Limestone, iii, 13, 380; cliffs of, jointing in, xiv, 133; composed of carbonate of lime, iii, 25, 308; destruction by frost, xiv, 76-7; formation of, viii, 152; lime making from, 149, 150, 276; marble from, iii, 169, 189, 371; occurrence in U. S., 371-2; polyzoans in, xii, 47; residual soils from, xiv, 68, 145; sedimentary rock, 18; solubility, iii, 24-5, 126, viii, 151, xiv, 145-6, 147; travertine deposits, 146; uses, iii, 325-6, 373-4, v, 315, 318, viii, 151, 280; weathering of, iii, 27 Limestone Formations, iii, 185, 267, 270; caves in, 127, viii, 151, xiv, 147-8; underground streams in, iii, 116, xiv, 149-50 Limonite, iii, 333, 359, viii, 130, 156 Lincoln, assassination incident, xi, 323; in Holmes's "goodly company," x, 134 Linden Trees, xiii, 324-5, 345-6 Linen, antiquity of, xv, 243; as clothing material, ix, 311-12, x, 307, 309; cellulose composition, viii, 254; from flax plant, xiii, 235; paper from, v, 290-1, 292 Lines of Force (electric), iv, 261-2, vi, 295-6 Lines of Force (magnetic), iv, 251-2, 261, 274-5, vi, 33, 54, vii, 371; cutting of, iv, 301-8, vi, 23, 54, 307-8; direction, iv, 277-8, vi, 54-5, 88-90; leakage, vii, 371; least resistance tendency, vi, 43-4, 96; shortest direction tendency, 219; terrestrial, 39, 40; terrestrial, in relation to aurora, i, 159-60 Line Squalls, i, 138-9, 376 Link Motion, v, 208-10, 379 Linnæus (Carl von Linné), x, 84, 134; natural history work, xvi, 116, 126, 139, 165; rattlesnake named by, xii, 235 Linotype, Mergenthaler, v, 308-10, 381-2 Linsangs, xii, 353 Linseed Oil, viii, 231-2, 246; action in paint, 264, 265; source, xiii, 235; spontaneous combustion of, viii, 55-6 Lions, xii, 359-60; fearlessness, xi, 136; instinctive fear of fire, 46; strength of, xv, 16, 18 Lipari Islands, volcanoes of, xiv, 317 Lipases, viii, 357, x, 326 Lipins, viii, 350-1 Liquefaction of Gases, i, 29, 32, iv, 143, 153, 171, 188, 191-2, viii, 303-4 Liquid Air, i, 26, 29-33, iv, 190-2, vii, 323, viii, 68; boiling point, iv, 173; oxygen production from, viii, 67, 274; temperature, and pressure, iv, 172