Lactic Acid, viii, 222, 223, 248, xi, 24-5; fatigue product, 271-2; stimulant, 272-3; from fermentation, x, 138; in body, 280 Lactometer, iv, 113 Ladakhis, character of, xiv, 245 Ladybirds, xii, 122; lemon tree scales and, xv, 22 Laënnec, René, T. H., x, 108-10 Lag, angle of, vii, 362; in electric currents, vi, 167; correction, 262 Lagrange, mathematical work, xvi, 105, 125; scientific work of, ii, 15, 71-2, 73, 74, 75, 216, 375 Laid Paper, v, 296 Lake, Simon, submarine of, v, 382 Lake Dwellers, agriculture, xiii, 210; houses and implements, v, 14 Lakes, iii, 142-57, xiv, 198-212; color of, viii, 40; economic importance, xiv, 212; ephemeral character, iii, 142, xiv, 198-9, 209-12; few in mature regions, xiv, 160; freezing of, iv, 150; processes of destruction, iii, 157, xiv, 198, 210-12; salt, 206-9; shore-line development, iii, 57-8; sizes and depths, xiv, 204 Lake Superior Region, glacial topography of, xiv, 56; mines, iii, 356-7, 358, 361, viii, 163; rock formation, iii, 172, 175, 176-7 Lakeview Gusher, iii, 354 Lamarck, cloud classification, i, 97; on inheritance of acquired characters, ix, 325-6; paleontological work, xvi, 169 Laminated Construction, vi, 316, vii, 371 Laminated Magnets, vi, 34 Lammergeiers, xii, 261 Lampblack, viii, 47 Lampreys, xii, 130-1 Lamps, portable, vi, 276-7, vii, 68-9 Lamp-Shells, xii, 47-8 Lancashire Cotton Mills, xiii, 236 Lancelets, xii, 129 Lancisi, x, 98, 154 Land, Land Surfaces, always some unsubmerged, xiv, 19-20; area and distribution, 20-2; area measurements, 10-11; changes in features of, 28-30; character of old and new, iii, 33-5, xiv, 48-9, 155-63; elevation distribution, 26-7; forms determined by earth movements and erosion, xiv, 33-79; forms determined by rocks, 80-113; heating and cooling of, i, 208, xiv, 346; level changes (see Level Changes); oldest, iii, 168-9; relief features, orders of magnitude, xiv, 27; rock formation, 19; wind variations on, 351 (see also Continents) Land-and-Sea Breezes, i, 131, 376 Land Animals, beginnings of, iii, 20, ix, 176; development of, iii, 285-6, xii, 167; salt in body fluid of, ix, 175-6 Land Filling, by machine, v, 258-9 Landlocked Areas, of continents, xiv, 190 Land Plants, beginnings, iii, 252; development, xiii, 304-22 Land Plaster, iii, 376 Landscape Gardening, xiii, 267-97; color contrast and induction in, xi, 95 Landscape Painting, xv, 302 Landscapes, changes in, iii, 10, xiv, 28; dramatic interest in, xiii, 11 Land-sculpture, xiv, 30 Lane's Law, ii, 309, 371, 380, 383 Lanfranchi of Milan, x, 38, 39 Langenbeck, Bernard von, x, 130-1