[NDEX 



455 



Cloudiness of objective and ocular, 109 



removal of cloudiness, 93, 109 

 Coarse adjustment of microscope, 27, 97 

 Cobweb micrometer, 148 

 Collection of microscopic material, 334 

 Collodion, 353 



castor-xylene method with, 391 



coating glass rod, 116 



cementing, 353 



clarifying of, 391 



fastening sections to slide, 386 



handling sections with paper, 390 



hardening, 388 



method, 3S 7-392 



method with paraffin, 391-392 



transferring sections from knife to 

 slide, 390 

 CoUodionizing sections, 353 

 Color photography, 244-245 

 Color-correct photography, 234-240 

 Color images, 80 



law of, 253 



production of by polariscope, 267 



screens, 234-240 



spectral, 248 

 Combinations in objectives, 20-21 

 Comparing two microscopic fields, 122 

 Comparison ocular (fig.), 123 



prism, 249 . 



spectrum, 253 

 Compensation ocular (tig.), 24, 292-294 



434 

 Complementary spectra, 253 

 Concave lenses, 2S1, 427 



mirror, use of, 54 

 Condensers, 57-76, 297, 434 



Abbe, 59 



achromatic, 57, 59 



apochromatic, 58 



centering, 59-60 



homogeneous immersion, 64, 297 



image of scale for micrometry, 1 55 



in drawing for models. 419-420 



lighting the field with, 63 



mirror with, 63 



non-achromatic, 58-50 



numerical aperture of, 60 



photo-micrography with, 228-231 



source of light with, 60-61 



standard size, 100 



substage, 57 

 Condensing lens for projei tion, -he of, 



233, 420 

 Congo glycerin, 354 

 Congo red, 354 

 Construction of images, 1 2 



real and virtual images, 13-14 

 Continuous spectrum. 

 Contour, double, 1 1 1 

 Converging lens, 281, 427 

 Convex lens, 2S1 

 Correction, chromatic or color, 28S-294 



of the aberration of lenses, 284-20} 



cover-glass, 285 



over and under correction, 285-288 

 Cotton, collodion, 353 



soluble, 353 

 Counteretaining, 395-396 

 Cover-glass or covering glass, 313 



aberration, (fig.) 78, 2S5-286 



adjustment, direi tions, 7S-79, 2: 



adjustment for in photO-mii 

 raphy, 220 



adjustment and tube length, 286- 

 288 



anchoring, 327 



cleaning, 310-318 



correction, 286- 288 



effect on rays from object, 40-43, 

 286 



focusing with and without, 42-43 



for unadjustable objectives 

 287 



gauges or measures .18-320 



measuring the tlii. I 43-45. 



318 



sealing, 326 



thicknes .10 



tube-length and cover-thickn< 

 288 



variation in thickness, 319 



wiping, 317 



working distance with and fig., 4c 

 Critii al angle, 64, 

 Crystals for pedesis, 1 10 

 Currents, diffusion, avoidance. 11;. 



