facta cuolutionc ct ncglc(flis tcrminis minimis, prorfus vt 

 antc prodibit a' — ^_^^ . Hi autem valorcs proximc tan- 

 tum funt veri, ct aliquod difcrimen prodirct, fi approxi- 

 mationem vltcrius profcqui vcllemus , quod auicm opcrac 

 prctium non videtur, cum fulikiat iftum valorcm ipfius a 

 proximc nofle. 



Euolutio cafiis, 



qiio Luna motu Miiformi in circulo cii"ca tcrmm 



rcuokii pofflr. 



f. 14. lam oftcndimus, lioc ficri non pofTc, nifi 

 anguhis S T L — 7/ zn CP — ^ fucrit vcl nulhis vcl iSo 

 graduum. Priorc igitiir cafu I.una pcrpctuo Soli mancret 

 coniunda, feu in pcrpetua coniundionc cnm Solc ccrncrc- 

 tur*, poflcriori vcro cafu pcrpctuo in oppofitionc Solis vcr- 

 farctur, ideoque pleno lumine luccrcr. Vtroque crgo cafu 

 talis Luna rcuolutioncs fuas fingulis annis abfolucrct , ct 

 tcmpus mcnftruum cxaclc cum duratione anni conucnirct. 



§. 15. Dcinde ctiam vidimus, difiantiam talis Lu* 



nae a tcrra cffc flzr V7« Cum igitur fit »;=,,',,, crit 

 c =: 1,'^, fiuc hacc difiantia acquabitur ccntcfimac parti di- 

 flantiac Solis a Tcrra. Quarc cuni dillanria mcdia vcrac 

 Lunac a Tcrra fit quafi J.. diHantiac Solis , ralis J.una 

 quadruplo longius a terra diftartt quam vcra Luna, idco- 

 quc in fcmidiamctris terrac cius didantia forct circitcr 

 240 fcmidiamctrorum tcrreftrium. Vndc patct, quantopcrc 

 tcmpus pcriodicum talis J-unac a rcguia Krplcri cdct di- 

 fcrcpatuxum, quoniam fccundum hanc rcgulam tcmpus pc- 



rio- 



