INDEX TO VOL. I, 



1213 



Eyes of fishes, 49. 



FISHES, eyes of, 49. 



Fluorescence, 78. 



Focal point, 43. 



Focus, 43. 



Fraunhoffer's lines, 55, ft rrg. 



GALILEAN telescope, the, 72. 



Gas-bags, 62. 



Gas-holders, 63. 



Cases, preparation of, for the lime-light, 



61, 62, 63. 



Glass, multiplying, the, 60. 

 Glasses, burning, 76, 

 Glasses, magnifying, 76. 

 Gregorian telescope, the, 74. 



HEALTH, influence of light on, 58. 

 Herschel's telescope, 74. 

 Hydrogen gas, to prepare, 62. 



ICELAND spar, refractive power of, 79. 

 Incidence, angle of, 42, et aeq. 

 Index of refraction, 46. 

 Instruments, optical, 59, 

 Interference of light, 52. 

 Interference of sound, 52. 

 Iris, the, of the eye, 48. 



KALEIDOSCOPE, the, 77. 

 Kalotrope, the, 77. 



LANTERNS for dissolving views, 8cc., 

 61, et sey. 



Length of waves of light, 41. 



1 ens, the Coddington, 65. 



Lens, the Stanhope, 65. 



Lenses, 46. 



Lenses, achromatic, 53, 54. 



Lenses, focus of, 47. 



Lenses, magnifying power of, 47. 



Lenses, to cleanse, 63, 



Light, 41. 



Light a radial force, 42. 



Light, absorption of, 42. 



Light, apparatus for the lime, and oxy- 

 calcium, 61, 62. 



Light, artificial (see "Artificial Illumi- 

 nation"), 86. 



Light, colours of white, 41, 49. 



Light, decomposition of, 41. 



Light, diffraction of, 52. 



Light, dispersion of, 53. 



Light, double refraction of, 79. 



Light, effects of, on organised bodies, 

 56, et ley. 



Light, intensity of, 42. 



Light, interference of, 52. 



Light, length of the waves of, 41. 



Light, lime, 62. 



Light, mono-chromatic, 54. 



Lignt of the sun, 43, 168. 



Light, oxy-calcium, 62. 



Light, oxy-hydrogen, 62. 



Light, polarisation of, 80 



Light, polarised, 80. 



Light, reflection of, 42. 



Light, refraction of, 45. 



Light, speed of, 42, 51, 168. 



Light, vital action of, 58. 



Lime-light, 62. 



Lime-light (See, also, Index to " Arti- 

 ficial Illumination"). 



Lines, Fraunhoffer's, 55, et teg. 



Luminous rays, 49 57. 



MAOIC-LANTBRN, the, 61. 



Magnetism, relation of, to light, 85. 



Magnifying-glagses, 76. 



Management of magic-lanterns, &c., 63. 



Meniscus, the (See Lenses). 



Mica, colour of, by polarised light, 81. 



MUM, optic axis of, 84. 



Microscope, lenses for, 65. 



Microscope, the oxy-hydrogen, 67. 

 Microscope, the Coddington, 65. 

 Microscope, the single, 65. 

 Microscope, the solar, 69. 

 Microscope, the Stanhope, 65. 

 Microscopes, 64. 

 Microscopes, achromatic, 65. 

 Microscopes, componnd, <55. 

 Microscopes, management of compound, 



66. 



Microscopic photographs, 68. 

 Milk and polarised light, 85. 

 Minors, 42, 43, et seg. 

 Mirrors, concave, 74. 

 Mirrors, coirvex, 74. 

 Mirrors, curved, 43, ft leg., 71. 

 Mirrors, plane, 42. 

 Mono-chromatic light, 5 4. 

 Multiplying-glass, the, 60. 



NEGATIVE axes, 79. 

 Newtonian telescope, the, 75. 

 Newton's rings, 51. 

 Nicol's prism, 83, 84. 

 Nitre, optic axis of, 79, 84. 



OBJECT-CLASS, 65, 72. 



Objects for the microscope, 66, 68, 69. 



Objects, to mount, 66, 68, 69. 



Occular defects with respect to colour, 59. 



Oil of turpentine, and polarised light, 85. 



Opacity, 42. 



Optic axes of double refracting bodies, 79. 



Optic axis of mica, 84. 



Optic axis of nitre, 84. 



Optical instruments, 59, etteg. (See name 



of each also). 



Optical instruments, miscellaneous, 74. 

 Optic nerve, 48. 

 Optics, 41. 

 Ordinary ray, 79. 

 Organised bodies, effects of light on, 



56, et teg. 



Oxy. calcium light, 62. 

 Oxygen gas, to prepare, 61 . 

 Oxy-hydrogen blow-| ipe, 62. 

 Oxy-hydrogen light, 62 (See, also, Index 



to "Artificial Illumination"). 

 Oxy-hydrogen microscope, 67. 



PARABOLIC reflector, 45, 



I'hantasmascope, 77. 



Phosphorescence, 78. 



Photographs for the microscope, 68. 



Photography (see separate Index), 149. 



Physioscope, the, 64. 



Plane polarisation, 80. 



P>ane reflection, 42. 



Plano-concave lenses (See Lenses). 



Plano-convex lenses (See Lenses). 



Plants, influence of light on the growth 



of, 56. 



Plate, polarising, 80. 

 Plates of air, colours of thin, 51. 

 Polarisation, angle of, 80. 

 Polarisation, circular, 84. 

 Polarisation, left-handed, 85. 

 Polarisation, plane, 80. 

 Polarisation, right-handed, 85. 

 Polariscope, Bestall's, 81. 

 Polariscopes, 81. 



Polarised light, phenomena of, 82, et leg. 

 Positive axes, 79. 

 Power of telescopes, 72. 

 Primary colours, 41, 49. 

 Prism, the, 41, 49. 

 Prism, made of various materials, 49. 

 Prismatic spectrum, 41. 

 I'i u-Mate of potass, colours of, 8). 

 Pupil, the, of the eye, 48. 



RADIAL forces, 42. 

 Rainbow, cause of the, 50. 

 Rainbow, colours of, 50. 

 Ray, extraordinary, 7U. 



Ray, ordinary, 79. 

 Ray, polarised, 80. 

 Rays, actinic, 57. 

 Rays, calorific, 49, 57. 

 Rays, chemical, 49, 50, 57. 

 Rays, luminous, 49 57. 

 Reflecting telescopes, 73. 

 Reflection, angle ef, 42, et , 

 Reflection, curved, 43. 

 Reflection, laws of, 42, 

 Reflection of light, 42. 

 Reflection, plane, 42. 

 Reflector, elliptic, 45. 

 Reflector, parabolic, 45. 

 Reflector, spherical, 44. 

 Refraction, atmospheric, 45. 

 Refraction, double, 79. 

 Refraction, double, cause of, 79. 

 Refraction, index of, 46. 

 Refraction of light, 45. 

 Refraction, table of indices of, 46. 

 Refractive power of bodies varies, 46. 

 Rock-crystal and polarised light, 84. 

 Rose's kalotrope, 77. 

 Rosse's, Lord, telescope, 74. 



SCLEROTICA, the, 48. 



Screens for magic-lanterns, &c., 63. 



Selenite, colour of, under polarised light, 



83. 



Short-sightedness, 49. 

 Sight, defective, 49. 

 Sight, organ of, 48. 

 Single refraction, 45. 

 Skin, effects of light on the human, 58. 

 Soap-bubble, colours of the, 5 1 . 

 Solar and artificial light, 54, 163. 

 Solar tight, 43, 168. 

 Solar microscope, the, 69. 

 Spectacles, 75. 



Sjn vtrum analysis, 55, 166, et teg. 

 Spectrum, prismatic, 41, 49. 

 Speculum for telescopes, 73. 

 Speed of light, 41, 51, 168. 

 Spherical aberration, 44. 

 Spherical reflectors, 44. 

 Squinting, 49. 

 Stanhope lens, the, 65. 

 Sugar and polarised light, 85. 



TELESCOPE, astronomical, 73. 



Telescope, Galilean, 72. 



Telescope, Gregorian, 74. 



Telescope, Herschel's, 74. 



Telescope, Lord Rosse's, 74. 



Telescope, simple, 72. 



Telescope, the Cassegranian , 74, 



Telescope, the Newtonian, 74. 



Telescopes, 71. 



Telescopes, achromatic, 72, 73. 



Telescopes, lenses of, 72. 



Telescopes, ordinary, 73. 



Telescopes, power of, 72. 



Telescopes, reflecting, 73. 



Telescopes, refracting, 72. 



Telescopes, speculum of, 73. 



Thanmatrope, the, 77. 



Thin plates of air, colours of, 51. 



Tourmaline, polarising properties of the, 



83. 



Translucency, 42. 

 Transparency, 42. 



UNANNEALED glass, effects of polarised 



light on, 84. 



Undulations, length of, 41, 51. 

 Undulations, number of, 41, 51. 

 Uniaxial bodies, 79. 



VELOCITY of light, 42, 51, 163. 

 Views, dissolving, 63, et teg. 

 Vital action of light, 58. 



WAVES of light, length, &c., of, 41. 51. 

 White light, decomposition of, 41, 51. 



