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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 37, page id 820424455:0059
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Cap. 30
LASTRONANTA.
noctialis dato cemporis momenta culminanrem, idec que
Tub Meridiano collocandum. Tumi Termici: culi Politions
exrremirares cordinibus Meridici de Sepcentrionis affiee.
Mox a gradu Equaroris culminance compuca in ipso. L qui-
noctiali vertus orienrem gradus 30, ec per iptum 30 gr2.
dum craduc semicirculum posirionis, e obserra gradum,
quo is secat cclipricam, is enim est cuspis domus undecima,
quam adnorabis in charta. Rursus admore semicirculum
policionis gradui Equinoctialis, inde a culminance gradu,
lexagelimo, ee noca gradum, qua secatur celiprica, ita ac-
quires culpidem domis duodocima, nocandum similicer in
charca. Deinde transser semicirculum policionis ad plagam
occidentalem, ex a pridu Eguaroris culminance compur a
vertus occidencem gradus 30, _ per punctum Aguacoris,
ubi. delinit numeratio, crajice semicirculum policioris, qui
quo loco secar cclipricam, ostendie cuspidem domus nonae.
Denique per gradum Lquaroris inde a Meridiano 60 cri-
jectus semicirculus polirionis octendic in ecliprica cuspidem
domis octavae. Ipse vero Meridianus secac celipricam in
cuspide decimx, ac Horizon ortirus quo loco secur cclipri-
eam, exhibet cuspidem primae, quX ascendens YOCATUE, d
Fsero(copus; Occiduus vero Horizon prodic in eadem ecliprica
cuspidem septimae, gux quemadmodum e diaMeero oppo-
nicur primx, ita e octara opponieur secnnaa, eE nONE
terria, e undecimae quinta, ee duodecitma sextas
ProbI. 18. Frecti thematis punctum quodvis aa punCtum
quodvis dirigere. Si Plarecx _ aspeciui cuiris lOCuM suMM
altiones in Zodiaco secundum lonsirudinem d laciemdinem,
e elisas Planeram quemvis vel gradum celipricae, quem
dirigere relis; vocabis hunc, docendi gracia, locum primum;
e locum ad quem ictum primum sirigere est animuS, Vo-
cabis secundum. Tum per locum primum, (qui e Sieni-
ficator dici Polec) crajiciro semicirculum poticionis, e quo
loco is secar Equinoctialem, cum gradum diligenter notico.
Rerento aucem semicirculo polirionis in ilto licu, volve olo-
bum versus occidencem, Aonec lacus secundus appeltuc 3d
sLrI