^Q^ OBSERJATIO ECUPSIS 



5. Si dicantiir paralhxis horizontalis liimic — P , St> 

 lis izip (zz lo'''') , lcmidiamctcr Soliszr i(— 15^ 51''^. 

 ex Tabiilis) i crit lcmidiameter horixontalis vmbnic — P 

 _l_p — j_^ g«j P. (adiicitiir ,'5 P ob aiigmentiim vmbrac ex 

 atmiifphaera Tclluris). Igitiir pro calii praclenti tiec fe- 

 midiameter vmbrac horizontalis — 60'. 59'^ -{- 10^^ — 

 I 5^ 51^^ -f- 42''^ zr 4<S'' o^^ ; in altitudinc autem 23. 

 graduum —46^ 19''^. quac fcilicct in eadem rationc au- 

 gccur , qua crclcit diamecer altitudinls lunac, Vocabo hanc 



Jcmldiamctrwn i^mbrae in altitiuiiue.. 



6. Ope huius , f;i(flis ob progicflTum vmbrae in difco 

 Lunac debitis corredtionibus^ nonnullas eclipfis phales con- 

 ftrucre , earumquc ct ccntri vmbnic pofitioncs rcfpcdii 

 Cum diuriii vi(i , tiiin circuli btitudini^ Lunac dcfinirc li- 

 cuit. Cum autcm plcriquc appulfus coniu (equcntis pha- 

 fij nimis vicini clfcnt appulfibib limbi Lunac lcqucntis ad 

 filum horarium , quac conditio cxaclam pofitionis ccncri 

 vmbrac detcrminationcm rcfpucbac ; in maiorcm ccrtitudi- 

 ncm non incongrunm efic duxi , cx calculo Cei Euleri , 

 cum quo clcmcnta ex oblcruationc cmta piopc confpira- 

 banc : in liibfidium anumcrc hcMMrium Lunac a Sole zr 

 35^. 27^', ct inclinitioncm orbitac Lunac ad cclipticam 

 — 5^-3V; quo f;i<flo cx oblcruatis appulfibus altcrutri- 

 us cornu phaCis conllruiftum (dicma (c(]ucntcs (iippcdica- 

 ^ic dcterminationcs. 



Ordo 



