294 
HAROLD’S DISCUSSIONS. 
Heredity, 226, 276. 
Horizons, 140. 
Horse, II, 64. 
Horse latitude. 111. 
Hudson Bay, IV, 232. 
Huronian, 16. 
Hurricanes, 134. 
Hyades, 147. 
Hydra, IV, 148. 
Hydrogen, IV, 257. 
Hygrometer, 95. 
Icebergs, IV, 242; formation of, 
82. 
Imitation, for protection, 273; II, 
8 ; IV, 47, 48, 214. 
Inheritance, of physical features, 
227; of ameba, 230; of moral 
traits, 227. 
Insects, kinds. III, 2, 14, 23; IV, 
52, 55; II, 10, 13, 19, 21, 23, 
24. 
Iron, 15, 18, 58, 59. 
Jack-in-the-pulpit, 269, 270. 
Jelly-fish, IV, 151. 
Jetties, IV, 124. 
Jupiter, 183. 
Kangaroo, 259. 
Lake-dwellers’ houses, IV, 222. 
Lamarckian theory, 260. 
Lamp, miner’s, 51. 
Land breezes, 123. 
Laplace, Pierre Simon, 23. 
Laurentian, 16. 
Leaves, cause of falling, I, 29; (see 
Plants), IV, 22; epidermis, IV, 
23. 
Lens (see Light), III, 164. 
Leo, 165. 
Lepidodendron, 55. 
Libra, 166. 
Life, record, IV, 120; imitation in 
struggle for, 273 ; lowest forms 
of, 281; advances of, 285. 
Light, III, 153, 169, 173. 
Lights, two great, 169. 
Lignite, brown, 55. 
Lilac, II, 125. 
Lily, IV, 3; Amazon, IV, 215. 
Lime-kiln, IV, 100. 
Limestone series, 15 ; formation of, 
35. 
Lingula, 36. 
Lizard, IV, 197,277. 
Longitude, celestial, 169. 
Lungs, IV, 26 ; cells, IV, 27 ; primi¬ 
tive, 262. 
Lynx, 156. 
Lyra, 157. 
Magnetism, I, 61; III, 198; 184. 
Mahogany, IV, 167. 
Mammals, age of, 73. 
Man, Miocene evidences of, 84; 
food of early, 87; higher life 
and, 286. 
Manatee, IV, 131. 
Mango-tree, IV, 175. 
Mangrove-tree, IV, 165. 
March, II, 120. 
Mariner’s compass. III, 186. 
Mars, 187. 
Mastodon, 77. 
Matter, properties. III, 116 ; atoms, 
molecules. III, 117. 
Meadow, II, 126. 
Megasaur, 67. 
Megathere, 77. 
Mercury, 183. 
Meridian, 140. 
Metals, 1, 62. 
