ASTRONOMICIS. 



453 



§. 7. Nunc igitur quaerantur numcri X' et X", 

 et quia ell 



5S:=:-i, 92157 crit 33 - i ni - 2, +2157 

 vnde calculus ita fe habebit : 



/(«^!) —0,1901924 

 /(33-0 = 0.3830971 

 /]/X'-i— 0,5732895 



/(l^f) =r 0,1901924. 



J^. —0,3010300 



/VX"- 1—9,8891624. 



/(X"- i)-9,778324S 

 hincque X"— 1,60014. 



/(X'-i) =11,11-65790 

 hinc X' iz; 1 5, 01 + 5 5 



quia igitur eft 



/-J.rr 8, 3010300 ; /23* 1= o, 8509677 H 

 et/B23 = 0,1016957 tum vero /^7^=8, 84-6980^ 



hinc calcuUis pro littera Xl ita inlbtuatur 



/^ zz8,3oi03oo 

 /X' =:i, 176 5112 



9>47754i2 

 /S3'=:o, 8509677 



/| =8,3010300 

 Iv =:9,34-'2366 



8,6265735 



ParsI=:o,0 4.2 32 



7,6422666 

 /B^izio, 1016957 



^;r;=S»846980ff 

 / X" =0,204.1851 



9,0511657 

 Pars 111 = 0} 11250 



7,5405709 

 ParsII--o,oo347 



vnde coUigitur numerus n = o, 15135. 



§ 8. Adhibeamus (latim lentcm obicftiuam 

 triplicatam poftremam, vtpotc perfediffimam , cuius 

 diliantia focalis fit =11, ac fupra \idmius fore 



® = 1,02311 n=: it 



JL 1 1 3 ec 



