INDEX 



A 



Aberration, chromatic, 288 



correction of, 285, 289, 294 



cover-glass and fig. of, 78, 285-286 



spherical, 284-285, 288 

 Absolute alcohol, 348 



index of refraction, 273 

 Absorption spectra, 251, 259, 264 

 Achromatic condenser, 57-59 



objective, 21, 291 

 Achromatism, 290, 435 

 Achromatization, 290, 435 

 Actinic focus, 222 

 Adjustable objective, 22, 77, 229 



in photo-micrography, 229 

 Adjustment of analyzer, 267-269 



coarse or rapid; fine, 27, 97 



of objective for cover-glass, 77, 229 

 Aerial image, 31, 33 

 Air bubbles, 80, 112 

 Albumen fixative, 348 

 Alcohol absolute, 348 



ethyl, 348-349 



denatured, 349 



methyl, 349 



mixtures, how to make, 347-348 



picric, 363 

 Alcoholic dye, 393 

 Amid prism, 247 

 Amplifier, 139 



for projection, 201 

 Amplification of microscope, 131 

 Analyzer, 264-266 

 Angle of aperture, 294 



critical, 275 



visual and fig., 6, 127, 128-129 

 Angstrom and Stokes law, 252-253 

 Angular aperture, 294-296 

 Anisotropic objects, 268 

 Apcrtometer, 298 



Aperture, angular and numerical deter- 

 mination of, 207 

 numerical, 294-297 

 and diaphragm, 62-63 



and opacities, 303-304 



table of, 296 

 Aplanatic objectives, 2 1 

 Apochromatic condenser, 58 



objectives, 291, 437 

 Apparatus and material for chapters, 

 36, 77, 107, 127, 160, 206, 246, 

 270, 312, 368 

 Apparent size of objects, 9 

 Appearances, interpretation, 107, 126 

 Arc lamp and fig., 72 

 Arrangement of minute objects, 336 



of serial sections, 404 

 Artificial illumination, 4S-49 

 Autochrome photographic plates, 244- 



245 

 Avoidance of inversion in drawings, 

 172-176 



vibrations in photography, 217- 

 218 

 Axial light, 65 



experiments with, 65 

 Axis, optic, 282-284 



of projection microscope, 200-201 



secondary, 1 1 , 284 



B 

 Back combination, 20 

 Bacteria, 334-335 



Bacterial cultures, photographing, 213 

 Balsam, 339, 350 



acid, 351 



alkaline or neutral, 350 



bottle, 328-329 



filtering, 350 



mounting in, 329-330 



453 



