CORPORVM RTGIDORVM. 205 



«a 'pnlchcrrima incrementi pcr toijm mcchanicam 

 mcrito expcddre poirunuis. 



§. 2r?. Intcrim tameii formulis , qu.is pro ilKs 

 litteris maiiifculis fnpra inncnimus, cilii^cntius cuo!u;i- 

 mus, quo indc forfitnn facihus per(pici queat, qnemad- 

 ir^odum aequatio iila 5. 2:. data adimpleatur. Introdi:- 

 (ftisautem fex anguhs ^, 4'; ^^^ ; y], •,)', V P^f ci"os illas 

 §. 14.. cxpieflimus , ti-nios priorcs per pollcriorcs 

 ita dcterminauimus , vt pofito 



— cof ('y;--*i').cof (v)'--V)'''j.cof:('yi'' — >!)— AA e/Tct 

 tang.<^"--^^ — : tang.<^--77^^ ;,^; tang.<^'r:— =^^ — 



vnde ergo tam finus quam cofinus illorum angulo- 

 rum dcduci oportct. 



§. 30 Quod quo ficilius iicri poflit , loco an- 

 gnlorum --i , v/ et yi^^ introducamus alios angulos 

 l,e',0'', ita vt fit yi--^'—^^'; V - V' zr ct 

 V' — "^—^' , vndc patct fore -+- $' H- d" — o , 

 ita vt hi trcs noui anguh tantum duobus aequiua- 

 leant; ideoque hinc cx angulis v\ , y\^ et V' vnna 

 mancbit indefinitus, qui fi fiicnt >] crit V — >l — ^'^ 

 ct y\^* — y\-\~ ^*. \\s igitnr anguhs introdiidis 

 erit A A — — cof. ^ col. 0' col. O''', hoc^uc valore ad- 

 hibito habcbimus 



tang.^'' = -y-^-?^«l, 



tans. / -_ V_«/.«'cor.r 



tang.^^^-V---'"^^. 



O ^ co'. 6' 



^. 3 1. Ex his formul s pro tangrntibus in-' 

 Tcntib culhgamus formula: pro fimbiib ct cufiiiibus, 



C c 3 ac 



