424 OpusculAi» 
ditat , nancifcor ^ — = five 
d ^ds 
gy ds — ~- . mu du = mu^ dq, atqui = " f > ^^S*^ 
gyds^mu^dq-\-mqudUi & fafta multiplicatione per 
gqyds:=zmu^qdq~\-mq^uduy & integrando 1% gqyds 
mu"- q^ — mV^ Q^. Summatoria ita accepta elt , ut evanefcat 
in pundo projeclionis . Ultima aequatio prsbet 
. Hmc 
q\/ m 
dt — ^— - — — ^ ; atqui qds—ydsi:=^-^^—^', 
jgitur — — r-^— 7= -— — & 
y d (p \/ m 
/ = - — p ^ ^ygg forraula exquifite cum ea 
r 
cohaeret , quam tu , Vir dodlilTime , in fecundi problematis 
principio per methodum artificiorum pleniflimam deduxifti . 
Ut ad curvas aequationem perveniam , in meam sequatio- 
nem fecundam introduco valorem veiocitatis, ut oriatur 
fydxdy^ gydy^- _ m f^^zSg^yds , 
dqds ^ ' / ^ y 
ergo ~ ^ -Mydy' ^ zSgqyds ^ ^^^^ 
^ dq dqds ^ 
muitiplicatione per j provenit — fdy^- f — - = 
fffdy' zdqSggyds , . d <p 
qa s ^ i f 
6rietur sequatio — fdy-\- ~ — ? = -^yj^ i » 
& translatis opportune terminis 
m V 
