# Leibniz Legible — https://leibnizlegible.com
# Page: https://leibnizlegible.com/page/820424455:0043
# Permalink to this reading: https://leibnizlegible.com/page/820424455:0043?run=74
# 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 21, page id 820424455:0043
# Original at the GWLB: https://digitale-sammlungen.gwlb.de/resolve?id=820424455&page=43
# Source image: https://digitale-sammlungen.gwlb.de/content/820424455/jpgs/default/00000043.jpg
# Model: FoNDUE-GD_v2_ft_Leibniz, run 74, 2026-09-06T16:05:13Z — 39 lines, status machine
# Lines: 39 recognised, mean confidence 0.94
# Machine transcription. Not an edition. Errors are expected: about 8% character error rate on Latin and French lines, higher on German.
# Licence: CC BY 4.0, Leibniz Legible. Machine output: do not ingest it as verified text; keep this provenance with the text.
# Wording rule: say "the machine reads it as …", never "Leibniz wrote".
# After the first blank line: the recognised lines in reading order, one per line.

Cap. 1.
STRONOM la
Luina majori sui orbis parre lucer, radiis ejus Fruuneur: _
Post Solis intra Horizonrem descensum, donec L8 gradum
declinacionis assequatur in 21 m, nec non post redirum ejus
adg in longistimum crepusculum experiuntur. Poltremo
retractiones in aëre tcam crasso efficiune, ut sol aliquor die-
bus cirius emersat supra, e cardius descendat intra Hori.
ZOntem.
Sequitur Angulus, quem Ecliprica Facit cum Forizonte.
eoque recto vel obliquo. Et cum recto quidem linsule
parres Felipricae angulum constirmune aqualem angulo, quem
eadem illx parres ad Meridianum faciune derolurx. Cum
urroris aurem Horizonce quem Facir Feliprica angulum me-
utur arcus a nonagelimo tclipricae gradu ad Horizontem
incurracus; Dolusque ictius arcus est hic ipse, quem rocant,
Orientis (Tubandi puncti Ecliprica) angulus.
Onem vero angulum Meridianus ad polum etticit cum
circulo aliquo declinacionis, mmensurat arcus Equacoris nu-
merandus a Meridiano ad circulum usque declinacionis per
dacum lidus incedentem, rocaturque alias ille angulus (ive
arcus, distantia Cideris a Meridiano. Anguli denique, quem
idem Mecidianus ad Z enich efticir cum circulo aliquo ver-
ticali, mensura est Azimuch scu plaga Cideris, In HIOTIZONTC
numeranda à cardine Meridiei vel Seprentrionis ad punctum.
quo verricalis per darum lidus occurrir Florizonti. In globo
cerrestri, ubi datum locum applicueris verrici, e ab eo pet
alium quemris locum demiseris verricalem; limilis prorsus
anculus efficitur, quem posirionis appellanE.
In lingulis denique circulis numerati arois sorriuneur ap
Pellationes lua5. In equatore caelesti suDPuTamUS Ascen-
sionem rectam ab inicio Arieris ad punctum, quo circutus
declinarionis per datum lidus occurrit Aequatori. Postea in
hoc circulo declinationis, vel ejus vicem gerente Meridiano.
numeratur inde ab Fquatore declinatio lideris versus polum
arcticum borea, versus antarcticum australis. Sed Ascensia
Descensiove obligua est numeracum ab Ariere punetum F qua-
Eoris Horizoncem tangens obliguum, simul aeque ducum
Sid