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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)
# Folio 20, page id 820424455:0042
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ASTRONOMIA.
Lib. L.
majores, adeoque dies ad Propicum ulque rectirum continuo
ineremento noctes exuperane. Contrarium evenir, cum Sol
ab sequarore verlus Tropicum hybernum descendit. HiC
non abs re fuerit, notare quaruor anni rempeltatum ditte-
rentias: nam ab xquinoctio verno ad solstirium aestirum,
dies lonsiores sune noctibus, ex augentur continuo; inde
a Colctirio astiro ad aequinoctium ancumnale, longiores
eciamnum sune dies noctibus, sed decrescunt; mox ab
xequinoctio aucumnali ad Collticium hybernum, decrescunt
adhuc dies, sed breviores cradunnoctibus; denique à (ol-
Stiriohyberno ad requinoctium vernum, breviores adhue sune
dies noctibus, sed rursus ausentur. Crepascula quoque
proprer obliquum solis descensum, diucius prorratuntur,
quam in Sphaera recta, ita ut alicubi per aeltatem toras noctes
ourene, veluri in suecia, ubi vel ipso noctis meridie librum
absque lucerna legas, quoniam sol ibi carde nec adeo pro-
tunde sub Horizoncem demergitur. Sed _, Contra quam
ance, heri porest, ut Polus Pab Hlorizonte O continno
elerecur magis magilque, donec incidat in ipsum verricem L,
atque cum  punctum quatoris deprimitur usque in H,
ec Oconra eleratur in O, rocusque Equator congruit 10.
rizonci, e paralleli omnes Equatoris, lunt quoque paral-
leli Horizonti, qui policus
Sphaerae est parallelus, vide Fis.
V; ubi Sol pexlustrans signa
Lodiaci cis A. quarorem, atque
adeo supra Horizoncem lita
perpetua circumrolutione de
Ccribit diem longissimum sex
mensium: Inde profectus sub
Elorizonrem roris sex men(ibuS
nullus in conspectum venit.
Nleque camen per id temporis
in perpetuis renebris Cedenc, l1
qui ibi incolune; sed quolibet
nenle a Cuodratura prima Luna ulque ad ultimam, dum
Luna
Sphaera Parallela