■ ' 437 = 



fin E fin T zz: fin E fin I -h e cof E fin I — i fin E cof T, h. e. 

 i zz: e cot E tang I zz: tj fin I cot E zz: p cot E. 



Pofito igitur E zz: 23° 2,9^ 3 fequentes binas aequationes nan^ 

 cifcimur : 



I. incrementum ohliquitatis ecliptiCae zzr e zzz 



— 582 3 7/ fin (t. 5o /x |) — 1^.4." cof (t. 5of) 



— 61 1/* fin (t. 2 4 f, 7577) - 432 7/ cof (t. a^^JV) 

 -f- 663 i 7/ fin (t. 29", -495 3) — i444 x/ cof (t. 29^4953) 

 -4- 20o 7/ fm (t. 32^ 8i8i) -t- 225" cof(t. 32^ si8i) 

 -4- 1174" fin (t. 4 2 /7 , 6532) - 776" cof (t. 42^6532) 

 — i57* // fe(£45 /y * i9^)-+-5S4 r i // co[(t^5 // 9 -i934.)- 9 



II. proceffus punffiorum aequino&ialum iuxta longitudi* 

 nem — i — — 3*53' / fin (t. 5 c f0 -f- 13 404" cof'(t. 5cf) 



— 995" fin (t. 24^ 7577) 4- 1407" cof (t. 24", 7577) 



— 3 3 24 /7 fin(t. 29^ 4953) — i^^^cof^t. 29^4953) 

 -f- 5 1 8" fin (t. 3 2 /7 ,8 1 8 1) — 460" cof (t. 3 2 7/ 5 8 1 8 1) 



- i787 7/ fin (t. 42", £53 2) — 2703" cof (t. 42", 6-532) 

 8841^-fin (t. 45 x/ , 1934)+ 3615" cof (t. 45^ 1934). 



§. 5» Ex his aequationibus, cafu tz:o reperitur e~o et i~o, 

 quemadmodum oportet: cafu t~ ■+■ ioo^ ezz: — 61^,6 - y i — -h 

 Z3";*; cafu t~— ico, e = -+-6i // ,4; i-—2§ // ,$; cafu tz:— isoo 5 

 s=-+-978 // , ^ ; i- — i325 // ,<$. Vnde fequitur, vi aftionis plane- 

 tarum in tellurem, obliquita'em eclipticae decreviffe tam fe- 

 culo decimo feptimo quam decimo o&avo 61 | v , ab Hippar* 

 chi autem aetate vsque adi^oo \6 y 18^4; ideoque Hippar~ 



I i i 3 chi 



