">|3^ ) 12» ( |g*« 



Porroob .^=:;S erit 



(^(p4-^^) (<i; cof. ^-t- /^9 fin. (^ -e)) = o, 



quorum fidorum finitus: i; cof. ^ +/^ fm. (^ — &}, euancs- 

 cere neqtiit ob 



-y fin.^-/^cof (^-0) z=o, 



fequcretur cnim inde i; cof ^ iz: o et/^cof — o, quod 

 ron nifi cafu — 90" locum habet. Reiiuquitur crgo vc 

 fit d (p + d!^ — Oy ideoque (p-\-^ conflans. Hoc impctiato 

 reliqua non difficulter expedicntur. Ad intcgrationes au- 

 tem determinandas pro rtatu initiali t—o, ponamus fuiflTe 

 celeritatem progrefliuam v—e, (p = o, PZO = 0=:^; 

 2.0 — s — \ et celeritatem angularem » — e in lenlum 



ACBi hinc erit p r::/?' — e cof. f ct y — efin.fi porro 



tang i, — ^_,jjin.ijm:^ • 



Statuatur 



f/Jfn.fcor.b — 



;-^= tang. ^, 



e — tjjm.ijia \) 



Tt fuerit inifio H ~ <^, ac perpetuo crit ^ + (p-^y ita vt 

 angulus D Z Q — ^ maneat conftans. Quare cum fit 

 ^zz^- (p erit 



'vfin.{^-(p) =fqcoC.{c;~$-(l>). 

 Supra autem inuenimus: 



^,^ =: cof (^ + (^) -5 cof ^ ci 



^-^^J^^=z^fin.(?-i-(P)=df:n.^, 

 Vnde integrando coliigimus: 



vcoi.(p zize-^zdgt cof.^ ct 'yfin. (5zr 2 J^f (in.i^, 



hinc- 



