fioc est, si utrimq^ue per v dividamus, turn vero pro — valo- 



V 



rem substltuamus-r, pro z autem valbrem vs ti — ■ « J, fiet 



, Ct. ) Tang 9'' 



:^'. '■ 'I ^' i . j 



Tflwg 9 / + — (-, -if 4- -^l' ) Tang 9* ) Us), 



4, 20 



(3 -6z-^^—\ Tang 9« 



vel. Si- pro J/ et ? valbres adhibeantur, quos in paragrapho 

 pro^ime antecedfenle attulimus, fiet denique 



SS"-S'3Sp 1 _ ^ f{' .0771222s ^ 



\ Tang 9 ]Tang< 



1 . 7^S7720 y S . 8S200SSS ^ 



+ , 00017 J4f\ — . oooooozi6Si\ 



\TavgS^ \ Tang 9^^ 



a . 2jpisop ) J . joosjis ) " ^ 



atque ex liac tandem formula sequentem computavimus re- 

 fractJonum tabulam, in qua scilicet coluinna ^ apparentem^ 

 exliibet a vertice distantiamj S refractionem, qualis pro 



