Opuscula 4 
VI L 
Z)e ^i^i^atione mediaz pro^ceffionis (squinoBlorum . 
Slnt N, « C -^^^- ^4') pun(^a , in quibus sequator Ter- 
ra: A N B fecat Eclipticara C N « : M , w punfta , in qui- 
bus xquator fecat lunarem orbitam DMw:0, o interfedio" 
nes lunaris orbitie, & aequatoris , & denotet N puncium aequi- 
noc'l:ii verni, M nodum afcendentem Lunae . Si D , Kg fmt 
perpendicuJares ex D , & A ductae in lineam Oo, & per M 
ducatur arcus ciiculi maximi M P plano aequatoris perpendi- 
cuiaris , & vis pertufbatrix Solis ad vira perturbatricem Lunae 
fe habeat ut i : Q_, erit angularis motus nodorum ^quatoris 
, . 3 Q . cof. A O D . D . ? « . ^ p 
cum plano lunaris orbitse , or 
arcus ipfe , quo nodus O regredietur , erit ~ 
. ^ ^ . Ent vero arcus ipie ad arcum , 
t .K^ 
quem punftum O circa aequatoris radium AT, regrediente 
Bodo, delcribet , ut finus tctus ad finum anguJi POM, five 
AOD. Rurlus fmiiles arcus, quos punfta sequatoris O, &N 
circa eumdem ladium AT delcribent , proporticnaies erunt 
linubus anguJorum OTA, N TA , five perpendicularibus 
A^, AG. Denique arcus ita defcriptus a pun(?io N erit ad 
arcum , quo nodus N regredietur in plano EcJipticae CN;z, 
ut TT : I . Quare compofitis rationibus erit arcus , quo nodus 
jequatoris K ob Lunae vim regredietur in plano EcJiptitae 
3 Q_ . fin. A O D . cof. A O D . D // . A G . 0 . ^ 
; : quam quantitatem 
? . A ^ . A* 
per radium A dividtndo , & pro D fubflituendo vaJorem 
inedium | A^, fiet motus medius anguJaris nodorum eclipti- 
cae , & aequatoris vi Lunse genitus = 
3 Q_. fin. A Q D . cof. A O . KQ . <^ a . d ^ 
2irt . h.g . K 
Fft vero juxta eJementa Trigonometri^ A G — fm. A N 
= fm. A O . cof N O Ijl cof. A O . fm. N O , & pofteriore ter- 
mmo orailFo, qui per integrum femicircuJum ambiguitate f gni 
deltruitur, tft A G =. fm. A O . cof. N O =^ A ^ . cof N O . 
T.V.P.IL F Kur- 
