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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 36, page id 820424455:0058
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ASTRONOMTA.
ram datum, firmatoque in isto sicu elobo; adduc quadran-
tem ad locum Solis, vel sella; _ in margine quadrantis
habebis alcicudinem guxlitam, ad pedem vero quadraneis in
Horizonce apparebic Arimuchum solis, vel Rellae, nume.
randum ab incersectione Meridiani _ Horizonris (australI
vel sepienerionali) ad ipsum ulque quadrancis pedeni. Sin
aliindo decur, una manu volves globum, altera circum
duces quadrancem, donec locus Solis vel Aellae occurrat
saro gradui alticudinis in guadrane: tum index opendet
horam, ee pes quadrancis Aximuctium. Daco vero A2i.
mutho, adjunse pedem quadrantis ipsi Aximutto dato, et
volve slobum, donec locus Solis vel Rellx appellat ad mar-
einem quadrantis gradibus distinctum; ostendet Sol ipse
vel Rella alcicudinem suam in quadranre; ex index horam.
Probl. 16. Datorum in elobo eerrestri duorum locorum di-
stanciam, e angulum positionis invenire. Vocemus do-
cenli graria, unum datorum locorum primum, e alcerum
secundum. Exploraca per Probl. 2. loci primi lacicudine,
compone slobum cerrestrem ad eam lacicudinem, e ipsum
locum primum adrolve Mcridiano, Ermaroque globo in isto
licu; e apcaco quadrance alciiudinis ipso verrici (ubi runc
eric lucus primus) adjunse quadrantem loco sccundo. Ouo
fucto numerabis gradtus distantia à vertice ad locum ulque
secundum, ac anculum positionis in Florizonce inter Meridia-
num ec pedem quadrancis.
PrObI. 17. Dato tempore es loco; Thema caeli ericere.
Compoliro globo caelecti (vel hhic absic, cerrestri) ad dati
loci lacicudinem, investigarum locum Solis dato rempori
congruencem adjunge Meridiano, e indicem horx duodeci-
mx; cum volve globum, donec index ostendat horam da-
tam: vel Si accuraciis operari libeat, invenex per Probl. 5.
Ascensioni Rectae Solis adjice gradus, quor comperunehoris
ec minuris a meridie claplis, compucando pro qualiber hora
gradus r5, _ pro quacernis minuris horariis gradis lin-
euios; abjectis, li lic opus, gradibus 3605 ita conAabis
Ascentionem Rectam Medii Coeli, sive gradum Lqui
noctialIS