ii. 236, 266, 278

Bass Rock, i. 372, 373, 403 Bassenthwaite Lake, i. 335 Bathgate, puy eruptions of, i. 440, 442, 445, 456, 461 Bauer, Dr. M., i. 62 Bauxite, ii. 197, 204 Bayley, Mr. W. S., ii. 330 Bedding in lavas, i. 24 Bell, Sir I. Lowthian, ii. 1, 113, 137, 165 Bemrose, Mr. H. A., ii. 10, 11, 13, 16, 17, 18, 20, 21 Ben Cruachan, alteration of granite at, i. 343 ---- Hiant, basic sills of, ii. 318 Benaun More, felsite of, i. 347 Berger, J. F., ii. 22, 95, 110, 113, 139, 140, 141, 145, 199, 364, 426 Bertrand, Prof. M., i. 28 Berwickshire, i. 272, 290, 338, 375, 385, 401, 413 Berwyn Hills, i. 176, 186, 208, 218 Biggar, volcanic area, i. 287, 325 Binney, E., ii. 56 Binny Craig type of basalt, i. 419, 421 (444) Biotite (_see_ Mica) Bitumen in intrusive rocks, i. 421 Blackstone (Derbyshire), ii. 18, 21 Blair-Atholl Limestone, i. 122 Blake, Rev. J. F., i. 126, 130, 144, 160, 161, 162, 163, 165, 166, 168, 220, 221, 222 Blocks, ejected, i. 36, 423, 438; ii. 197, 221 Bole between lavas, i. 442; ii. 197, 203, 206, 254 Bombay, volcanic plateau of, ii. 180 Bombs, volcanic, i. 60; ii. 39 Bonney, Prof., i. 95, 126, 130, 136, 144, 160, 162, 163, 164, 165, 166, 167, 168, 192, 210, 227 Borrowdale Volcanic Series, i. 227 Bosses, volcanic, i. 56, 78, 88; petrography of, 89; differentiation in, 90; ii. 476; granitic, i. 93; metamorphism around, 94, 95; conditions of their intrusion, 97, 98; weathering of, 102 ---- Silurian, i. 215, 235; Old Red Sandstone, 277, 288; Carboniferous, 403, 458 ---- Tertiary, ii. 271, 284, 327, 366, 378, 395, 403; boundaries of, 382; relation to older eruptive vents, 280, 384, 399; relation to plateau basalts, 386, 396, 402, 404; relation to gabbro intrusions, 391, 402, 404; relation to the basic dykes, 395 Bostonite, ii. 47 Boué, Ami, i. 268, 363; ii. 112, 372 Boule, M., i. 27, 29, 44, 45, 46, 61; ii. 375 Boutan, M., i. 62 Bowden Hill, type of doleritic basalt, i. 418, 421 Braid Hills, great vent of, i. 289, 293, 311, 318, 323 Branco, Prof. W., i. 46, 417 Breccias, volcanic, i. 31, 32, 120, 131, 135, 147, 165, 189, 190, 197, 213, 224, 225, 233, 234, 246, 252, 255, 289, 347; ii. 39, 41, 49, 195 ---- of non-volcanic materials, ii. 196, 423 Brecciated structure, i. 162, 211 Breidden Hills, i. 176, 190, 208 Brent Tor, ii. 33, 35, 36 Bréon, M. R., ii. 191 Britain, advantageous position of, for the study of ancient volcanic action, i. 6; completeness of the Geological Record in, 6; direction of folds and fractures in, 11; chief lavas found in, 31; Vesuvian cones of, 42; volcanic plateaux of, 43; puys of, 46; lacustrine volcanoes of, 49; fissure eruptions of, 52; scenery of volcanic rocks of, 100, 101; pre-Cambrian rocks of, 111; in Cambrian time, 141; in Silurian time, 173; in Devonian time, 258; in Old Red Sandstone time, 263; in Carboniferous time, 355; in Permian time, ii. 53; in older Tertiary time, 108 Brögger, Prof., i. 28, 88, 90, 91, 92 Bryce, J., i. 314, 369 Buch, L. von, i. 27; ii. 381 Buckland, W., ii. 95, 110, 113 Buddle, J., ii. 113 Builth, i. 176, 203 Burdiehouse Limestone, i. 361, 374, 388, 415, 463 Burnt Country of Asia Minor, i. 2 Burntisland, Binn of, i. 428, 429, 433, 435, 457, 459 Burntisland Sill type of dolerite, i. 418, 421 Busz, Mr. K., i. 261 Bute, Isle of, i. 369, 378, 407

Cadell, Mr. H. M., i. 114, 423; ii. 334 Cader Idris, volcanic rocks of, i. 42, 175, 176, 177, 178, 179, 180, 181, 182, 188, 207 Caer Caradoc, i. 131, 132, 170 Caerfai group (Cambrian), i. 155 Caernarvonshire, volcanic rocks of, i. 159, 207 Caithness Flags, i. 343, 352 ---- volcanic vents in, i. 352 Calciferous Sandstones, i. 361, 366, 415 Calcite as a matrix of tuffs, ii. 27, 39, 41 Caldecote volcanic rocks, i. 170 Callaway, Dr. C., i. 126, 130, 132, 134, 220, 221 Calton Hill, lavas and tuffs of, i. 373, 378, 385, 386, 389 Cambrian system, i. 112, 123, 133, 139, 143, 144; volcanoes of, 145, 159 Campbeltown, volcanic rocks of, i. 312, 386 Campsie Fells, i. 102, 368, 369, 384, 386, 389, 393, 397, 398, 400, 403, 410, 412, 447 Canary Islands, i. 27 Canna, basalts of, ii. 184, 187, 190, 215, 216; vent in, 288 Cantyre, volcanic rocks of, i. 311, 369, 370, 386 Caradoc group, i. 175, 196 Carbonaceous rocks, influence of, on igneous masses, i. 95, 426, 449, 456;