^'(o):§^ - . 



bica propria per prohl. 4, Applica gnomonem exafte ad li- 

 neam inclinacionis & fimul ad Locum planetae in fua orbi- 

 ca > & defignabic gnomon Locum planecas in Linea redu- 

 dioniSjCunc ad hunc Locum planec^e inLinea redudionis & ad' 

 cerr^e locum applicecur unum Lacus parallelogrammi , alce- J 

 rum aucem ad cencrum planecolabii, qtiod oftendec in Eclipci- 

 ca Locum planec^ ad Eclipcicam redudlum. • 



PROBLEMA SEXTUM, 

 Vetdm Lathudinemflanet^ reperire. 



NOcus fic primo verus LocusTerras & planecsecum ia - 

 propria Orbica tum inRedudionis Linea. Sic cape cir- 

 cino bene acuminaco diftanciamTerr^ a loco pIanec2C ' 

 in linea reduclionis, hanc diftanciam cransfer ex an- 

 gulo inclinacionis in Bafin ( cujus figura in alcero parallelo- 

 grammiLacereexprelIa)adcujus difliancise cerminumpromo- 

 veacurfilum cransverfumparallelogranomi laceri perpendicu- 

 laricer circumiigacum. 2. Cape diftanciam planecse in fua or- 

 bicapofici a lineainclinationis, hanc cransfer ex angulo incli- 

 nacionis in hypochenufam proprio planecae charadere noca- . 

 cam & manen ce alcero circini pede in hypo chenufa fixp,refle£le 

 pedem alterum adbafin & cape difianciam ejus perpendicula- 

 rem abafe, hanc difl:anciam (qucC vocacur finus Lacicudinis) , 

 cransfer in filum transverfiim ex punftoquo bafimperpendi- 

 cularicer incerftcac, &cerminu in filo cransverfonoca, procenfo ^ 

 enim ex cencro incHnacionis filo per cerminum iftum ad ar- 

 cum lacicudinum usque ^ ofl:endec in eo lacicudinem plane- 

 tx geocencricam. 



Haec 6 problemaca flifficianc pronofl:riplanecoIabiifidej 

 horum plurimaquidem aliafiiperfimc, fedcum in his priori- 

 bus canquam bafi fundencur in eorum defcripcione fuperft- 

 dere confulcum magisforeduxi quo usqueipfumec planecola- 

 biumLucem videac & a luce five abAflxonomorum hujus cem- 

 poris luminibus videacur. 



ISIBOR. 



