Beech Forests, carbon used by, i, 14; of Chile, xiv, 371; of Denmark, xv, 86-7; water requirements of, xiv, 377-8 Beech Trees, family, xiii, 193; in landscaping, 271-2; leaf-bud protection, 34; of U. S., 368, xiv, 372 Beef, calories in, ix, 299; proteins in, 279; vitamines in, x, 262 Beef Extracts, value, viii, 362 Bees, xii, 125-6; appearance in Tertiary, 104; jaws and maxillæ in, 100; plant visitors, xiii, 123-4, 126-7, 128-30, 137-9 Beeswax, viii, 221-45; melting requirements, iv, 162 Beetles, xii, 121-4; appearance of, 104 Beets, antiscurvy vitamines in, x, 266; origin and antiquity, xiii, 222; sugar storage in, ix, 27-8; swelled roots, xiii, 19 (see also Sugar Beet) Beet Sugar, viii, 226-7, 242, xiii, 216; compared with glucose, ix, 230 Beginners' Luck, xi, 253 Begonias, coloring of leaves, xii, 42; reproduction, 165-6 Beheaded Streams, xiv, 182-3 Behel, Jacob, v, 248 Belgians, in Alpine group, xvi, 49 Belgium, fossils found in, iii, 292; German invasion, reasons, xiv, 91-2; low elevation, 247; mistpoeffers, i, 195; tobacco consumption, xiii, 256; topography of, xiv, 86 (map), 90-1; zinc production, iii, 364 Bell, Alexander Graham, telephone invention, vii, 92, xvi, 188 Bell, Charles, x, 117 Bell, John, x, 129 Bell, Rev. Patrick, v, 246 Bell-crank Levers, v, 24-5 Belle Isle Strait, proposed damming, i, 345 Bells, vibrations of, iv, 221-2 Bell Telephone System, vii, 92; automatic telephones, 106 Benedictine Order, medical work of, x, 36 Benguella Current, xiv, 305 Ben Nevis, rime growth, i, 122; St. Elmo's Fire, 158 Benz, Karl, v, 213 Benzaldehyde, viii, 239 Benzene, viii, 51, 234-5, 374; derivatives, 236; from coal tar, 253; freezing and melting points, iv, 163-4 Benzene Hydrocarbons, viii, 206, 232-6; derivatives, 236-40; products, 52, 241, 258 Benzene Ring, viii, 233, 234, 240 Benzine, viii, 234-5 Benzoic Acid, viii, 236, 239, 372 Benzol, viii, 234-5 Benzyl Alcohol, viii, 239 Benzyl Bromide, viii, 263 Berea Sandstone, iii, 372 Berengario of Carpi, x, 52, 60 Bergman, chemist, xvi, 119, 120, 174 Bergshrund, iii, 66 Bergson, philosophy of, xvi, 196 Beriberi, ix, 35-6, x, 257-9, 264; cause of, viii, 369; racial susceptibility to, xv, 50-1 Bering Sea, seal breeding in, xii, 334 Bering Strait, xiv, 22 Berkshire Hills, formation, iii, 188, 190 Berlin, sewage disposal, viii, 327 Berliner, Emile, gramophone, v, 328-9, 382; transmitter, 381 Bermudas, climate of, xiv, 370-1; coral reefs of, xii, 40 Bernard, Claude, x, 127-8, xvi, 185-6 Berries, xiii, 54; poison in wayside, 252 Berson, balloon ascension, i, 18, v, 225 Bertrand, Alexandre, xvi, 185-6 Beryl, iii, 324-5 Berzelius, Jacob, xvi, 160-1, 165; on fermentation, x, 138