Galaxy, ii, 350-6; as basis of star distribution, 350, 353, 354, 364-5; globular clusters and the, 339, 343; nebulæ and the, 363, 364-5; solar system and, 353-4; spectra of stars, 116; star streams and, 346; studies at Mt. Wilson, 158-9, 160; type of stars, 122; variable stars and, 327, 328, 330, 332 Galen, x, 28-31; anatomical ideas disputed by Vesalius, 51, 52, 53; arterial bleeding unknown to, 39; authority in Middle Ages, 32, 34, 36, 37, 39, 41, 43, 51, 52; classification of minds, xi, 152-3, 155; classifying tendency of, x, 83; Locke, on, 75; medical works, xvi, 98; on circulation of blood, x, 22, 62-3, 65-6; on convulsions, fainting, etc., 89; on occupational diseases, 244; Paracelsus on, 47, 48; revival of writings, 44, 45 Galena, iii, 330, 362, 363, 368 Galilee, Sea of, formation, iii, 156; level, xiv, 121 Galileo, astronomical work, ii, 14, 53-6, iv, 27-8; astronomical and other work, xvi, 103; discoveries, ii, 83, 94, 96, 262; falling bodies demonstration at Pisa, iv, 28, 97, 101; medical advances due to, x, 67; motion studies of, iv, 19, 28, 35, 61; on Galaxy, ii, 351; on Gilbert, xvi, 109; on laws of motion, ii, 63; on Mars, 227; pendulum discovery, v, 63-5; pendulum clocks suggested, 65; studies of nebulæ, ii, 357; telescopes, 12, 94, 95; thermometer invention, i, 68, 69, x, 71; Torricelli pupil of, iv, 114 Gall Bladder, inflammations of, x, 220, 224 Galley Worms, xii, 88-9 Gallium, discovery of, viii, 180; symbol and atomic weight, 383 Gallon, cubic inches in, iv, 46 Galls, on plants, xii, 125; on roots, xiii, 98 Gall Stones, ix, 276 Galton, Sir Francis, eugenic work, xvi, 157; on ancestral heredity, x, 231; on fatigue, xi, 275; on sun's corona, ii, 222; statistical methods, xvi, 153 Galvani, electrical work, vi, 16-17; electrical work, xvi, 122, 189 Galvanic Batteries, vii, 369 Galvanic Cells, vii, 236, 241-2 Galvanic Currents, vii, 242, 244, 248 Galvanism, discovery, xvi, 122 Galvanized Iron, vii, 318-19, viii, 155-6, 273 Galvanometers, iv, 279, vii, 179, 369; invention, vi, 23, 24 Galveston, harbor of, xiv, 269; hurricanes, i, 136; hurricane of 1900 and rebuilding, xiv, 302-3 Game Birds, xii, 261-3 Games, athletic, advantages from, x, 304 Gamma Rays, i, 143, viii, 185 Gamopetalae, xiii, 47, 190, 201-5 Ganges River, crocodiles of, xii, 201; delta, iii, 32, xiv, 53; erosion by, iii, 31; furrow of, xiv, 287 Ganglia, of nerves, xi, 26 Gangue Minerals, viii, 199; handling of, 269, 270 Gannets, xii, 253 Ganoids, iii, 283 (fig.), 284, xii, 152-3 Ganoid Scales, xii, 134 Garbage, as fertilizer, xv, 280, 343, 344; disposal of, 330, 346 Garda, Lake, formation, iii, 146; in rift valley, xiv, 123