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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 69, page id 820424455:0091
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Sect. 2.
A5TRONOMIL.
Solis Vosm, ut rester Verus ejus otuS r eo V. Acinpo
Seriori semicirculo P O A, (qui _ ascendens dicitur) arcus
Eclipricx m2 seu prosthaphxresis addirur ad medium morum
Solis Ym, uE eradat verus Y m v. Ad investigandam au
rem prostaphaere(in mT~ vel TO C, requiricur angulus
ACO, (cui aequalis est A TM) dictus Anomalia media
Solis, e argumentum; quemadmodum A TO vocatur A.
nomalia vera, Jeu conquata. Postremo si linex Aplidum
AP ex P excicetur perpendicularis R TS, dicirur haec linea
mediarum longieudinum, quandoquidem Sol, movens in EC-
CentrICO AR PS, sicur in A remorissimus est a Terra, e
in T proximus; ita in longicudinibus mediis R e Smedio-
erem habet a Tellure distanciam.
6. Nec dissimulandum, lineam apsidum A P habere qui-
dem punstum TExum; sed iplam una cum coto Fccenerico
aularim cransterri in consequentia, ita uc ansulus YT A
luccessu remporis augeatur magis ac magis. Hodic quidem
Punctum A verlacur sub 60 e7, sequenri seculo eric (ub7, ac.
que ita deincers.
7. Ouin e hoc, si libet, obserres, eccentricirarem C Y
quibusdam rilam tuisse mutabilem, quippe quae hodie sIC ParS
Racii Eccentrici C A vigelima octara proxime, olim vero
major fuerit, minorre. Alii opinionem iltam ex incerri-
cudine obserrationum anciquarum naram ese auTUIANE, ne-
Que de muraca eccentricirare caruendum, priusquam cerrio-
ribus indiciis contirmetur, quod non nisi plurium scculorum
dilivencioribus obserrationibus praectari poltic.
S. Ac licer murario Obliguitaris Fclipricae eidem obserra-
tionum incerricudini accepra lerenda rideatur; porest ramen,
si requiras, Talvari concepto motu quodam libracorio polo-
rum Ecliprica, quo hi sub Coluro Sol tiriorum ad polos F
quaroris lenre admodum annuant e abnuane, unde oporteret
Felipricam iptam nunc ab sE quatore divelli, nunc rurus ad
cum connivere.