io OBSERVATIONES 



Ex his duabus aequationibus , deducuntur 

 G:r:i, 3391, et F— o, 3275 valores prorfus diuerfi 

 ab fupra dedudis ex aliis aequationibus , niliilo 

 tamen minus , verae funt hae aequationes, fiquidem 

 cum iis fat accurate congruunt , valores G et F 

 cx aliis aequationibus fupputati ; fed obferuandum 

 cft , inclinationes duas 45°, 15'' et 45°, 00 tam 

 parum inter fe differentes , pro vna eademque 

 haberi poffe, fic vnica tantum obtinetur aequatio, ad 

 duas incognitas G et F determinandas , vnde fit 

 Problema indeterminatum ; reiiciantur tales aequatio- 

 nes , fiquidem facillime ab iis in errorem induci 

 poffumus» 



Experimenta Po?toi inftituta die 18'. Martii 

 1769. ope acus Petropolitanae. 



i^ Polis redis. a^ Polis inuerfis 



_^ = T.33':3o'W -£-3 =-T.5i°: +5'K 



^,=:T.+2: 00 (6) _^^=+T.+i: 30 {bY 



^^=-T.+8: 10 (<:) ,_^rr-T.83: 30 {cY 



.Wb = -T.35: 50 (rf) _£_j=+T.57:oo (rfr 



Sifumant. (tf,r,^,) erit Gz:o,83i3. Ez:o,2o35»Fi:o,o523 (A) 

 w - ' (^,b,c,) - Gzio, 831 3. £-0,1663,^-0,0896 (B) 

 ^ - - (^,^',^,) - G:io,8oi5. E-o, 1962,^=0,0863 (C) 

 Tresaequat.(^,A0^dant.G^-'i.o424.E^=:-o,2443.F^=+o,o662. (A)^ 

 - - - (a,b,dY - G^:z-i,o424.E'z:-o,25o6.F^z:+o,o724. (B^ 



I*. 



