234 



INDEX. 



move, 82 ; Carnpani's, and cob-web 

 micrometer, 23 ; compensating, 24, 

 26 ; compound, 23 ; continental, 23 ; 

 deep, 23 ; designation by magnifica- 

 tion or combined magnification and 

 equivalent focus, 26 ; diaphragm, 28 ; 

 dust, how to determine, 82 ; equiva- 1 

 lent focus of, 26 ; erecting, 23 ; eye- 1 

 point of, demonstration, 32 ; field- i 

 lens, 31 ; filar micrometer, 23, 26, 

 104 ; focus, equivalent of, 26 ; tunc- , 

 tion of, 30, 31 ; goniometer, 23 ; high, 

 23 ; holosteric, 23 ; Huygenian, 22- 

 24, 31 ; iris diaphragm, 18 [ ; index, 



23 ; Jackson micrometer, 23 ; Kell- 

 uer's, 23 ; lettering of, 26 ; low, 23 ; • 

 micrometer, 23, 25, 102, 105 ; mi- 

 crometer, micrometry with, J05 ; mi- 

 crometer ratio, 106; table of magni ; 

 fication of, 99 ; micrometer, valua- 

 tion of, 102 ; micrometer, varying 

 valuation, 105 ; micrometer, ways of 

 using, 105 ; micrometric, 23 ; micro- 

 scopic, 22, 23 ; negative, 22, 23 ; num- 

 bering, 26 ; orthoscopic, 23, 28 ; par 

 focal, ]6, 24, 37 ; periscopic, 24, 28 ; 

 for photo-micrography, 25, 189; pho- 

 to-micrography with and without o., 

 198, 799 ; pointer, 63 ; positive, 22 ; 

 projection, 25, 189 ; projection, des- 

 ignation of, 189; projection, use of 

 in photo-micrography, 199, 202 ; put- 

 ting in position and removing, 27 ; 

 Ramsden's, 24 ; screw micrometer, 

 26, 103 ; searching, 24, 25 ; shallow, 



24 ; solid, 24 ; spectral, 24, 106 ; spec- 

 troscopic, 24, 120; stauroscpic, 24 ; 

 stereoscopic, 24 ; table of field of, 2S ; 

 working, 25. 



Oil, and air, appearances and distinguish- 

 ing optically, 85 ; removal, 58 ; re- 

 moval from sections, 161. 



Oil-globules, with central illumination, 

 84 ; with oblique illumination, 85. 



Oil-immersion objectives, 12. 



Optic axis, 2, s ; of condenser, or illumi- 

 nator, 35 ; of microscope, 6. 



Optical center, 2, 3 ; combination. 104, 

 105 ; focus, 13 ; parts of compound 

 microscope, 10, 61 ; parts of micro- 

 scope, care of, and testing, 57, 60 ; 

 section, 87 



Order of procedure in mounting objects, 

 dry or in air, 147 ; in glycerin, 149 ; 

 in glycerin jelly, 150 ; "in resinous 

 media by desiccation, 152 ; in resin- 

 ous media by successive displace- 

 ments, 153 



Ordinary ray with polarizer, 136. 



Orthochromatic plates, 191. 



Orthoscopic ocular, field with, 2S. 



Outline, distinctness of, S5. 



Over-correction, 5. 



Oxy-hemoglobin, spectrum of, 122, 132. 



Pantachromatic objective, 13. 

 Paper, aristotype, 208 ; bibulous, filter, 

 lens, or Japanese, 57, 160 ; bromide, 

 208 ; for cleaning oculars and object- 

 ives, 57, 160 ; funnel, 775 ; Usago, 

 160. 

 Parachromatic objective, 13. 

 Paraffin, 179; chloroform, 176; chloro- 

 form, infiltrating with, 165 ; hard, 

 166 ; imbedding in, 165 ; method, 

 164 ; removal from lenses, 58 ; re- 

 moving from sections, 166. 

 Parfocal oculars, 16, 24, 37. 

 Parts, optical and mechanical of micro- 

 scope, 10, 61 ; testing, 60. 

 Pedesis, 88 ; compared with currents, 

 88 ; with polarizing microscope, 89 ; 

 proof of reality of, 89. 

 Penetrating power, 21, 22. 

 Penetration of objective, 21. 

 Perigraphic objective, 196. 

 Periscopic ocular, field with, 28. 

 Permanent mounting, 147 ; preparations 



of isolated cells, 155. 

 Permanganate of potash, absorption spec- 

 trum of, 122, 131. 

 Picric-alcohol, 179 

 Pin hole diaphragm, 45. 

 Pipette, i6r. 

 Photo engraving, 216, 219 ; drawing for, 



216-219 ; lettering for, 218. 

 Photographic negatives, marking, 197 ; 

 objectives, 196 ; for photo microgra- 

 phy, 196. 

 Photography, basis for figures, 206 ; com- 

 pared with photo-micrography, 1S3 ; 

 indebtedness to microscopy, 183, 

 184 ; lighting large objects for, 194 ; 

 objectives for. 196 ; of objects in alco- 

 hol or water, 205 ; with a vertical 

 camera, 205. 207. 

 Photogravures from photo-micrographs, 



208. 

 Photo-micrograph, 183; developers for, 

 197 ; determination of magnification 

 for, 202 ; at 5-20 diameters, 193 ; 20- 

 50 diameters, J98 ; 100-150 diame- 

 ters, 201 ; 50'- 2000 diameters, 203 ; 

 objects suitable for, 191 ; prints of, 

 208 ; plates for, 194 ; reproductions 

 of, 20S ; with and without an ocular, 

 798 

 Photo-micrographie camera, 786, 188, 790, 



792, 193, 202. 

 Photo-micrography, 7S3-204; cover-glass 

 correction, 201 ; apparatus for, 785 ; 

 compared with ordinary photogra- 



