-i-ps 



ADDITAMENTVM. 



§. 4. Hinc igitiir, quia lens cryftallina afllimU 

 tur vtrinque atque concaua : erit pro ea 



deinde, quia eti.im tertia lcns eft vtrinque aeque coa- 

 'VCXli: pro ca erit 



vnie numeri X' et X" ob 



fequenti modo determinantur 



j l(^'~<) = 0,2245357 

 fubtr. O =r 0,8450980 



ad /(°^?^) =:o, 1901924(4-) 

 add. /((£-i)rr 8, 8-^695^7 (-) 



lVK"-i:=: 9,o£7i49i(-) 

 hinc /(X"- i^cz 8,05429b2(+) 

 idcoque X" — i, 0113 



/VX'-i=: 9)3797377 

 hinc/(X' On: 8, 759+754- 

 ideo^ue X' =: i,o575 I 



quibus inuentis calcuhis pro confufione ita inftituatur, 

 Pio parte prima Ij ?ro fccunda parte 



/M 

 / X' 



— 9,9036003 

 ■zz 0,0242804 



9,927*5807 

 /S5' z=9>4-^43^35 



log. p. I = 0,5035372 



i M :^ 9t 9036003 

 / y' =9, 4258601 



9, 3294604 

 /B^ zr 0,0633870 



p. II. •=. 9, 2O60734 



ideoque pars I--3, i88i||idcoqae pars 11 =- 0,1845 



Pro 



