Atomic Theory, history and deductions, viii, 110; in Greek philosophy, xvi, 83-4, 87, 118; Leibnitz's, 117-18
Atomic Weights, viii, 92, 383; chemical calculations by, 96; classification of elements by, viii, 177-83, 189, xvi, 163; determination of, viii, 306-7; hydrogen basis, 33; introduction, xvi, 134; physical state and, viii, 297-8; properties dependent on, xvi, 134; radioactivity and, viii, 184, 185-6, 188; regular increase in similar elements, 132, 176, 179; specific gravity and, 313; specific heat and, 308-9; table, vii, 384, viii, 383
Atoms, viii, 25-7; asymmetric, 309-10; chromophor groups, 258; defined, iv, 21, vi, 110-11, viii, 374; vii, 362, disintegration, 185-7, 188; dissociated, in ball lightning, vii, 214-15; electrification, vi, 122-3; energy of (see Atomic Energy); Greek theory, xvi, 118; laws involving, viii, 110; Leibnitz on, xvi, 118; magnetic fields of, vi, 117; motion within, viii, 309-10; of body, Epicurean theory, x, 26; size, vi, 112-13, 115; stability, vii, 215; structure of, iv, 23, 55, vi, 113-15, 120-1, viii, 187-9, 307; unchangeableness, 175-6
Attention, xi, 228-36; habit and, 253-5; methods of arousing, in advertising, 344-8; ordinary meaning, 40
Attraction, scientific meaning, vii, 362, iv, 96
Audibility, distances and variations, i, 187-92; vibration limits of, iv, 204, ix, 99
Audion, iv, 315-16, vi, 339 (fig.), vii, 279, xvi, 191-2 (see also Vacuum Tube)
Auditoriums, acoustic qualities, iv, 239; cooling system, 188; echoes in, 238
Auditory Nerve, ix, 101 (fig.), 142, xi, 30, 102; internal and external stimulations, iv, 203
Aurignacian Implements, xv, 100, 105, 108-9
Aurora, i, 158-62, 367; altitude, 17; magnetic disturbances with, vi, 40; ozone from discharges, i, 16; sun-spots and, ii, 176, 186
Ausable Chasm, iii, 44, 243, xiv, 128, 131
Australia, animals of, xii, 204, 249, 272, 274-5, 276-7, 278-80, 285; barramundi fish of, 154; barrier reef of, xii, 41, xiv, 263; big trees, xiii, 26; black swan of, xii, 259; "bush" of, xiv, 378-9, 380; bushmen, iii, 304; climate, xiv, 358; coasts, coral reefs on, xii, 40, 41; desert sounds, i, 196; former connections, xii, 277; glacial and coal deposits, iii, 203-4; grasslands, xiii, 373; island or continent, xiv, 23; ladybirds and scales, xv, 22; landlocked area, xiv, 190, 222; mining production, iii, 362, 365, 368, 370; monsoons, i, 131; mountains in Permian Period, iii, 205; parrots of, xii, 266; pearl fisheries of, 62; plateau and plains, xiv, 218-22; rabbit pest in, xv, 20; ria coasts of, 257; rivers and drainage of, xiv, 197; sheep raising, 384; snakes of, xii, 214-29; temperate forests, xiii, 372; timber supplies of, xiv, 382; weather effects on history, i, 324; wheat cultivation, xiii, 211; wild rice, 214