INDEX. 



231 



H 



Hairs, examination of, 90. 



Half-tones from photo-micrographs, 208, 

 216. 



Hardening collodion, 158 ; tissue, 157, 

 164. 



Heliostat, 209. 



Hematoxylin, 178. 



Hemoglobin spectrum, 132, 133. 



Herapath's method of determining mi- 

 nute quantities of quinine, 181. 



Histological elements, isolation of, 154. 



Histology, physiological, 173. 



History of photo-micrography, 184. 



Holder, lens, 8 ; needle, 146. 



Homogeneous immersion objective, 17- 

 19 ; cleaning, 56 ; experiments, 55 ; 

 for laboratory microscope, 61 ; light 

 utilized, 18, 21 ; numerical aperture, 

 21. 



Homogeneous liquid, 12, 213 ; tester for, 

 55. 213. 



Huygenian ocular, 22, 24, 31. 



I -J 



Illuminating, cone, aperture of, 43, 44 ; 

 for condenser, 44 ; objective, 14 ; 

 power, 21, 22. 



Illumination, for Abbe camera lucida, 

 116; artificial, 36, 48; artificial for 

 photo-micrography, 194; centering 

 image of source of, 41-45 ; central 

 with air andoil, 84, 85 ; dark-ground, 

 36, 47, 48 ; daylight, 34 ; of entire 

 field, 49 ; lamp for, 48 ; methods of, 

 34, 47 ; for micro-polariscope, 137 ; 

 for micro-spectroscope, 129 ; oblique, 

 with air and oil, 84, S5 ; for photo- 

 micrography, 192 ; for Wollastou's 

 camera lucida, in. 



Illuminator, 39-40; Abbe, 44, 47 ; Abbe, 

 axial and oblique light, 36 ; Abbe, 

 experiments, 46; Abbe, mirror and 

 light for, 46 ; achromatic, 40 ; cen- 

 tering and arrangement, 45 ; immer- 

 sion, 45. See also condenser. 



Image, actinic, 184; aerial. 30, 31 ; cen- 

 tering i. of source of illumination, 

 42 ; color, 49, 51. 56 ; with dry apo- 

 chromatic and water immersion ob- 

 jectives, 13 ; erect, 1 ; inverted, 7 ; 

 inverted, real of objective, 29 ; of 

 flame, 43 ; formation of. 3 ; geomet- 

 rical construction of, 5 ; and object, 

 size and position, 5, II, 96 ; real, 5, 

 10, 22, 29-31, 92 ; refraction, 49, 55 ; 

 retinal. 6, 10, 31 ; swaying of, 46 ; 

 virtual i. and standard distance at 

 which measured, 6, 31, 92. 



Image-power of objectives, 19. 



Imbedding, 158, 165. 



Immersion fluid, 55, 213 ; illuminator, 



45 ; liquid, 55 ; objective, 12, 55, 56, 



61. 

 Incandescence or line spectra, 123. 

 Incident light, 34. 

 Index of refraction, 50; of medium in 



front of objective, 17-18. 

 Infiltration with chloroform, 165 ; col- 

 lodion, 157, 158 ; ether, 157 ; paraffin, 



165. 

 Initial magnification, 214. 

 Ink for labels and catalogs, 173 ; for 



drawing, 216. 

 Interpretation of appearances under the 



microscope, 80-91. 

 Inverted image, 7, 29. 

 Iris diaphragm, 40, 181. 

 Irrigating with reagents, 150. 

 Isochromatic plates, 194, 197. 

 Isolation, 154 ; with formaldehyde, 154 ; 



nitric acid, 155. 

 Isotropic, 137. 



Japanese filter or tissue paper, 57, 160. 

 Jelly, glycerin, 177. 

 Jena glass, 63. 

 Jurisprudence, micrometry in, 108. 



Labels and catalogs, ink for 173 ; prep- 

 aration of, 179. 



Labeling microscopical preparations, 

 171 ; photographic negative, 197 ; 

 serial sections, 171. 



Laboratory compound microscope, 61. 



Lamp, microscope, 48 ; spirit, 164. 



Lamp-light, 36. 



Law of color, 124. 



Lens, concave, 3 ; converging, 3 ; con- 

 vex, 3 ; e3'e, 22 ; field, 22, 26 ; holder, 

 8, 155, 156, 199 ; paper, 57 ; system, 

 10. 



Lens-systems, 10. 



Letters in stairs, 82 ; for photo-engrav- 

 ing, 218. 



Lettering oculars, 26. 



Light, with Abbe illuminator, 46 ; ace- 

 tylene, 36, 48 ; artificial, 46 ; axial, 

 35, 39; axial with Abbe illuminator, 

 46 ; direct, 34 ; central, 35, 39 ; filters, 

 191 ; incident, 34 ;' with mirror, 39 ; 

 oblique, 35, 39 ; oblique with Abbe 

 illuminator, 46 ; lamp, 36 ; for pho- 

 to-micrography, 192 ; polarized, 136 ; 

 reflected incident or direct, 34 ; trans- 

 mitted, 35 ; utilized with different ob- 

 jectives, 13 ; wave length of, 129. 



Lighting, 34 ; for Abbe camera lucida, 

 115 ; artificial, 48 ; experiments, 36 ; 

 and focusing, 33, 36 ; for micro- 

 polariscope, 137 ; for micro-spectro- 



