Kilowatt, iv, 80, 312, vi, 85, vii, 370 Kilowatt-Hour, iv, 81, vi, 82, 84; meters and charges for, vii, 174 Kinaesthetic Sensation, xi, 124-8; space perception by, 166-7, 169-70, 175, 183, 186; strain in attention, 228, 231-2; in will, 265 Kindling Temperature, viii, 54 Kinematic, defined, iv, 382 Kinetic, defined, iv, 382 Kinetic Energy, iv, 79, 81, 83; defined, v, 84, vii, 368; forms of, iv, 82-5, 87-8 Kinetic System of Body, xi, 57, 60-1; action in attention, 231-2; connection with sensation, 67, 68, 127 Kinetic Theory, iv, 30, 131; of gases, viii, 305-6, 378 Kinetics, defined, iv, 25 Kinetoscope, iv, 348, v, 330 King, Prof. L. V., i, 190-1 Kingfishers, xii, 267 King's River Canyon, iii, 43, 225 Kingston Earthquake, xiv, 340 Kiosks, weather, i, 75, 267, 376 Kipling, airship prediction, i, 43; "female of the species," x, 162; on dew ponds, i, 353 Kirchhoff, spectrum lines, ii, 17, 112-13 Kitasato, x, 164 Kitchens, lighting, vi, 276, vii, 71 Kite Balloons, v, 226 Kites, v, 230, 233-5; action of wind on, iv, 42-3, 76 (fig.); aerological uses, i, 18, 19, 22, 89 Kittatinny Ridge, Delaware Water Gap through, xiv, 169; rock weathering at, 776 Kiwis, xii, 243, 249 Klamath Mountains, iii, 214 Klebs, Edwin, x, 141, 155 Knee-cap, ix, 69, 70 (fig.) Knee Jerk, ix, 136 Knitted Goods, threads in, v, 277 Knitting machines, inventions, v, 282-3, 377, 378, 379 Knots, tying, by machine, v, 247-8 Knotweeds, xiii, 194 Knowledge, Bacon on, xi, 10; Bergson on intuitive, xvi, 196; Greek theories, 87-8; growing thirst for, vi, 330; relativity of, xvi, 195-6; St. Augustine on proper, 99-100; science and, 39-40, 41-2; scientific, remarks on, iv, 26; transmission means, xv, 142, 145-6, 167 Koch, Robert, x, 149-50, 169, 292, xvi, 184, 185; "postulates" of, x, 150, 160, 196 Kodak, invention, v, 382 Koenig, acoustician, iv, 52, 233 Kohl-rabi, xiii, 223, 333-4 Kopjes, of S. Africa, xiv, 82 Korea, geology of, xiv, 125 Kraft Paper, v, 294 Krakatoa Eruption, xiv, 324-5; atmospheric waves from, i, 188, xiv, 324; distances heard, i, 188; dust from, 57-8, iii, 100-1, xiii, 344, xiv, 325; noctilucent clouds from, i, 18; plant and animal extinction by, xiii, 345, xiv, 278 Krakatoa Island, xiv, 324; restocked after eruption, xiii, 344-5, xiv, 278 Krasnoiarsk Iron, ii, 284 Kril, xii, 19 Krypton, in atmosphere, i, 11, 12; symbol and atomic weight, viii, 383 Kut-el-Amara, i, 308 Labor-saving Machinery, remarks on, vii, 73-4, 75, xi, 268 Labrador, auks of, xii, 265; climate of, xiv, 345 Labrador Current, i, 345, xiv, 305 Labradorite, iii, 329 Laccoliths, xiv, 109 Lace Coralline, xii, 47 Lace Leaf Yam, xiii, 89-90, 32 (illus.) Laces, machine-made, v, 287-8