclaristimo, sed mulcum crepidante, numerare lunr Perpendiculi ribratio-
nes simplices Sepries 338, ec Sepries 339.
Medio numero 338. = congruie arcus scrupulorum 3i 54, quem centrum Solis
interim percurrebat in suo Parallelo. Nam,
Vi numerus simplicium vibrationum horariu
Ad mocum Solis horarium circa polos E quaroris
Jea numeratae simplices vibrationes
p
Ad arcum interea peragratum a cenero Solis in suo Parallelo
03154.
E.A aurem hic idem arcus Diamerer Solis apparens in plano eju(dem Paralleli, cu
jus semistis est scrup. 25 57: de distantia Solis à polo  quatoris cst grad. 88 34:
Onde sequicur Cemidiameter Solis apparens (crup. 15 56 =. Iam,
Dt sinus totus
Ad sinum distantiae Solis à polo Ae quatoris
Ita sinus semidiametri Solis apparentis in plano Paralleli
grad. 1 n Locarithmi.
Ad sinum semidiametri Solis apparentis in plano maximi
Sphaera circuli
02556 = 7,6663514
Ergo Diameter Solis apparens erar Ccrup. 3 i53. Ouam cognolcere lacageba
InUS.
Est autem noiam dienum; quod ex apparenti semidiamerro Solis Apocao, es Perieao
ut supra: ernicur distancia Solis Apocaei a terra partium 101562: e5 Perigai 98438:
quarum distantia media est 100000; et inde Excentricitas parrium solummodo 1562)
quae paulo minor est dimidia Excentricitare, quam passim Astronomi ex observationibus
locorum Solis in FCliprica colligunt: ex quo apparet, eos, non prorsus inepte agere, qut
Excentricitatem Solis bissecant.
Non alirer demonstrabitur Solis Diameter apparens in quocumque ExCenEricI 10.
co: qui modus quantam praebeac ob serratori cum certicudine Facilitarem, nemo non
videc. Sed incerim haec exempla sufticiunc. Ouamobrem reliquas omnes hujusmode
oblerrationes, quas inera biennium peresimus cap. 3. libri 2. eradendas re serramus.
ue inde ramquam ex prompruario educantur, cum quis Adem illarum voluerie expe-
riri. Sed jam Lunari Diameero indasanda praestar eoris viribus incumbere: et quian
qua persimus via, eam ab (que Lunarium moruum cognirione scire nOn pOsumUS :
deo nunc iis subducendis serid arrendamus.
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