Harbors, xiv, 266-71; necessity of, to modern ships, 265; photographic mapping of, i, 47-8 Hard Coal, combustion process, viii, 45; flames from, 57; origin, xiii, 10 (see Anthracite Coal) Hardening of Arteries, x, 334-6, 340 Hardening Processes, (health), x, 240 Hardness, defined, viii, 377; scale of, iii, 320, viii, 202; sensation of, xi, 128 "Hard Shell," xii, 83 Hard Water, cause, iii, 126, viii, 151, 322-3, 377; effects of, 143, 151-2, 323; effects, xiv, 147; occurrence in nature, ii, 147; softening of, viii, 323-4; taste of, 40 Hares, xii, 286-8 Hargreaves, spinning jenny, v, 273, 376, xv, 246 Harmattan, i, 134, 374 Harmonica, iv, 235 Harmonics, iv, 213 Harmony, due to tonal fusion, xi, 106 Harney's Peak, xiv, 227 Harpoons, xv, 209 (fig.), 210-12 Harps, development of, xv, 318 Harpsichord, xv, 318 Harrisburg, Pa., topography near, iii, 36 Harrison, John and William, v, 66-7 Hartness, telescope of, ii, 101 Harun-al-Raschid, astronomy under, ii, 37 Harvard Classification of Stars, ii, 116-18, 146, 310 Harvard College, first eclipse expedition by, ii, 211 Harvard Football Team (1913), excitement effects, xi, 138 Harvard Observatory, Arequipa station, ii, 145-6, 148; photographic work, 116, 118, 127, 130, 136, 137, 301-2; star spectra studies, 307 Harvard Photometry, ii, 297 Harvesting Machines, ancient, v, 240; modern, 244-9 Harvestmen (scorpions), xii, 90 Harvest Moon, ii, 196 Harvey, William, x, 61-2, 66-7, 97; discovery of circulation of blood, ix, 192, x, 22, 61, 63-6, 69, 81, xvi, 106-7, 142; other work, 107, 111 Hashish, xiii, 239 Hate, emotion of, xi, 139; motor character, 58; sentiment of, 148-9 Hats, hygiene of, x, 240, 309; renovation by electricity, iv, 10 Havana, harbor of, xiv, 268; sanitary measures, i, 327, x, 162; water supply, xiv, 140 Havemeyer, Dr. L., author ANTHROPOLOGY, Vol. xv Havre, port of, xiv, 271 Hawaii, geological formation, xiv, 101; paper in sugar-growing, v, 291; radio station, vii, 281; screw pine of, xiii, 354 Hawaiian Islands, lava formations, iii, 28, 103; oceanic character, xiv, 276; rainfall on Mt. Waialeale, i, 112; trade wind effects, xiv, 356; volcanic soils, 329; volcanoes, iii, 103-5, xiv, 322-3 Hawaiian Music, xv, 315 Hawk Moths, xii, 119-20; facets of, 102 Hawks, xii, 260, 261; man's lesson from, xv, 206 Hawksbee, Francis, xvi, 122-3 Hay Fever, cause of, x, 212, xiii, 118 Haze, atmospheric, i, 374; dry fog, 96; dust (African coast), 55; from smoke, 56, 57; in distance perception, xi, 182 Hazel Copses, xiii, 370 Hazelnut Tree, xiii, 193