io BOUDEWJNI DONKER CURTIUS \v. B. FILIT, 



Li Triangulis ZP et /3ZP. "anguli *ZP ct /3ZP ., qui arcubus EFR et DEFR men- 

 surantur, haec azimutha denotant. Ut autcm innotcscant, attendendum tantimimodo est , 

 quod in illis triangulis tria latera suit cognita; hinc in singulis triangulis hae formantur 

 aequationes. . 



Cos. PZ r= Cu ' P * ~ C S - PZ C S - Zx 



\_,L/." A. -^M _, T\ T O* rr 



Stn. PZ . Suit Z 



et 



. 



Sin. PZ . Stn. Z/3 



Quae simili mode, ac illae, quae occurrunt pag. 7 sq. transformantur in 



^ 



Cos. \-i . Cos. 11 



Si supponamus S' = 1(PZ +'Z* + P) = 135 f (D' + L -f H') 



et S = ICPZ + Z/3 + P/3) = 135 i(L + H D > 



... .-. 



(11 -!-$).'. ~ i} 



D' == 7 21' 57". a 

 L SB 52 -9^ 30". 6 

 ^= 34 47' 16". 5 



Wnc L -f- D' + H' = 94 18' 43". 7. 

 . |(L + D' + H') =: 47? 9' ai". 8 



quod deductum a - 135 o' oo".o. 



exhibet S' =: 87 50' 38 ". 2. 

 Sed COOT//. L = 37 50' 30". 



Igitur S' - PZ = 50 o' -8". a 







et Cow//. H' = 55 i a' 4 3". 5. 

 Jgitur S' - Z* = 32 37' 54". 7- 



J!toPZ. 



tjin, , L ^x T ^ ,j, 



Co;. L . Co*. H 



j '. 



. 



Log. 



