DE PERT. MOT. TrRR. AB ACTION. V£N. 4^7 



V G i =: ^ ct V G ? -- (]) , ac nianifcnum eft forc 

 — ucoC.Q cc y ~ u fiii. d, idcoque tt ti — x x -i-jj, 

 tum vcro erit zi-:i—uu-\-V'V^2UVCo{:.i(p-Q). 



3. Inm ob .iclioncm Solis tcrni vrgctur in 

 diredione ^ G vi zz ^ , ob adionem Veneris au- 

 tcm, tcrra vrgetur in direcftionc ^ ? vi — -*,, prae- 

 terea vcro qniu Solem in quicte (pcdamus , vires 

 quibus ip(e .Sol follicitatur contrnrio modo in ter- 

 ram transferri oportet , a terra autem Sol vrgetur 

 in dirc(flione G i vi = ^ > ex quo eadem Tis ipfi 

 tcrnie in diredione J G applicata eft cenfenda. De- 

 inde quiii Sol a Vencrc vrgetur fccundum G ? vi 

 := -'- , ducl.i r(.(fl:i ^ V ipfi ? G parallela ," tcrra 

 quoque ccnfenda e(l vrgcri in direcflionc ^ V, vi ^ 

 quocirca terra omnino his tribus viribus follicitari 

 eft concipiendu , primo in dircclitMie ^ G adtft vis 

 rr -^-^— . Sccw:da vis agit in dircdione § V eft quc 

 — ;^- Tertla vcro vis agit in dircclione ^?,quae 

 eft ':^ -^. 



auTj 



4. Qiio iam lias vlrcs fccundum dircclioncs 

 coordinatarum noftrarum rcfoUiamus , demittatur ex 

 ? in G V psrpendiculum ? P, ad quod ex ^ rcdae 

 G V p.iralkla agatur J Q , eritque G P =: '^. cof (^ 

 et P ? = V ftn. 4) , vndc colligitur $Q=.v-ccof Cp, 

 ct ? Q— 1; fin. Cp — j', atque hinc pro dircc^lione 

 ab(ci(rje X G rcfnltant iftae vircs 



__ q -4- 5 x_ , l.cof d)-!- -- ^-'^''■°''-^ — ^®.-+-*''^ 4- tl^ 4- liff^l^', 



Hhh a Tum 



