Agassiz, Discoveries of, 127. Air, Weight of, 14. All the World in Motion, 11. Alluvial Land of Egypt, 110. Ancient World, Science of the, 1. Animals in Geological Times, 128. Anticipations of the Electric Telegraph, 220-224. Arago on Protection from Storms, 159. Arctic Climate, Phenomena of, 162. Arctic Explorations, Rae’s, 162. Arctic Regions, Scenery and Life of, 180. Arctic Temperature, 161. Armagh Observatory Level, Change of, 144. Artesian Fire-Springs, 118. Artesian Well of Grenelle, 114. Astronomer, Peasant, 101. Astronomer’s Dream verified, 88. Astronomers, Triad of Contemporary, 100. Astronomical Observations, Nicety of, 102. Astronomy and Dates on Monuments, 55. Astronomy and Geology, Identity of, 104. Astronomy, Great Truths of, 54. Atheism, Folly of, 3. Atlantic, Basin of the, 171. Atlantic, Gales of the, 171. Atlantic Telegraph, the, 226-228. Atmosphere, Colours of the, 147. Atmosphere compared to a Steam-engine, 152. Atmosphere, Height of, 147. Atmosphere, the, 146. Atmosphere, the purest, 150. Atmosphere, Universality of the, 147. Atmosphere weighed by Pascal, 148. Atoms of Elementary Bodies, 13. Atoms, the World of, 13. Aurora Borealis, Halley’s hypothesis of, 198. Aurora Borealis, Splendour of the, 165. Australian Cavern, Inmates of, 137. Australian Pouch-Lion, 137. Axis of Rotation, the, 11. Barometer, Gigantic, 151. Barometric Measurement, 151. Batteries, Minute and Vast, 204. Birds, Gigantic, of New Zealand, Extinct, 139. “Black Waters, the,” 182. Bodies, Bright, the Smallest, 31. Bodies, Compression of, 12. Bodies, Fall of, 16. Bottles and Currents at Sea, 172. Boulders, How transported to Great Heights, 105. Boyle on Colours, 49. Boyle, Researches of, 6. Brain, Impressions transmitted to, 235. Buckland, Dr., his Geological Labours, 127. Building-Stone, Wear of, 108. Burnet’s Theory of the Earth, 125. Bust, Magic, 36. Candle-flame, Nature of, 237. Canton’s Artificial Magnets, 196. Carnivora of Britain, Extinct, 132. Carnivores, Monster, of France, 138. Cataract, Great, in India, 183. Cat, Can it see in the Dark?, 51. Caves of New Zealand and its Gigantic 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 Equatorial, 156. Clouds, Fertilisation of, 151. Coal, Torbane-Hill, 123. Coal, What is it?, 123. Cold in Hudson’s Bay, 160.