INDEX 
293 
Deposits, IV, 94, 95. 
Development, 260, 267. 
Dew, 97. 
Dodo, 79. 
Doldrum belt. 111. 
Dragon fly (see Insects), IV, 
52. 
Drift, IV, 112. 
Ducks, kinds, IV, 60. 
Ear (see Sound), III, 129. 
Earth, 187,192. 
Earth-book, IV, 76. 
Earth, molten, 19. 
Earthworm, I, 84; II, 147. 
Ecliptic, 182, 189. 
Eggs, IV, 70. 
Electricity, 187, 191, 196, 200. 
Elements, IV, 264. 
Environment, 239, 249, 276, 284. 
Equator, celestial, 141. 
Equinox, vernal, 168. 
Erosion, 79, 88, 91, 94, 102. 
Eskimo, dog, IV, 230; family, IV, 
234. 
Ether, III, 153. 
Evolution, 265, 278. 
Eye, III, 174. 
Faculae, 176. 
Families, 234. 
Farm, II, 47. 
Fault, 19. 
Fishes, 42, 43; II, 114, 118; IV, 
132, 138. 
Flowers, kinds, II, 27; III, 31 (il- 
lus.); IV, 33; 11, 113, 128, 138; 
fertilization of, 269. 
Focus, III, 179. 
Fog, 99. 
Food (see Variation by Food), on 
tadpoles, 235. 
20 
Force, universal, 197; falling bod¬ 
ies, 201 ; upon individuals, 278. 
Forest, 111, 27. 
Fossils, 35, 44, 67, 75, 77. 
Fowls, kinds, II, 71, 75. 
Frogs, IV, 42. 
Frost, I, 59 ; IV, 103 ; 97. 
Fruit, kinds, I, 34, 47 ; II, 139. 
Furs, IV, 232. 
Galapagos islands, 246. 
Gemmation, 206. 
Genus, 233. 
Geological forms, early, 281. 
Geysers, 116. 
Giraffe, 156. 
Glaciers, 80, 83, 103, 107,112; IV, 
236. 
Glyptodon, 78. 
Granite, II, 78. 
Graptolites, 37. 
Grasses, II, 60. 
Grasshoppers, 245, 246 (see In¬ 
sects). 
Gravitation, 197; falling bodies, 
200, 203; gravity, 198; speciflc, 
II, 93. 
Gray hare, 271. 
Greenland, IV, 233. 
Gregarina, 219. 
Growth, of plants and animals, 237 ; 
of stems, IV, 6. 
Gulf Stream, IV, 125. 
Gypsum beds, 35. 
Hare, gray, 273. 
Heart, IV, 29. 
Heat, modes of transmission. III, 
134,142; 150; effect of, IV, 115, 
119. 
Hercules, 156. 
Herculis, 148. 
