Base Level of Erosion, defined, iii, 30, 377, xiv, 40; form of rivers at, 49; of waves, 254 Base Plugs, vi, 276-7, vii, 72 Basic Metabolism, ix, 37, 78, x, 271; daily amount in calories, ix, 296, x, 271; disease effects on, ix, 302-4, x, 272; heat production by, ix, 307; of obese persons, x, 274; protein stimulation of, ix, 301-2; protoplasmic wastage by, 282-3; temperature and water effects, 37-8 Basilar Membrane, of ear, iv, 203 Basin Ranges, formation of, xiv, 117 Basins, ocean, xiv, 286 Basket Fish, xii, 49 Baskets, Indian, xv, 248 Basques, isolation of, xv, 130 Bathrooms, lighting of, vii, 71-2 Baths, Bathing, ix, 313, 321-2, x, 311-12; need of, after exercise, x, 304; therapeutic uses, 311, 383; warm for insomnia, xi, 289-90 (see also Cold Baths, Hot Baths) Bats, xii, 369-72; in oceanic islands, xiv, 277 Batteries, electric (see Electric Batteries) Battles, crowd psychology in, xi, 326-7; rain from, i, 336-8 Battleships, electrical applications (U. S. N.), vii, 325-35; gun-training on, v, 104; importance, vii, 325-6; radio directing of, 284; wireless telephony and, 281-3 Bauxite, iii, 369; in basic refractories, vii, 307 Bayberry Bush, xiii, 191, 341 Bayliss, hormones discovery, x, 320; secretin discovery, 325; quoted, xi, 198-9 Bays, in irregular coasts, xiv, 252; of ria coasts, 257 Beach, Alfred E., v, 138 Beach, Prof. Robin, author Electricity, Vols. vi, vii Beaches, amphipods of, xii, 85; features of, xiv, 246; formation of, iii, 58, 81; plants of, xiii, 381-2; raised, iii, 81, xiv, 209; rapid development of, iii, 58 Beach Fleas, xii, 81-5 Beach Walls, xiv, 246 Beachworms, xii, 54 Beaded Lightning, i, 149 "Beagle," voyage of, x, 134-5, xiv, 142 Beam Balance, iv, 101-2 Beam Warpers, v, 280 Beans, as food, viii, 365, ix, 34, 36, 299, x, 262-79; food-obtaining devices, xiii, 97; leaves, 36-7, 113; movement of tendrils, 111; in pea family, 198; origin, 222; petals, 47; seeds, 56; seed-leaves, 176 Beards, as race character, xv, 38 Bears, xii, 336-8; canine teeth in, 333; first cave-dwellers, xv, 206; in Great Britain, xiv, 273 Beasts of Prey, xii, 332-65 Beats (sound), iv, 219-20, vii, 279 Beaufort Scale, i, 84, 367 Beaumont, William, ix, 240, x, 121, xvi, 186 Beauty, universal appreciation of, xvi, 145-6 Beaverdam Creek, iii, 38-9 Beaver-dam Lakes, iii, 157 Beavers, xii, 295-6; first lumberers, xv, 206 Beckel Process, v, 287-8 Becquerel, Henri, xvi, 193 Bedbugs, xii, 114; ancient, 104 Bedded Rock (see Sedimentary Rock) Bedford Limestone, iii, 371-2 Bedrooms, air of, xi, 285; furnishings and sleep, xi, 290; lighting of, vi, 275-6, vii, 71 Beds, right, for sleep, xi, 290 Beebread, xiii, 124