1les. Hac methodo puncta Trajectoriæ inveniuntur expeditiſſime,
niſi mavis Curvam, ut in conſtructione ſecunda, deſeribere Me
chanice.
chanice.
PROPOSITIO XXIII. PROBLEMA XV.
Cas.1. Dentur tangens HB,punctum contactus B,& alia tria
puncta C, D, P.Junge BC,& agendo PSparallelam BH,
& PQparallelam BC,comple parallelogrammum BSPque
50[Figure 50]
Age BDſecantem SPin T,& CDſecantem PQin R.De
nique, agendo quamvis tripſi TRparallelam, de PQ, PS
abſcinde Pr, Ptipſis PR, PTproportionales reſpective; &
actarum Cr, Btconcurſus d(per Lem. xx) incidet ſemper in
Trajectoriam deſcribendam.
puncta C, D, P.Junge BC,& agendo PSparallelam BH,
& PQparallelam BC,comple parallelogrammum BSPque
50[Figure 50]
Age BDſecantem SPin T,& CDſecantem PQin R.De
nique, agendo quamvis tripſi TRparallelam, de PQ, PS
abſcinde Pr, Ptipſis PR, PTproportionales reſpective; &
actarum Cr, Btconcurſus d(per Lem. xx) incidet ſemper in
Trajectoriam deſcribendam.