11)4 



Centering Screws, 48, 55 



Chromatic Aberration, 24, 25, 94, 142 



Clips, 48 



Closed Adjustment, 98 



Coarse Adjustment, 47, 62, 177 



Coddington Lens, 29 



Collar, 47 



Collective Lens, 74 



Colors, Primary, 24 



Compensating Ocular, ..-..- 112, 117 



Compound Microscope, 15, 42 



Concave Lenses, 18, 19 



Condenser, Abbe, 154, 182 



Condenser, Achromatic, 155 



Condenser, Aperture of, 160 



Condenser, Centering of, 157 



Condenser, Focusing of, 159 



Condenser, Purpose of, 154 



Continental Eyepiece 115 



Continental Microscope, 50, 176 



Convex Lenses, 18, 19 



Corrected Lens, 26 



Cover Glass, 49, 83, 96, 142 



Cover Glass, Corrections for, 96-103 



Cover Glass Gauge, ; 101 



Cover Glass, Thickness of, 96 



DIAMETERS 39 



Diaphragm, 24, 49, 70, 114 



Diatoms, How to Resolve, 150, 151, 152 



Diatom Test Plate, 132 



Diatoms, When Resolved, 139 



Dispersive Quality, 24 



Dissecting Microscopes 28 



Dissecting Microscope, How to Use, 35 



Dome Diaphragm, 70 



Double Nose-piece 60 



