Flg. i. 



438 MEniODVS 0BSERJ'AXD1 



§. 7. Ex obllrtMtionibus cclipfcos Solaris hoc modo 

 inflitiitis pofliint dcdiici (cqiicnti;i. i™' Motiis Liin:ie a So 

 lc vilus ciim dircctionc ciibdcm ad diiirnum Solis tempo- 

 ri intcr div.is quascunquc obfcnuuioncs intcrccdtnti rclpon- 

 dcns. Ex qualibct namquc oblcruationc phalcos dantut 

 fcmidiamctri Lunac ct Soiis , quantitasque phalcos parti- 

 bus acqualibus tcmporis cxprcfTac , nec non inclin;itio chor- 

 dae dctcdiiiae ad diurnum ^olis \ \ndc dilbniia ctinm cen- 

 trorum Liinac ct Solis , ct indinatio ciu><.l(.m ad diurnum 

 Solis tcmporc obfcruationis phafcos obtincntcs fkilc inue- 

 «icntur : li pro prima c lumma fcmidi.imctrorum vtrius- 

 que mobilis qnantitas ecliplcos fubtraivatur , pro rccunda 

 autcm inclinationis diordac dcfcdliuac ad diurnum Solis 

 complcmcntum ad angutum rcctum liimatur. His autcm 

 ad tcmpora duariim quarumlibet oblcruationum d.itis , po(T- 

 toquc Solc tcmporc intcr obidtifltioncs intcrccdcntc in lo' 

 co prioris oblijruationis immobili , ficili ncgotif) inucnitur 

 propotitum. Rcprclcntct cnim linca A l^ diurnum Sohs , 

 circulus G Pj? F Solcm , (irquc in vna oi^lcruationc EP 

 chorda dcfcftiua , cum indinationc ciusdcm ad diurnum 

 Solis E P K , n / radius Lunac , K radius Solis , l 

 quantitas ccliplcos , ct crit H K dillantia ccntrorum cum 

 inclinationc ciusdcm H K P ad diurnum Solis A B. Iii 

 fccunda obfcruationc chordam dcfcdiuam rcprclcMitct linc.i 

 GT, cum inelinationc ciuMicm ad diurnrm Solis GrK, 

 fitquc radius Lunae I n , niagnituilo ccliplcos w , ct crit 

 dillantia ccntronim 1 \\ , ci m incHnfltionc tiuHiem ad 

 duiriuim Solis 1 K P. PxccHiis huius inclinntionis (iipra 

 priortm incliivuiontm , icw diffcrcnria tarnndtm , crit an- 

 guius 1 K. IL Pcr cxtrtma dill.intiarum K H ct K I , lcu 



punda 



