Apian, Peter, 1495-1552, Ptolemy, active 2nd century, Gherardo, da Cremona, 1113 or 1114-1187, Geber, active 13th century. De astronomia libri IX, Duhem, Pierre Maurice Marie, 1861-1916. fmo RIBRL · Norimbergae : Apud Io. Petreium · leaf 169
eius & ipfius medio 8C fine eius , oportet propter illud, ot fit motus Iunx uifibilis ab initio eclipfis ad eius medium inxqualis motui eius ui* iibili a medio eius ad ipfius finem,&!,ppterea q ifti duo arcus fimt xquales,& motus Iunx in eis eft diuerfus,oportet ut fit tempus qd eft ab eius initio…
Mathematics · Astronomy · Astronomy, Arab · Astronomical instruments · Spherical astronomy · Scientific apparatus and instruments · Imprint 1534
Internet Archive · John Carter Brown Library · Public domain (published before 1931). Free to use for anything.
![An illustration from Directorivm generale vranometricvm : in quo trigonometriae logarithmicae fvndamenta, ac regulae demonstrantur, astronomicaeq[ue] supputationes ad solam ferè vulgarem additionem reducuntur : opus vtilissimum astronomis, geometris, arithmeticis, perspectiuis, architectis, praecipuè militaribus, mechanicis, geographis, nec non ipsis philosophis naturalibus (1632)](https://img.insideoutlibrary.com/img/200/ia-directorivmgener00cava-156-0.webp)
