Equatorial Cloud-ring, 156. “Equatorial Doldrums,” 156. Error upon Error, 185. Exhilaration in ascending Mountains, 163. Eye and Brain seen through a Microscope, 41. Eye, interior, Exploration of, 236. Fall of Bodies, Rate of, 16. Falls, Height of, 16. Faraday, Genius and Character of, 193. Faraday’s Electrical Illustrations, 214. “Father of English Geology, the,” 126. Fertilisation of Clouds, 151. Fire, Perpetual, 117. Fire-balls and Shooting Stars, 89. Fire-Springs, Artesian, 118. Fishes, the most Ancient, 132. Flying Dragon, the, 130. Force neither created nor destroyed, 18. Force of Running Water, 114. Fossil Human Bones, 131. Fossil Meteoric Stones, none, 92. Fossil Rose, none, 142. Foucault’s Pendulum Experiments, 22. Franklin’s Electrical Kite, 213. Freezing Cavern in Russia, 115. Fresh Water in Mid-Ocean, 182. Galilean Telescope, the, 93. Galileo, What he first saw with the Telescope, 93. Galvani and Volta, 205. Galvanic Effects, Familiar, 203. Galvanic Waves on the same Wire, Non-interference of, 225. “Gauging the Heavens,” 58. Genius, Relics of, 5. Geology and Astronomy, Identity of, 104. Geology of England, 105. Geological Time, 143. George III., His patronage of Herschel, 95. Gilbert on Magnetic and Electric forces, 201. Glacial Theory, by Hopkins, 105. Glaciers, Antiquity of, 109. Glaciers, Phenomena of, Illustrated, 108. Glass, Benefits of, to Man, 92. Glass broken by Sand, 26. Glyptodon, the, 137. Gold, Lumps of, in Siberia, 124. Greenwich Observatory, Chronometers rated at, 229-232. Grotto del Cane, the, 112. Gulf-Stream and the Temperature of London, 115. Gunpowder-Magazines, Danger to, 216. Gymnotus and the Voltaic Battery, 206. Gyroscope, Foucault’s, 22. Hail and Storms, Protection against, 159. Hail-storm, Terrific, 160. Hair, Microscopical Examination of, 41. Harrison’s Prize Chronometers, 229-232. Heat and Evaporation, 188. Heat and Mechanical Power, 188. Heat by Friction, 189. Heat, Distinctions of, 187. Heat, Expenditure of, by the Sun, 186. 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 Calculate, 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.