INDEX. 



93 



Field-lens, 8, 9; action of, 14 ; of ocular, 8. j 



Filter paper, Japanese, 26. 



Filtering balsam, etc., paper funnel for, 



83. 



Fluid, immersion, 4. 



Focal distance or point, principal, 3 ; 

 length, equivalent, 3 ; 



Focus, 2 ; always up, 18 ; chemical, 4 ; 

 of objectives, equivalent, 3 ; of ocu- 

 lars, equivalent, 10 ; optical, 4 ; prin- 

 cipal, 1-3. 



Focusing, 2, 15 ; with compound micro- 

 scope, 15 ; experiments, 17 ; with 

 high objectives, 18 ; with low ob- 

 jectives, 17 ; objective for micro- 

 spectroscope, 59 ; with simple micro- 

 scope, 15 ; slit of micro-spectroscope, 



56. 

 Frauuhofer lines, 55. 

 Front combination or lens of objective, 



3 ; system, 5. 

 Function of objective, 12, 13 ; of ocular, 



13, 14- 



Gelatin, liquid, preparation of, 83. 



Glass, cleaning mixture for, 70 ; rod ap- 

 pearance under, microscope, ^t, ; 

 slides or slips, 66 



Glue, liquid, preparation of, 83. 



Glycerin, mounting objects in, order of 

 procedure, 73 ; removal, 26. 



Glycerin jelly, mounting objects in, or- 

 der of procedure, 74 ; preparation 

 of, 82. 



Gold size, removal from lenses, 27. 



Goniometer ocular, 9. 



Graduation of adjusting collar, 23. 



Grating, diffraction, 54. 



Ground glass, preparation of, 12. 



H 



Hsemaglobin, 61 ; reduced h., 61. 



Hairs, examination of, 35. 



Herapath's method of determining mi- 

 nute quantities of quinine, 85. 



High oculars, 5, 9. 



Highly refractive, 33. 



Homogeneous immersion objectives, 4 ; 

 cleaning, 25 ; experiments, 24 ; for 

 laboratory microscope, 28. 



Homogeneous liquid, 25. 



Huygeniau ocular, 9. 



I-J 



Illumination for Abbe camera lucida, 51 ; 

 artificial, 15, 20 ; central with air and 

 oil, 31 ; dark-ground, 16 ; dark- 

 ground, with Abbe illuminator, 21 ; 

 dark-ground, with mirror, 21 ; 

 oblique, with air and oil, 32 ; for 

 Wollaston's camera lucida, 48. 



Illuminator, 1 ; Abbe, 19 ; Abbe, axial 

 and oblique light, 20 ; Abbe, exper- 

 iments, 20; Abbe, mirror and light 

 for, 20 ; centering and arrangement, 

 19, 20 ; immersion, 20. 



Image, aerial, 13 ; color, 22, 25 ; erect, 

 1 ; inverted, 1 ; inverted, real of ob- 

 jective, 13 ; real, 1 ; real, inverted, 

 3 ; refraction, 22, 25. 



Immersion fluid, 4 ; illuminator, 20 ; 

 liquid, 4 ; objective, 4, 24. 



Incandescence spectra, 56. 



Incident light, 15. 



Index of refraction of medium in front 

 of objective, 7. 



Ink for labels and catalogs, 79. 



Interpretation of appearances under the 

 microscope, 29. 



Inverted image, 1. 



Iris diaphragm, 16. 



Isotropic, 64. 



Japanese filter or tissue paper, 12, 13, 26. 



Labels and catalogs, ink for, 79; prep- 

 aration of, 79. 



Labeling microscopical preparations, 77, 

 serial sections, 78. 



Laboratory compound microscope, 27. 



Lamp-light, 20. 



Lenses, combination of, 3 ; concave, 4 ; 

 condensing, 20; converging, 1, 3 ; 

 convex, 4 ; systems of, 3. 



Lens-system, 1 ; converging, 3. 



Letters in stairs, 30. 



Light with Abbe illuminator, 20 ; axial, 

 16 ; axial with Abbe illuminator, 20 ; 

 direct, 15 ; central, 16 ; incident, 15 ; 

 oblique, 16 ; oblique, experiments, 

 19 ; oblique with Abbe illuminator, 

 20 ; polarized, 63 ; reflected, inci- 

 dent or direct, 15 ; transmitted, 16 ; 

 wave length of, 58. 



Lighting, 15 ; for Abbe camera lucida, 

 51 ; artificial, 15 ; experiments, 17 ; 

 axial, experiments, 19; kind of light, 

 15 ; for micro-polariscope, 63 ; for 

 micro-spectroscope, 5S ; with a inir- 

 or, 17; 



Line spectrum, 54. 



Linen, examination of, 35. 



Liquid, currents in, 34 ; homogeneous, 

 25 ; immersion, 4. 



M 



Magnification, effect of adjusting object- 

 ive, 46 ; determination of, 38 ; ex- 

 pressed in diameters, 36 ; method of 

 binocular or double vision in obtain- 

 ing, 36-37 ; of microscope, 36 ; of 

 microscope with Abbe camera lucida, 



