Mental Types, xi, 152-9 Mercaptan, smell of, xi, 80 Mercerized Cotton, viii, 255 Mercuric Chlorides, viii, 170, 333 Mercuric Mercury, test for, viii, 287, 288 Mercuric Oxide, instability, viii, 101; oxygen preparation from, 34, 170 Mercurous Mercury, test for, viii, 288 Mercury (metal), affinity intensity, viii, 128; atomic weight and symbol, 383; barometric column of, iv, 30; compounds, viii, 170; density of, iv, 113; electrical conductivity, 283; expansion by heat, 135; freezing point, 153; heat capacity, 155; light of, viii, 172; melting point and requirements, iv, 162, viii, 384; ores and production, iii, 370, viii, 198, 270; properties and uses, iii, 370, viii, 126-7, 170; specific gravity, 384; specific heat, iv, 155; use of, in syphilis, x, 60, 104; use of, in thermometers, iv, 135, 137, 153 Mercury (planet), ii, 189-90; atmosphere, 190, 246; life on, 245-6; "lucid" planet, 264; motion at perihelion, 79, 81; non-rotation theory, 377; orbit, 39, 73, 162, 163; size, 162; weight, 76, 77 Mercury Arc Converters, vii, 365 Mercury Arc Lamp, vi, 281-3 Mercury Arc Rectifiers, vi, 331, 333-9 Mercury Fulminate, viii, 145 Mercury Vapor, viii, 309 Mergansers, xii, 257 Mergenthaler Linotype, v, 308-10, 381-2 Meridian Photometer, ii, 297 Mesaba Range, iii, 358 Mesas, iii, 140, 380, xiv, 81, 82 Mesenchyme, xii, 26-7 Mesentery, ix, 59 Mesopotamia, ancient empire of, xiv, 306; astronomy of ancient, xvi, 70; British campaign, i, 308; cradle of human race and history, xvi, 46, 51; food plant center, xiii, 221, xiv, 381-2; mirage in World War, i, 173; ostriches of, xii, 249; photographic mapping, i, 47; present desert character, xiv, 219; scurvy in, during World War, x, 265; wild wheat of, xiii, 210 Mesozoic Era, iii, 20, 208-20; animal life in, 270, 272, 275, 285, 286; birds of, xii, 239, 242; divisions and species of, xv, 71; mammals of, iii, 297, xii, 271; marsupials in, 277; plants of, iii, 255, 256, 257; reptiles of, 286-95, xii, 183, 188, 194-5, 202-3; sharks of, 143 Messages, primitive methods of sending, xv, 165-7 Messina Earthquake, xiv, 340-1 Mesue of Damascus, x, 32 Metabolism, ix, 37, x, 268; calculation of, 269-70; daily total in calories, ix, 296, 297; disease in relation to, 302-4, x, 268-81; fatigue caused by, ix, 80, 81; food requirements for, 289, 295-301; protein, x, 277-80; protein effects on, ix, 301-2; rate of, how influenced, x, 270-1; studies of, 128, 382; temperature effects on, ix, 37, 306-7 (see also Cell Metabolism, Basic Metabolism, Functional Metabolism, Growth Metabolism) Metal-Bearing Deposits, iii, 355-70 Metallography, vi, 78, viii, 273-4, xvi, 175-6