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# Title: [Astronomiae Physicae & Geometricae Elementa] Astronomiæ Physicæ & Geometricæ Elementa (shelfmark Leibn. Marg. 124)
# Folio 163, page id 1040780814:0181
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E EFFOME TRFOA R PEMEN F A.
labente ceipore, quo Fixa quaeris a Meridiano digresta ad cundem
rerertitur, quod die naturali paulo est brevius. Hlorolosii sic ordi-
nati index ad initium numerationis constitmatur, dum Sol Meridi.
anum attineie, e notetur hora ab FTorolosio numerata, quando
Fixa, cujus ACcensio Recta quaeritur, cundem attingit. FTOrX Ca-
rumque partes de indico numeratae in LE quatoris gradus _ illo
rum PaTtCS CONreCLantuE, ut Supra est dictum: Prodibit interrallum
Ascenionum Reclarum F’ixx _ Solis; hoc vero additum AsCenSi-
ont Lectae Solis exHibet Fixa Ascensionem Rectam qua SIFaM.
Si vero, in Autotnato ad motum Fixx diurnum ordinato, loco24.
horarum OstenCantuE 360 gradus horumque partes seraselima,
e, dum Sol est iu Meridiano, indices Ratuantur ad numerum ora-
duum e scrupulorum, ex quibus Solis Acentio Recta tum constat;
ostendent hi absque ulteriore reductione) Ascentionem ReetAM
Fixa, cum haec Meridianum attinsit.
PROFOSTTIO XX
Mis Dectiratione Ce Ascensione Recta unius Syderis, e De
Cinatione alterius una cum Srderum Distantia, posterioris hu
us Ascensionem Rectam invenire; e e converso, Srderum, quorum
Ascensiones Rectae ( Dectinationes dantur, Distantiam invenire.
Reterat E. e Aquatorem, cujus Polus e; sintque Sydera A e B,
ex quorum Declinationibus ca, DB datis dantur horum comple.
menta sire distantia a Polo, nempe P A, PB, daturque etiam (ex hy.
Pothesi) Syderum distantia a B. Ouare in trian.
sulo APB, datis lateribus inrenietur ansulus
AP B, eE proinde ejus mentura cD arcus; diste-
rentia nempe Alcensionum Rectarum Syderum
a e B, qua proinde addita vel subducta AICen
tioni Recta data unius, (prout circulus Declina-
tionis per hoc trantiens eA ad ortum vel occa-
Cum circuli Declinationis per illud transcuntis,)
dat alterius Alcentionem Rectam guasitam.
E converso, datis Syderum a ec B Ascentionibus Rectis, datur ha-
rum differentia cD; hoc cA, ansulus c PB, cujus ilto arcus est men-
Tura: _ in triansulo a PB, dantur latera P A, PB datarum Declina-
tionum complementa, una cum ansulo comprehenso AP B: inveni-
entur isitur reliqui ansuli, et latus a B Syderum Distantia quasita.
Pariterque duorum in Telluris superficie Locorum, quorum L on
situdines ex Laticudines dantur, invenientur Distantia in circulo
maximo computata, et ansuli quos hic (qui communi Arimutho
Caeletti relpondet) cum ueroque Meridiano continet.
PROPOSTTIO XXV.
ae scnsionem Rectam per observationes determi
hare, m Fhaenomeno interdi  noctu conspicuo.
Obserretur Chaenomeni diu noctuque comspicui Declinatio (pet
erOP.