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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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ASTRONOMIA.
sellari ubi sunt lucida capica Geminorum; atque ubi de-
Einic numeratio; ibi est polus aequaroris arcticus, cui e
diametro oxponitur ancareticus. Tam vero. ut morus annuus
celluris circa Solem produxir eclipricam; ita diuenuS FCrEZ
morus circa axem suum A quarorem producir. F. Aque Xqua-
cor proprie circulus cerrectris, quem punctum aliquod in
luperticie cerrx x qualirer a polis urrinque remorum describie
moru diurno. Sed si quis ipsum aequarorem in caelocon-
cipere relit; tum certe puncta, linex ex superticies non
Machemarica concipiendae; quae omni protunditare Careant,
led mulro crassius philosophandum. F.renim roca illa Iptiaera,
cujus semisiimeter non minor est distancis Telluris à Sole.
non nisi piincti ec centri rarionem habet. FTujus cam crasti
buncti Auxu e cenrro ad celipricam, generatur radius ec-
dipricae; quo circumacto describitur area ccliprice protun-
diraris Cac magnae, sed qua respectu frmamenci sic insen (I
bilis. Sic quoque, si crassum illud punctum ecenrro cAuaE
Derpendicularirer ipsi. plano ccliprica, generatur axis ec.
lipriex. Ira numeracis in coluro Sollticiorum a polo cclipri-
ex versus capira Ceminorum gradibus 23. 30, rurtus ex
cenrro illo crasso enicer ad tinem istorum 33. 30. aXis
requaroris aque crassus, qui tamen respectu valti tirmamenti
Aon. nis linea CII. Acque ica demum e requator de tropici
concipientur crassis circumterenciis in Sphaera Eixarum deli-
neari. Hlis ira poliris; ubicunque jam degar rellus in orbica
lua, semper eric in. centro tirmamenti, siquidem illud cen-
crum ram grande est, acque ipsa orbita relluris. Ec nihilo.
tunus, Si dividatur aliquis circulus in ejus (celluris) super-
ticie descriprus, v. Br. xquator in 3600: PONunE ex CentrO
celluris per Cingulas dirisiones in iplius superticie Factas ad
plum aequarorem caelestem cduci linex rectae, qux divi-
denr pariier corum aequarorem coelectem in toridem gradus,
adeoque singulis gradibus xequaroris cerrestris respondebunE
Tinouli
oradus aequatoris caelestis, SICHE TOTUS RGUATOP Ter
feltris subjacet rori aequarori ccelecti, in quacunque randem
PaF
00b0 2