19,-) 



Doublet So 



Drawing Board, 166, 168 



Draw Tube, 46, 66 



Dry Objectives, 77, 85, 86, 144 



ENGLISH EYEPIECE, 115 



Excelsior Dissecting Microscope, 35 



Eye, Which to Use, 130 



Eye Lens, 74 



Eyepiece, 46, 72, 112, 113, 182, 183 



Eyepiece, Care of 180 



Eyepiece, Diaphragm in 119 



Eyepiece Micrometer, 171 



Eyepiece, Parfocal, 119 



Eyepiece, Rating of 117 



Eyepiece, to Attach, 121 



FIELD, FLATNESS OF 104, 118 



Field Lens 74 



Field of Objectives, uo, 118 



Filar Micrometer, 173 



Fine Adjustment, 47, 65, 179 



Flatness of Field 104, 118 



Flint Glass, 27 



Focusing, 128 



Focal Distance, 19 



Focal Point, 19, 21 



Focus, Real, 20 



Focus, to Determine, 20 



Focus, Virtual 20 



GLASS COVERS, 49, 83, 96, 142 



Glass, Crown, 27 



Glass, Flint, 27 



Glass, Jena, 74 



Glass, Reading, 31 



Glass Stage 56 



Graduated Head 65 



Graduated Stage, 55 



