Collar, 31 



Collar Correction, 143 



Collective or Field Lens, 58, 107 



Compensating Eyepiece, 103, 111 



Complete Substage, 156158 



Compound Microscope, 1, 27 



Concave Lenses, 4, 6 



Concavp Mirror, 121, 152 



Focal Point of, 122 



Use with Condenser, 159 



Condenser, 122, 154166 



Aperture of, 162 



Bull's Eye, 153 



Centering of, 159 



Focusing of, 161 



Illumination with, 164 



Oblique Light with, 164 



Purpose of, 154 



Substage, 156 



Use with Immersion Objectives, 162 



Continental Type Eyepiece, 107 



Continental Type Microscope, 35 



Convex Lenses, 4, 5 



Focal Length of, 5, 6 



Correct Position at the Microscope, 115 



Corrected Lens, 13 



Cover Glass, 34, 74 



Abbe Test Plate for Measuring, 142 



Correction for, 88 



Influence upon Objective, 140 



Influence upon Angular Aperture, 74 



Influence upon Spherical Aberration, 88 



Sizes of, 141 



Standard, 91 



Thickness to Use, 93 



Cover Glass Gauge, 93, 193 



