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# Title: Nicolai Mercatoris Holsati, è Soc. Reg. Institutionum Astronomicarum Libri Duo, De Motu Astrorum Communi & Proprio, Secundum Hypotheses Veterum & Recentiorum præcipuas; Deqve Hypotheseon ex observatis constructione (shelfmark Leibn. Marg. 63)
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APPENDIX.
non morum proderent) difficile aucumat inventu, cum Venus
exiouo tancum cemporis spacio contemplandam se prabeat.
eoliro tamen, lucidam, quam (aepius obserraverac partem,
eandem semper fuisse, morum hunc 23 circicer horis absolvi,
auder aftirmare, quibus completis eadem pars lucida ad eun-
dem (ITUM reverTaTUI.
Seprimo. De Cnna. Observatum est, quod praetermo-
cum in longicudinem se laticudinem, qualem Lib. Il. Sect. 2.
expoluimus, habeat quoque varias libraciones cirea sui cen
erum, quibus macula cransteruntur a medio orbe in ortum,
occalum, septentrionem e auttrum; _ dum alix ex parre
illuminara exanseunt in obscuram, alix contra emergune ex ob.
scura, e in lucidam concedune. Achibiro globocerrectri,
ec eleraro polo boreo ad ipsum Z enich, elige insulam quan-
dam sub aequarore (icam, v. Br. D. Thoma, quam ips cardine
dustri adjunges, ubi Meridianus sorizontem lecat, _ Ocu-
lum cenebis in recta a centro per dictam insulam continuata
Cum cosicaro, hanc insulam reterre maculam Lunarem in ipso
centro discipolicum; _e voluro globo vertus linistram, denec
Intula seprem circirer gradus conficiat in Horizonce, videbis
omnes reliquas parres relluris conspicuas eodem motu vergere
In Orrum. Mox reducta insula ad Meridianum, e porro ad
dextram seprem gradibus, ridebuntur omnes parres elobi con-
spicux versere in occalum. Talis est librario Lunae in orrum
_ occasum, qua absolvicur, dum Luna ab APosCO redit ad
Apoecon, perambulans octaram circirer parrem diamerri Lu-
narIS PrOPE CenErUM. Rursus dictam insulam pone sub Meri-
digno, _c fxoglobo, move volum ultra e ciera verricem ad
seprem vel octo graduum ab eo distanciam; cum videbis, e
insulam, ∞ reliquas parres globi nunc in seprentrionem absce-
dere, nunc rursus in austrum nucare. Arque hujusmodi est li-
brario Lunae in sextenerionem _ austrum, quxe absolvicur, dum
Luna a Nodo ascendenre reverritur ad cundem, e qua nOr
inepre vocaveris librationem in latum, est que priori illa in lon-
sum aliquanto major. Caeterum txe sux librationes L. unx sune
lolurxe, nullieum sole congressui alligata, quinquam earum
Prie