Lens Holders or Stands, 18 



Lens Systems, 66 



Lenses, How Made, 67 



Magnifying, 14 24 



Optical Properties of, 1 



Simple, 4 



Stopped down, 10 



Linear Magnification, 24 



Linen Tester, 19 



Lister's Method for Measuring Angular Aperture, 81 



Low Power Objectives, 62, 99 



How to Focus, 125 



Text Objects for 132 



Lower Iris Diaphragm, . 158 



Magnifier, Tripod, 18 



Magnifiers, 14-24, 193 



Caution in Purchasing, 16, 24 



How to Use, 21 



Magnification with Camera Lucida, 172, 173 



Magnifying Power. 7, 21, 24, 60, 84, 99 



To Determine, 25, 176 



Measuring the Size of an Object, 177 



Mechanical Stage, 40, 120, 188, 193 



Medium Power Objectives, 62, 99, 136 



Test Objects for, 133 



Meniscus Lenses, 4 



Metal for Microscope, 186 



Micrometer, Eyepiece, 178 



Filar, 180 



, Stage, 177 



Micrometer Eyepiece, 109, 110, 178, 181 



Micrometer Screw Adjustment, 32, 48, 199 



Microscope, Binocular, 44 



Care of, 194 



Caution in Purchasing, 24 



Classification of, 34 



