FIG. 323. PLANO-CONVEX LENS WITH LEAST ABERRATION, 809 



FIG. 322. PLANO-CONVEX LENS WITH GREATEST ABERRATION, 



FIG. 320. CROSSING OF LIGHT RAYS WITH GREATEST ABERRATION, 



FIG. 32.1A. LIGHT CONK WITH THE RADIANT ABOVE THE OPTIC Axis, 57 



