INDEX. 



243 



Cataract, Great, in India, 183. 

 Cat, Can it see in the Dark ? 51. 

 Caves of New Zealand and its Gi- 

 gantic Birds, 140. 

 Cave Tiger or Lion of Britain, 133. 

 Central Heat, Theory of, 116. 

 Chabert, "the Fire King," 192. 

 Chalk Formation, the, 108. 

 Changes on the Earth's Surface, 



142. 

 Chantrey, Heat-Experiments by, 



192. 



Children's powerful Battery, 204. 

 Chinese, the, and the Magnetic 



Needle, 194. 

 Chronometers, Marine, How rated 



at Greenwich Observatory, 229. 

 Climate, finest in the World, 149. 

 Climate, Variations of, 148. 

 Climates, Average, 149. 

 Clock, How to make Electric, 212. 

 Cloud-ring, the Equatoiial, 156. 

 Clouds, Fertilisation of, 151. 

 Coal, Torbane-Hill, 123. 

 Coal, What is it? 123. 

 Cold in Hudson's Bay, 160. 

 Colour of a Body, and its Magnetic 



Properties, 197. 



Colours and Tints, Chevreulou, 37. 

 Colours most frequently hit in 



Battle, 36. 



Comet, the, of Donati, 240, 241. 

 Comet, Great, of 1843, 84. 

 Comets, Magnitude of, 84. 

 Comets visible in Sunshine, 84. 

 Computation, Power of, 10. 

 Coney of Scripture, 137. 

 Conic Sections, 10. 

 Continent Outlines not fixed, 145. 

 Coi-pse, How soon it decays, 237. 

 " Cosmos, Science of the, ' 10. 

 Crosse, Andrew, his "Artificial 



Crystals and Minerals, 216-219. 

 Crosse Mite, the, 218. 

 Crystallisation, Reproductive, 26. 

 Crystallisation, Theory of, 24. 

 Crystallisation, Visible, 25. 

 Crystals, Immense, 24. 

 "Crystal Vault of Heaven," 55. 



DAVY, SIR HUMPHRY, obtains 



Heat from Ice, 390. 

 Davy's great Battery at the Eoyal 



Institution, 204. 

 Day, Length of, and Heat of the 



Earth, 186. 



Day's Length at the Poles, 65. 



Declination of the Needle, 197. 



Descartes' Labours in Physics, 9. 



Desert, Intense Heat and Cold of 

 the, 163. 



Dewdrop, Beauty of the, 157. 



Dew-fall in one year, 157. 



Dew graduated to supply Vegeta- 

 tion, 157. 



Diamond, Geological Age of, 122. 



Diamond Lenses for Microscopes, 

 40. 



" Diamond," Newton's Dog, 8. 



Dinornis elephantopus, the, 139, 



Dinotherium, or Terrible Beast, 



the, 136. 

 Diorama, Illusion of the, 37. 



EARTH and Man compared, 22. 



Earth, Figure of the, 21. 



Earth, Mass and Density of, 21. 



Earth's Annual Motion, 12. 



Earth's Magnitude, to ascertain, 

 21. 



Earth's Surface, Mean Tempera- 

 ture of, 23. 



Earth's Temperature, Interior, 116. 



Earth's Temperature Stationary, 

 23. 



Earth, the, a Magnet, 197. 



Earthquake, the Great Lisbon, 

 121. 



Earthquakes and the Moon, 121. 



Earthquakes, Eumblings of, 120. 



Earthquake-Shock, How to mea- 

 sure, 120. 



Earth-Waves, 119. 



Eclipses, Cause of, 74. 



Egypt, Alluvial Land of, 110. 



Electric Girdle for the Earth, 224. 



Electric Incandescence of Charcoal 

 Points, 204. 



Electric Knowledge, Germs of, 

 207. 



Electric Light, Velocity of, 209. 



Electric Messages, Time lost in, 

 225. 



Electric Paper, 209. 



Electric Spark, Duration of, 209. 



Electric Telegraph, Anticipations 

 of the, 220-224. 



Electric Telegraph, Consumption 

 of, 224. 



Electric Telegraph in Astronomy 

 and Longitude, 225. 



