4o6 



DE ABERRATIONE RADIORUM A FOCO. APPENDICE V. 1665. 



9 ^ad[de]- 



-b NL 

 9 ^ 



^b 00 — ^ 00 EL bon 

 9 3 



nam aberratio paralleli A C eft-J MB et MB oo <ib 



3 



T^ r^ , i^aa— iAab4-Abb 6aa — A.ab 



-RE 00 q^ — 2^—^ :^ — ^ — 00-^ ^S— ' 



• 6a— ib 6a- 



BE 00 ^ — -> MB prox. n o t a n d u m. 



BE 00 RB— RE 00 q^ — ib— ''^'^'^ x^t^c^^c^.. ^v^ !t^30^— i- 



"^ 6a— ib 6a— ^b 3'^~b 



[Fig. 8.] 



M 



§8=). 



^ 00 BA femidiam.arcus BC;BR oo ^a-^ radius MC tendit 

 adR;BGoo^. 



BG^3) 00 2^; RG% RB; RA, RP proportionales 4). 



P eft concurfus punélum quod faceret fiiperf. convexa BC. 



aberratio PD effet ibi oo 7vBG,utexcalculopag. aSapparet s). 



GE 00 -GP*^). E efl: punélum concurfus radiorum ad R 



tendentium per lentem planoconvexam BCG. quseritur aber- 

 ratio EL. 



CI eft arcus centro P vel D radio PC vel DC. PC vel DC 

 cenfetur dupla AB. GI oo — BG ^^ oo— b. 



Si GN 00 - GD, erit NL oo| GI(videpag. 39 in fine 0); 



hoc eft NL 00 ^~ BG 00 -^ ^. 

 12 12 



N jam confideratur tamquam fi effet punétum concurfus axi 

 proximoruni tendentium ad D. tune radij CD ^) aberratio eft 

 NL. quœ ad datam NE additur et facit EL. datur auteni EN 

 quia datur PD et PG ideoque et DG, unde et NG. nam ut ex 

 PG datur EG, fie ex DG datur NG. 



