Metallurgy, viii, 269-74; historical development, xvi, 51, 59, 74, 174-7 Metals, viii, 17, 126-74, 379; affinities (electromotive series), 127-9; affinity for sulphur, 76, 77; atomic weights, vii, 384, viii, 383; atomic weights in relation to activity, 133, 180; chemical analysis, 286-9, 291-2; colors of compounds due to, 312; common states of, iv, 153; compounds of, viii, 130, 146, 202; corrosion of, 13, 100; cutting of (see Cutting of Metals); electrical conductivity, iv, 259; electrification of, 257, 259; electrochemical analysis, viii, 295; electromotive positiveness, vi, 59; expanding on solidifying, iv, 150; extraction from ores, viii, 131, 269-72; groups of, 181-2; heat conductors, iv, 177, 178-9; identification of, viii, 201, 202, 313; industrial, 154; internal structure, vi, 78-9; in body, viii, 354; in sea, 197; melting point and requirements, iv, 162; melting points, viii, 384; occurrence, 129-31, 198-200; occurrence due to igneous action, xiv, 234, 237-8, 329; original form in earth, viii, 193; periodic classification, 180-1; plant uses of, 337, 341; positive ionization of, 122; potentials against hydrogen, vii, 383; rare earths, viii, 182; refining of, 272; refining, electrolytic, vii, 319-21; resistance (electrical), vi, 77-9; resistance tables, vii, 384; resistance reduced by low temperatures, i, 32; specific gravity table, viii, 384; thermoelectric powers, vii, 383; valency, vii, 384; welding by oxyacetylene blowpipe, 33; X-ray examination, vii, 257 Metamorphic Rocks, iii, 13, 380, xiv, 18-19; jointing of, 133; land forms in, 44, 113; ores in, 234, 237 Metamorphism, iii, 380; by molten intrusions, xiv, 112; fossils and, iii, 265 Metazoa, xii, 25, 26-7 Metchnikoff, x, 143, 201, 209-10, xi, 218 Meteoric Dust, i, 53, 56; in deep-sea deposits, xiv, 285 Meteoric Iron, ii, 292 Meteorites, ii, 290-3; energy from, ix, 25; iron and dust from, iii, 55; origin of life from, xii, 9 Meteorograph, i, 88, 377 Meteorological Instruments, i, 68-89; public display, 266-7 Meteorological Observations, history and organization, i, 212-23; marine, 272-3, 274-6 Meteorological Terms, i, 365-84 METEOROLOGY, Volume i Meteorology, daily interest, xvi, 13; defined, i, 7, 377, xvi, 37; history of development, 114, 177; organized, i, 212-23 Meteors, ii, 283-9; carborundum found in, vii, 310; cause of brontides, i, 196; dust from, i, 53, 56; former meaning, 7; in relation to corona, ii, 224, 225; in relation to solar system, 164; orbits, 287, 288, 289; photographic study, 134-5; planetesimal theory, iii, 162 (see also Meteorites) Meter, length unit, iv, 46, 69, viii, 27-8; radio unit, vii, 272; value in yards, iv, 70