et S ad rc<flam TA demittaiuiir perpendicula LX et S P, 

 et pro pundo L vocatis coordinatis TXm.v et XL~ j', 

 erit X — v cof. (J) ct j» — v fmg. (J), pro Solc aiitem erit 

 TV - cof. ct S P - fin. 0. 



§. <). Nunc vt principia motus huc appliccmus , 

 primo ipfe angukis A T S — nobis exprimat mcnfiirani 

 tcmporis, ita vt clcmcntum tcmporis fit d^; dcindc ipiam 

 Solis maflam pariter vnitate dcfigncmus, cuius rclpc(flu fit 

 mafla tcrrae — w, cuius valor cx vcra parallaxi Sulis dc- 

 duciuir in — -,te*<^, , Lunac autem mairim, vt iam notauimus, 

 rullam flatuamus. His pofitis J.una primo loJlicitabitur ad 

 terram vi zz — , in dircclionc L T; lccuudo autcm ad So- 

 lcm trahitur vi — '- , in dircdione L S. Tcrtio vcro, quia 

 tcrram in quictc fpc^flamus, vires, quibus tcrra fi:)llicitatur, 

 contraric Lunac applicari oportct , vnde cum Sol tcrram 

 attrahat vi - i, in dirc(fiionc T S, cadcm vis — i Lunae 

 applicata cft intclligcnda fccundum dircdioncm S T. 



§. 7. Nunc fingulas has "vircs fccnndum binas dl- 

 rc(flioncs coordinatarum .v ct j rcfiDlui oportct, vndc pri- 

 ma vis — — fccundum L T pcr rcfijlutioncm dabit pro 

 dirc(flione XT vim — ^^f = '^^ ct pro dircclionc LX 

 \im — ^ — '"-^"'•?'. Sccundo vis fi:cundum L S, quac efl 

 ~, dabi^t pro diTcdionc TX vim - ^i^^JL — «'^-*^^:f^ 

 ct pro dircaione XL vim --(ili-r^L —-^' '■•*-•"/'''• '^. De- 

 niquc tcrtia vis = i, in dircclione ST agciis, pracbct pro 

 dirct^^tionc X T vim — cofi ct pro dirc(flionc L X vim 

 — fin. 0; vndc colligcndo tota vis iu diicdiouc XT vr- 

 gens crit 



m 



