pe.O. Object. It is represented without acover-glass. Ordinarily objects are coveredzvhether examined with immersion or with dryobjectives. Stage. Section of the stage of the micro-scope. 2 22. Non-Achromatic or Chromatic Objectives.—These are objectivesin which the chromatic aberration is not… … < ■//. /] MICR( >S( < /£ AX/) AC( ESSi >A7/:S 15 \ 23. Achromatic Objectives.—In these the chromatic and the sphericalaberration are both largely eliminated by combining concave and convexlenses of different kinds of glass so disposed that their opposite aberrationsshall correct each…
Microscopy
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