Rosse, the Earl of, his “Telescope,” 96-99. Rotation-Magnetism discovered, 199. Rotation, the Axis of, 11. St. Paul’s Cathedral, how protected from Lightning, 167. Salt, All in the Sea, 179. Salt Lake of Utah, 113. Salt, Solvent Action of, 115. Saltness of the Sea, How to tell, 179. Sand in the Hour-glass, 20. Sand of the Sea and Desert, 106. Saturn’s Ring, Was it known to the Ancients?, 81. Schwabe, on Sun-Spots, 68. Science at Oxford and Cambridge, 1. Science of the Ancient World, 1. Science, Theoretical, Practical Results of, 4. Sciences, Plato’s Survey of, 2. Scientific Treatise, the Earliest English, 5. Scoresby, Dr., on the Rosse Telescope, 99. Scratches, Colours of, 36. Sea, Bottles and Currents at, 172. Sea, Bottom of, a burial-place, 177. Sea, Circulation of the, 170. Sea, Climates of the, 170. Sea, Deep, Life of the, 174. Sea, Greatest ascertained Depth of, 175. Sea, Solitude at, 172. Sea, Temperature of the, 170. Sea, Why is it Salt?, 177. Seas, Primeval, Depth of, 234. Sea-breezes and Land-breezes illustrated, 150. Sea-milk, What is it?, 176. Sea-routes, How shortened, 184. Sea-shells and Animalcules, Services of, 234. Sea-shells, Why found at Great Heights, 106. Sea-water, to imitate, 235. Sea-water, Properties of, 179. Serapis, Temple of, Successive Changes in, 111. Sheep, Geology of the, 138. Shells, Geometry of, 232. Shells, Hydraulic Theory of, 233. Siamese Twins, the, galvanised, 203. Skin, Dark Colour of the, 63. Smith, William, the Geologist, 126. Snow, Absence of in Siberia, 159. Snow, Impurity of, 158. Snow Phenomenon, 158. Snow, Warmth of, in Arctic Latitudes, 158. Snow-capped Volcano, the, 119. Snow-crystals observed by the Chinese, 159. Soap-bubble, Science of the, 48. Solar Heat, Extreme, 63. Solar System, Velocity of, 59. Sound, Figures produced by, 28. Sound in rarefied Air, 27. Sounding Sand, 27. Space, Infinite, 86. Speed, Varieties of, 17. Spheres, Music of the, 55. Spots on the Sun, 67. Star, Fixed, the nearest, 78. Stars’ Colour, Change in, 77. Star’s Light sixteen times that of the Sun, 79. Stars, Number of, 75. Stars seen by Daylight, 102. Stars that have disappeared, 76. Stars, Why created, 75. Stereoscope and Photograph, 47. Stereoscope simplified, 47. Storm, Impetus of, 164. Storms, Revolving, 164. Storms, to tell the Approach of, 163. Storm-glass, How to make, 164. Succession of life in Time, 128. Sun, Actinic Power of, 62. Sun and Fixed Stars’ Light compared, 64. Sun and Terrestrial Magnetism, 64. “Sun Darkened,” 64. Sun, Great Size of, on Horizon, 61. Sun, Heating Power of, 62. Sun, Lost Heat of, 103. Sun, Luminous Disc of, 60. Sun, Nature of the, 59, 238. Sun, Spots on, 67. Sun, Translatory Motion of, 61. Sun’s Distance by the Yard Measure, 66.