INDEX. 



245 



Heat from Gas-lighting, 189. 



Heat from Wood and Ice, 190. 



Heat, Intense, Protection from, 

 191, 192. 



Heat, Latent, 187. 



Heat of Mines, 188. 



Heat, Nice Measurement of, 186. 



Heat, Origin of, in our System, 87. 



Heat passing through Glass, 189. 



Heat, Repulsion by, 191. 



Heated Metals, Vibration of, 188. 



Heavy Persons, Lifting, 17. 



Heights and Distances, to Calcu- 

 late, 19. 



Herschel's Telescopes at Slough, 

 95. 



Highton's Minute Battery, 204. 



Hippopotamus of Britain, 135. 



" Horse Latitudes, the," 173. 



Horse, Three-hoofed, 138. 



Hour-glass, Sand in the, 20. 



ICE, Heat from, 190. 

 Ice, Warming with, 190. 

 Icebergs of the Polar Seas, 180. 

 Iguanodon, Food of the, 129. 

 Improvement, Perpetuity of, 5. 

 Inertia Illustrated, 14. 



JERUSALEM, Temple of, How pro- 

 tected from Lightning, 167. 



Jew's Harp, Theory of the, 29. 



Jupiter's Satellites, Discovery of, 

 80. 



KALEIDOSCOPE, Sir David Brew- 



ster's, 43. 

 Kaleidoscope, the, thought to be 



anticipated, 43. 

 Kircher's " Magnetism," 194. 



LEANING TOWER, Stability of, 15. 



Level, Curious Change of, 144. 



Leyden Jar, Origin of the, 216. 



Lifting Heavy Persons, 17. 



Light, Action of, on Muscular Fi- 

 bres, 34. 



Light, Apparatus for Measuring, 

 32. 



Light from Buttons, 36. 



Light, Effect of, on the Magnet, 198. 



Light from Fungus, 36. 



Light from the Juice of a Plant, 35. 



Light, Importance of, 34. 



Light, Minuteness of, 34. 



Light Nights, 35. 



Light, Polarisation of, 33. 



Light, Solar and Artificial Com- 

 pared, 29. 



Light, Source of, 29. 



Light, Undulatory Scale of, 30. 



Light, Velocity of, 31. 



Light, Velocity of, Measured by 

 Fizeau, 32. 



Light from Quartz, 51. 



Lightning-Conductor, Ancient,167. 



Lightning-Conductors, Service of, 

 166. 



Lightning Experiment, Fatal, 214. 



Lightning, Photographic Effects 

 of, 45. 



Lightning produced by Rain, 166. 



Lightning, Sheet, What is it? 

 165. 



Lightning, Varieties of, 165. 



Lightning, Various Effects of, 168. 



Log, Invention of the, 173. 



London Monument used as an Ob- 

 servatory, 103. 



" MAESTRICHT Saurian Fossil," the, 



141. 



Magnet, Power of a, 195. 

 Magnets, Artificial, How made, 



195. 



Magnetic Clock and Watch, 211. 

 Magnetic Electricity discovered, 



199. 



Magnetic Hypotheses, 193. 

 Magnetic Needle and the Chinese, 



J94. 

 Magnetic Poles, North and South, 



201. 



Magnetic Storms, 202. 

 "Magnetism," Kircher's, 194. 

 Malachite, How formed, 124. 

 Mammalia in Secondary Rocks, 



130. 



Mammoth of the British Isles, 133. 

 Mammoth, Remains of the, 134. 

 Mars, the Planet, Is it inhabited ? 



82. 

 Mastodon coexistent with Man, 



135. 



Matter, Divisibility of, 14. 

 Maury's Physical Geography of the 



Sea, 170. 



Mediterranean, Depth of, 176. 

 Megatherium, Habits of the, 135. 

 Mercury, the Planet, Temperature 



of, 82. 

 Mer de Glace, Flow of the, 110. 



