8 BOUDEWINI DONKER CURTIUS w. B. FILII, 



Et si ponamus S = KPZ + P/3 + Z/3) = K9 Q L + 90 + D + 90 H) 

 =5 I35- I (L + H -D), erit 



,. P0 .,. Z0~ 

 Sin ' C s "" Zj3) . &. (S P/3 ) 



Sin 

 Oft, 



Cw. D . Co*. H 

 Nunc calculo Logarithmico , anguli P/3Z valor realis definiendus est. 



Latitude loci = 51 9' 30" = L ( 10 ) 

 Sed altitude stellae /3 = 24 27' 49" = H 



L + H = 76 87' 19" 

 Est autem D = 8 24' 43". 2 



hinc L + H D = 68 12' 35". 8 

 etS(L + H-D)= 34 6' 17". 9 



si illud deducatur a 135 d oo". o 



habemus S = 100 53' 42'.! 

 sed deducendum est Z/3 := 65 2' 1 1 ' 



Ergo S Z/3 = 35 21' 31". i. 



Sic quoquc substrahi debet P/3 = 98 24' 43". a a valore ipsius S 

 hinc S P/3 = 2 28 58' . 9. 



Sta **PB7 - Si "' (S ~ Z ^" Sin - CS - Pg) 

 W< zF/3Z Cw. D . CoJTH. 



Log. Sin. (S Z/3) = 9,7624479 :; 



Ztg. J/. (S P/3) = 8,6367230 



Comfl. Log. Cos. D = 0,0046976 



Compl. Log. Cos. H = 0,0408515. 



Igitur, 2 . Zo^. Aw. |P/3Z = 8,4447200 

 seu Zg. Sin. |P/SZ = 9,2223600 



hinc iP/3Z = 9 36' 19". 7. 

 Ergo P/3Z = 19 12' 39". 4 

 sed ^ 0P = 31 49' 29"- 



Erit igitur ^ /3Z = 51 2' 8". 4. 



In 

 (10) Cf. Francoeur* op. laud. pag. 505. 



