I\I)KX 



457 



Dutch compound microscope (fig.)i 429 

 Dyes in microscopy, 392-393 



E 



Fikonometer (fig.), 154-155 



micrometry and magnification with, 



154-155 

 Elastic stain, 355, 397 

 Electric arc lamp, 417-419 



incandescent for projection, 41 7-420 

 Electrification of paraffin ribbons, 381 

 Embryos, camera for, 210 



photographing, 209 



serial sections of, 402 

 Enlargements of photographs, 232-234 



focusing and printing for, 233 

 Eosin, 355-356 



counterstaining with, 395-396 

 Eosin-methylene blue, 356, 398 

 Equivalent focus, oculars and objec- 

 tives, 19 

 Erect images, 174-176 

 Erecting binocular, 88 

 Ether-alcohol, 356 



sulphuric, 356 

 Ethyl alcohol, 348 

 Examination of dust, etc., in rooms, 1 23- 



124 

 Excluder of light (fig.), 226-227 

 Experiments, 15, 28-34, 37-40, 53-56, 

 61-70, 77-82, 88-91, 109-125, 

 224-231, 258-264, 267-269 



adjustable and immersion objec- 

 tives, 77-82 



binocular microscopes, 88-91 



compound microscope, 28-34 



dark-ground or field, 67-75 



focusing, 37-40 



interpretation of appearances, 109- 

 125 



lighting, 53-70 



micro-polariscope, 267-269 



micro-spectroscope, 258-264 



mounting, 321 



photo-micrography, 224 



simple microscope, 15 

 Exposure for photographs, 240-241 



with color screen, 241 



Eye and mil roscope, 5 

 visual acuity, 1 



visual angle, 

 Eyes, care of, 94 96 



muscae volitantes in, 122 



unlikeness of the two, 9] 

 Eye-lens of the ocular. 25, 508-309 

 Eye pie< e or ocular, 23 



demonstration. 433 



micrometer, 143, 153 



parfocal, 58-39, 309 

 Eye-point, 15, 33 



demonstration of, ^^ 



V 



Tarrant's solution, 356 



Field and fig. of, 29, no 

 camera lucida, 161-162 

 illumination of, 48, 63, 109-110 

 view with microscope. 2g 



Field-lens of ocular, ^^, 308-309 

 dust on, 109 



Filar micrometer ocular, 147-149 



Filtering balsam, 350 



Fine adjustment, 27, 97-98 



Fir, balsam of, 350 



fixation, 368 



Fixative, albumen, 348 



Fixer, 368 



Flemming's lluid, 356 



Fluid, Midler's, 362 

 Zenker's, 366 



Fluorite lens, 1 1. 202. 436-437 



Focus, 11, 284 



actinic and visual, 222 

 appearances with different, m 

 equivalent of objectives and ocu- 

 lars. i<). 27 

 depth of and aperture, 503-304 

 principal, 1 1 12, 2S4 



FOCUS, real. [2 14 

 virtual. 



visual and actinic, 222 

 Focusing, 15. 36 



adjustments, testing, 07-98 

 binocular microscope ior the I 



eyes, 89 

 compound micros* ope, 



