2 9 6 



INDEX 



immersion, n ; panto-chromatic, 13 ; 

 para-chromatic, 13 ; for photography, 

 208, 212, 214, 224; for photo-microg- 

 raphy, 224; projection, 13, 212, 214, 

 259 ; putting in position and remov- 

 ing, 26 ; semi-apochromatic, 13; table 

 of field, 29 ; terminology of, 10 ; un- 

 adjustable, 12; variable, 13; visual 

 and actinic foci of, in photo-microg- 

 raphy, 226 : water immersion, 17-19, 

 56 ; working distance of, 39-40. 



Oblique light, 36, 41 ; with Abbe illumi- 

 nator, 48 ; with a mirror, 41, 50. 



Ocular, various forms, 22-25 \ cloudiness, 

 how to determine and remove, 60, 92; 

 equivalent focus of, 25, 29, 273 ; eye- 

 point of, 32 ; field-lens, 32 ; filar or 

 screw micrometer, 26, 117; focus, 

 equivalent of, 25, 273 ; function of, 

 31-33 ; indicator, 67, 247 ; iris dia- 

 phragm for, 157 ; lettering and num- 

 bering, 26 ; micrometer, micrometry 

 with, 114-121 ; parfocal, 24, 38; for 

 photo-micrography, 224, 232, 235 ; 

 pointer, 247 ; projection, 260 ; spec- 

 troscopic,i34 ; standard size for, 26; 

 table, effect on field, 29. 



Oil, and air, appearances and distinguish- 

 ing optically, 95 ; removal, 61 ; re- 

 moval from sections, 179. 



Oil-globules, with central and oblique 

 illuminations, 95. 



Oil immersion objectives, ri. 



Opaque objects, lighting, 144, 238 ; pho- 

 tography of, with microscope, 235- 

 240 ; projection of, 267. 



Opera glasses, 262. 



Optic axis, 2, ; of condenser or illumi- 

 nator, 47 ; of microscope, 10. 



Optical, bench, 237 ; center, 2 ; focus, 12 ; 

 parts of compound microscope, 9, 64; 

 parts of microscope, care of, and test- 

 ing, 60, 63 ; section, 98. 



Order of procedure in mounting ob- 

 jects dry or in air, 167 ; in glycerin, 

 170; in glycerin jelly, 170: in resin- 

 nous media by desiccation, 172 ; in 

 resinous media by successive dis- 

 placement, 172. 



Ordinary ray, with polarizer, 150. 



Orthochromatic plates, 217. 



Orthoscopic ocular, field with, 28. 



Outline distinctness of, 96. 



Oven paraffin, 279. 



Over-correction, 5. 



Oxy-hemoglobin, spectrum of, 138, 147. 



Paper, bibulous, filter, lens, or Japanese 

 for cleaning oculars and objectives, 

 60, i So. 



Paraffin, 185, 203 ; filtering, 185 ; infil- 

 trating with, 185 ; dish for infiltrat- 

 ing, 279; imbedding in, 185, 186 ; 

 method, 183 ; oven, 279 ; pail for 

 melting, 184 ; removal from lenses, 

 61 ; removing from sections, 188. 



Parfocal oculars, 24, 38. 



Parts, optical and mechanical of micro- 

 scope, 8, 64 ; testing, 63. 



Pedesis, 99 ; compared with currents, 99 ; 

 to overcome, 100 ; with polarizing 

 microscope, 100 ; proof of reality of, 



100. 



Penetrating power, 21. 



Penetration of objective, 21. 



Permanent mounting, 167 ; preparations 

 of isolated cells, 175. 



Permanganate of potash, absorption spec- 

 trum of, 136, 146. 



Petri dish, photographing bacterial cul- 

 tures in, 241. 



Petroleum light, 37, 229 ; as color screen, 

 220. 



Pharmacological products, examination 

 of, 158. 



Photo-engraving, drawing for, 273 ; let- 

 tering for, 274. 



Photographic, camera, 207 ; negatives, 

 labeling, 211, 214 ; objectives, 208 ; 

 prints, 211. 



Photography, back -ground for, 209 ; of 

 bacterial cultures, 241-242 ; color- 

 correct, 217 ; of colored objects, 218 ; 

 compared with photo-micrography, 

 222; of embryos, 211-214; focusing 

 and exposure, 206, 213 ; indebtedness 

 to photo-micrography, 220; of large 

 transparent objects, 214-216; lighting 

 for, 208, 216; metallic objects, 235- 

 240 ; objectives for, 208, 212, 214 ; of 

 objects in alcohol or water, 206 ; 

 opaque objects, 235-240 ; plates for, 

 217; stage for, 211 ; with vertical 

 camera, 205-209, 225. 



Photo-micrograph, 220; determination 

 of magnification for, 233 ; at 5-20 di- 

 ameters, 212 ; 20-50 diameters, 230 ; 

 100-2500 diameters, 233 ; of metallic 

 surfaces, 235-240 ; objects suitable 

 for, 227 ; of opaque objects, 235-240 ; 

 prints of, 211 ; plates for, 217 ; repro- 

 ductions of, 232 ; with and without 

 1 an ocular, 230-234. 



Photo-micrographic, camera, 222, 225, 

 236 ; outfit, 236-237 ; stand, 231. 



