, ,r> VISION \vrni THE COMPOUND MICROSCOPE 



10 

 o 



'' '' T~\ i "r~\ -^ 



7.1 

 _8 



' _ __ O' _ 



64- 8 



75 



=Q'- 1-875 . ... (viii) 



Until Lenses. Distance apart = B C =] = -25 ; P' Q = -21 + "25 



4 



4(> = r ; /'= focus of No. 1 lens = -947; /'' = focus of No. 2 

 ],.ns= -- 1-875. 



F - P = P + = P H 



/' + /" -c -947 -- 1-875 -4(5 -l-:ws 



= P---314 . . (ix) 



__ Q, c\/" _ () , -4(i x - - l-87_5__ 



./'+./" " -947- -1-875 -- "46 



.B- =E- 



''' 



./'+/'' -. -947 1-875 -46 



- !" + E' + . 



/ + ./" ! 17 -- 1-875-^46 



= E' + _ i 1 ; 3 7 8 7 5 = E ' + l-28. . (xii) 

 ''/= V-; // = ^ = 1^1=1-6384 . ... (xiii) 



