Germ Plasm, x, 228, 229; immortality theory, 230; origin of energies, xvi, 145; theory of inheritance, x, 233-4, 235, xvi, 156 (see also Germinal Tissue) Germs, disease-producing, (see Disease Germs); in body, ix, 177; universal presence of, x, 193-4 Gestures, language of, xv, 146-52, 167-8 Geyserite, iii, 335 Geysers, iii, 128-9, xiii, 299; artificial, in Michigan, v, 92 Gharials, xii, 199, 201 Ghizeh, Pyramid of, xiv, 78, xv, 270; temples of, ii, 26 Ghor, of Syria, xiv, 120-1 Ghosts, as visual hallucinations, xi, 91 Giant and Dwarf Stars, ii, 153, 294, 309, 310, 382-4 Giant's Causeway, Ireland, xiv, 104; columnar structure, iii, 111, xiv, 129 Gibbons, xii, 381-2; reasoning power in, xv, 67; skeleton compared with man, 59 Gibbs, James E. A., v, 285 Gibbs, J. W., xvi, 136, xvi, 169 Gibraltar, apes of, xii, 378 Gibraltar, Strait of, depth, xiv, 299 Giddiness, sensation of, xi, 126 Giffard, Henri, v, 227 Giffard Injector, v, 140-2, 380 Gila Monster, xii, 204, 207 Gilbert, Dr. William, electrical work, vi, 11-12, xvi, 109, 111, 188 Gilbertus Anglicus, x, 41 Gills, of fishes, xii, 128, 135; functions and structure of, ix, 253, 254 Gills (plant), of mushrooms, xiii, 163 Ginkgo Tree, xiii, 315-16, 326 Ginseng, antiquity, xiii, 324-5; distribution, 351; origin, 255 Giraffes, xii, 320-1; trapping of, xv, 224 (fig.) Giralda Observatory, xvi, 100, ii, 38 Girls, education of, xi, 266-7 Givler, Prof. R. C., author "PSYCHOLOGY," Vol. xi Glacial Bowlders, iii, 70, 237, 352 (Pl. 20), xiv, 69, 70 Glacial Deposits, iii, 66-70, xiv, 59, 60; in U. S. and Canada, 170-1; lakes formed by, iii, 144-6, xiv, 200-2 Glacial Epoch, iii, 236-48; distribution of plants and animals, xiv, 375-7; drainage changes, 30, 52, 164, 170-1; fjords due to 259-61; lakes formed by, iii, 143-51, xiv, 200-2; topographical changes, 3, 30, 59-62, 158, 170 (see also Ice Age) Glacial Periods, theories of, i, 58, iii, 247-8 Glacial Plants (see Arctic Plants) Glacial Soil, xiv, 63, 69-70 Glacial Valleys, xiv, 56-8 Glacier National Park, cliff glaciers in, iii, 60; Swift Current Valley, Plate 5, p. 96; thrust faulting in, 90 Glaciers, iii, 59-62, xiv, 54-5; "autographs of," 56; cirques of, 58; cracks and fissures in, iii, 63; defined, 379; deposits of, 66-70, xiv, 59-60; erosion by, iii, 63-70, xiv, 55, 56, 57-8, 60-2, 233; falls formed by, iii, 48; flow, 62-3, 68, 240-1, iv, 165-6; lakes formed by, iii, 142-51; occurrence, xv, 72-3; topography produced by, xiv, 42-3, 44, 55-62; valleys cut by, iii, 64, 65, 66 (see also Plates 4, 5, and 6); valleys "overdeepened by," xiv, 259-60 Gland Cells, functions, ix, 39, 43, 59; number unchanging, 48 Glanders, germ of, x, 195; immunity to, 207