INDEX 



Abbe, achromatic condenser, 86, 201 



aperture and focal length, 119 



apochromatic objectives, 199 



binocular ej'epiece, 52, 202 



camera, use of, 161 



inventions, 198 



meaning of aplanatic, 86 



oil-immersion objective, 132, 199 



papers on microscope, 211 



sine law, 86 



stereoscopic vision, 49 



test plate, use, 260 



three-millimeter objective, 118 



uncorrected condenser, 81 

 immersion, 201 



working aperture, 12 

 Aberration, spherical, star test for, 



257 

 Acetic acid as mounting medium 



103 

 Achromatic objectives, 125 

 Adjustment of condenser, 89 

 Agapanthus umbellatus, chromo- 



meres, 221 

 Agar, for mounting, 102, 178 

 Ainslie, best tube length, 56 



lamp distance, 11 

 Air, mounting in, 102, 255 

 Akehurst, double mirror, 41 

 Allium triquetrum, prophases of, 225 

 Aloe striata, chromomeres, 220 

 Amoeba, in cultures, 240 

 Amphipleura pellucida, in hyrax, 



235 

 Amplifier, use of, 143, 257 

 Aperture, circle of condenser, 90 



concave mirror, 137 



condenser, 87, 256 

 nifirking, 267 



Aperture, condenser, uncorrected, 83 



lens, 18 



and magnification, 119 



objective, measuring, 267 



reduction of, 255 



working, 26 

 Apertures in air, water, and oil, 255 

 Apochromatic objectives, 125 

 Apparatus, necessary, 156 

 Ascaris, chromosomes, 238 

 Aspheric condenser, 85 



condensing lens, 71 

 Astigmatism, correction for, 44 



B 



Bacteria, alive, 232 



without cover-glass, 233 



dark field, 232 



dry, in dark field, 234 



India-ink smear, 234 



mounted dry on cover, 102, 233 



nigrosin smear, 234 



water-immersion objective, 233 

 Baker, centering sleeve, 139 

 Barnard, mercury arc, 206 



neutral screens, 11, 78 

 Bausch and Lomb, achromatic 

 objective, 158 



aspheric bull's eye, 71 



aspheric condenser, 205 



booklet of instructions, 209 



eyepieces, 148 

 Becher, anisol, 179 

 Beck, advanced book on the micro- 

 scope, 210 



dark-field condenser, 202 



elementary book on microscope, 

 209 



large cones, 203 

 papers on, 212 



303 



