cct dB-- ""il^f^r* Sine ingente errore quoque ftatni potefl 

 9 P^ zir 3 (3, vnde 'crit s (i -f- fin. p) = i -^ ?w s fin. p% ct ;: zr 

 ' -. . Eft autem tang. G = !^^^ , et tang. (3'' rr ^ , 



ergo rang. P^ = '-^ , et j j =r ^^,.;,„^..,^. , unde rcperitur 



yy — I 



Qui vaior cum priore pro z invento comparatus pracbet : 



fin.^p^ -\- fin. (3 — 2 w fin. (3'(i -^fin. p) -^ ^ fin. (3 rzr o. 

 Hinc iam patet , ainam radicem effe (3'' :zz: o := (3 , ur.de quia 

 tang.p— '^, vel fin. ^^- = ^^,,,,,:,^^;^^ aequatio per 

 iin. p divifa crit : 



fin. (3 [i -I- m* — (w+ — i) fin.' (3] — 2 f^ (i -f- fin. (3) x 



>, ■^[^«^,.^;;;^^!) fin."-|3]-^ 2 K— (?;/*—!) fin."-p] = 0, 



feu evoluta quantitate radicali et neglcdis poteftatibus ipfius 

 fx altioribus , 



fin. p (H- 2 |x) — 2 |x fin.^ (3 — w^ + *^ fin.*- (3 



— m' fin. P H- "^ fin.' (3 -f- m^ — 4-1^ fin-' |3 =: = 



2|j/ fin.^f3 -+- 2/jL (i -H2fji.) fin.-(3-(-;« fx fin.f3 — W/^., vel 

 2 [ji. fin.^ (3 -f- 2 (i -(- 2 |jl) fin.'P -f- m fin. (3 — ;;/^ zz: o, 



cui aequationi proxime fatisfiicit fin. (3 z= o, 5033 , fcu |3 =r 

 30°i3^unde cx tabula rcpcritur (3^= 30° et c = 0,9989217,- 

 quod pracbet B = o, 5754667 . ^ , A z:z o, 574S32 . a , et 



B — A := o, 000634.7 . a. 



Rcpracfcntct Fig. 11. partcm mappae fpeciaJfs , in 

 qua BC Mcridianus ccntri fcu Zcnith C, cuius ParaJlclus Vp 

 fub latitudinc ft ; ct alius cuiusdam pundti A , ciiiiis Paralle- 

 lus Q<7, laritudo fit =(3-1-1". Centrum Parallcli Q </ fit 

 B , £ritquc fccundum lcgcs proicdionis fkrcograpliicac fphae- 



ricae , 



