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INDEX. 27: Lantern, Biunial, 8. Lantern enlarging, 239. Lantern enlargements, 209. Lantern for experiments, 190. Lantern, How to work, 76. Lantern legs, 256. Lantern microscope, 240. Lantern, Mineral Oil, 7. Lantern, Opaque, 244. Lantern-slides, 97. Lantern-slide colouring, 145. Lantern - slides from paper prints, 121. Lantern slides on dry plates, 109. Lantern-slides on ground glass, 99. Lantern-slides on wet plates, 104. Lantern-slides with transferro- type paper, 143. Lantern, Triunial, 15. Lecture-lamp, 270. Lenses, Condensing, 21, 23. Lenses, Objective, 26, 27. Lens, Supplementary, 22. Limes, 71. Lime-shield, 57. Limes, Preserving, 74. MAGNETIC experiments, 201. Making emulsion, 128. Making oxygen, 30. Masks, Cutting, 142. Micro, Attachment, 220, 242. Microscope, Camera for, 215. Microscope, Lantern, 240. Mineral oil lantern, 7. Mixed jet, 53. Mixture, Oxygen, 40. Moonlight pictures, 159. Mounting, 141. NEWTON'S Lamp, 6. OAKLEY'S regulator, 64. Objective lenses, 26, 27. Opaque lantern, 244. Opaque lantern, principle of, 2. Optical system, 16. Oxycalcium jet, 50. Oxygen, Erin's method, 46. Oxygen, Compressed, 48. Oxygen-ether light, 83. Oxygen making, 30. Oxygen mixture, 40. Oxygen retort, 32. PAINTING with aniline colours, 161. Photographs, Enlarging, 222. Photo-micrographs, 211. Portable frame, 93. Practical hints, 264. Preserving limes, 74. Pressure boards, 60. Primitive lime-light, 51. Printing clouds, 233. Prism, The, 182. Pure hydrogen, Advantage of, 69. Purifier, or Wash-bottle, 37. BACK, Washing, 136. Regulator, Oakley's, 64. Ketort, Oxygen, 32. T