Gold, atomic weight and symbol, viii, 383; California mines, iii, 226, 365; chemical inactivity, viii, 127-8, 163, 174; contraction on solidifying, iv, 150; density of, 113; electrolytic refinement, vii, 301, 320; extraction methods, viii, 131, 141, 170, 174, 269, 270; fusibility, 384; in sea water, 197, xiv, 295; melting point, iv, 162; metallurgy, development of, xvi, 176; occurrence, iii, 330-1, 365-7, viii, 131, 198; "parting" of silver from, 272; positiveness, vi, 59; production, iii, 365; profitable ores, viii, 197; properties, 126-7, 174, iii, 330-1; recovered in copper refining, vii, 319, 320; specific gravity, viii, 384 Golden Age, x, 18, 20; of Greek science, xvi, 86-96 Golden Gate, formation, xiv, 258; furrow of, 287 Goldenrod, bracts, xiii, 43; stems, 23; in the pampas, 376 Golden Showers, i, 61 Goldfish, family of, xii, 161; in liquid air, i, 32 Gold Leaf, color between glasses, iv, 324 Gold Mining, dredges in, v, 256-7; water jets in, 88 Gold-Plating, of aluminum, vii, 319 Goldschmidt Generators, vii, 274 Goldschmidt Method, of welding, viii, 155 Golf, as exercise, x, 317; report of match, xi, 161 Goodwin, Rev. Hannibal, v, 330 Goodyear, Charles, xiii, 245 Goose Barnacle, xii, 84-5 Gooseberry, origin, xiii, 225 Goose-Flesh, ix, 161, xi, 112-13, 123 Gophers, xii, 290, 294; badgers and, 348 Gopher Snake, xii, 219 Gopher Turtle, xii, 191 Gorals, xii, 325 Gordius (hairworm), xii, 45 Gorgas, William C., yellow fever work, x, 162, 172 Gorges, formation of, xiv, 50-1, 51-2; in old and new areas, iii, 33, 34; of New York and New England, 44, 242-3 Gorham, Marquis L., v, 248, 381 Gorillas, xii, 382 (fig.), 383-4; brain weight of, xv, 62; physical comparison with man, 57-8; family groups among, 276, 360-1; use of stones and clubs, v, 9 Gorner Grat, boiling temperature at, iv, 170 Gouffre, i, 196, 373 Gourd Seed, growth of, x, 229 Gout, uric acid and, x, 343 Government, beginnings of, xv, 360-74, 379-80; cultivation and, 380 Grackle, coloring of, xii, 245 Gradients, meteorological, i, 373 (see Barometric, Potential Gradients) Graduated Flask, viii, 294, 295 Graham Flour, ix, 34 Graham's Law, viii, 108-9 Grain Cradles, v, 240-1 "Grain of the country", xiv, 99; in river classification, 153 Grains, fruit of grasses, xiii, 56, 182; milling of, xv, 237-9; proteins in, ix, 34; "showers", i, 357; storing of, viii, 371 Gram, unit of force, iv, 70; unit of mass, iv, 46, 69, viii, 28; value in pounds and poundals, iv, 70 Gram-Molecular Volume, viii, 109 Gramophone, v, 328-9, 382 Grampuses, xii, 297 Grand Banks, dogfish of, xii, 146; petrels of, 252; scallop fisheries of, 65