Molybdenum, atomic weight and symbol, viii, 383; use and occurrence, xiv, 238 Moments of Force, iv, 382 Momentum, iv, 62-3, 66-7 Monadnock, Mount, iii, 232 Monadnocks, iii, 35 Monads, xvi, 117, 118 Mondeville, Henri de, x, 39, 40 Mongolian Orongo, xii, 327 Mongols, hair of, xv, 37, 38 (fig.); in yellow race, 37 Mongooses, xii, 351, 352 "Monitor," Ericsson's, v, 380 Monitors (lizards), xii, 208 Monkeys, xii, 376-9; embryological resemblances, xv, 54; expression of feelings by, 64-5; fear in, xi, 136; feet of, iii, 301 (fig.), xv, 61; first appearance, iii, 301; jaguars and, xii, 362; lemurs and, 374, primates, 373; resemblance to man, xv, 57; thumb in, 60 Monkshood, xiii, 196; aconite from, 252 Monochord, xvi, 82 Monocotyledons, defined, xiii, 60; evolution, 181; families, 181-9; first appearance, 319; leaves and flowers, 176, 179; stem formation, 177 (fig.); relative antiquity, 207; subdivisions, 179, 180 Monoecious Plants, xiii, 46 Monogamy, xv, 285, 289-94, 295; among birds, 276-7 Monorail Car, v, 342-3 Monosaccharides, viii, 223-6 Monotony, of work, xi, 275-6, 277-8, 280 Monotype, v, 310-12, 383 Monros, physicians, xvi, 179, 181, 186 Monsoons, i, 130-1, 377, xiv, 350-1; conditions resulting from, 359-60; use of, in early trade, 307 Montana, bad lands of, xiv, 82; fossils found, iii, 250; grasslands and cattle, xiv, 222-3; mining products, iii, 360, 361, 364, 368 Montauk Point, birds at, xiii, 342 Mont Cenis Tunnel, xiv, 240, 241; drills used, i, 27 Montenegro, mountaineers of, xiv, 243 Monte Nuovo, eruption of, xiv, 316, 320 Montpellier, University, x, 36, 38 Montreal, harbor of, xiv, 270 Moodus, Conn., brontides, i, 196, 360 Moon, ii, 193-205; acceleration of, iv, 98; atmosphere, ii, 200, 204, 232; coronas, i, 183; distance, ii, 64, 197-8; earthshine on, 41; eclipses, 32, 206-8; erratic amplitude, 25; falling motion, 64, 65; Galileo's studies, 54, 96, xvi, 103; Halley on motions of, ii, 87; halos, i, 100, 103, 178, 180, 181; Hevelius's studies, ii, 57; influences of, 201; irregularities in motions, 32, 34, 73-4; life on, 204-5, 247; light and heat of, 168, 200; light of, Egyptian knowledge, xvi, 69; non-rotation theory, ii, 376, 377; path around earth, xiv, 292-3; photographic studies, ii, 130; quartering, 28, 194-5; size, 198-9, 230; size as observed by ancients, 27-8, 32; solar corona and, 221, 222; spectrum lines, 112; stereograms of, xi, 181; telescopic views of, iv, 346; theories of origin, ii, 375-6; tides caused by, 70; tides caused by, xiv, 291, 292-3 Moonbeams, measurement of heat of, iv, 301 Moon Dogs, i, 180, 377 Moon-Pillar, i, 376 Moonstone, iii, 329 Moor Fires, i, 56