-- products, order of appearance of, 198, 199 Volcanic rocks, 61 -- -- similarity of ancient and modern, 253 Volcano, origin of name, 3 -- craters of, 167 -- Island of. _See_ Vulcano. -- compared to steam-engine, 8 Volcanoes, blocks, ejected from, 45 -- built up of ejected fragments, 74 -- destruction caused by, 281 -- dissected by denudation, 115, 139 -- erroneous ideas concerning, 1 -- ejection of different materials from, 205 -- known to ancients, 3 -- life-history of, 186 -- number of, 224, 225 -- of Africa, 227 -- of America, 236 -- of Asia, 236 -- of Bohemia, 126 -- of Central Asia, 236 -- of Central Pacific, 236 -- of Europe, 227 -- of Hungary, 126 -- position in relation to mountain chains, 243 -- popular ideas concerning, 1 -- reservoirs beneath, 145 Volvic lava of, 103 Vose, cited, 346 Vulcan, forge of, 3 Vulcano, island of, 3, 158 Vulcano and Theodosius, 3 _Vulcano_, 178, fig. 77 -- _and Vulcanello, view of_, 43, fig. 6 -- chemical deposits at, 44 -- eruption in 1786, 43 -- -- in 1873, 43 -- -- _lava-stream in_, 95, fig. 19 -- --, 103, fig. 27 -- _plan of_, 195, fig. 85 -- _section of volcanic cone in_, 116, fig. 35 -- section in, 129 -- shifting of centre of eruption in, 196 _Vulcanello, craters of_, 197, fig. 86 Vulcanology, origin of the science, 4 -- earliest treatise on, 5 Walferdin, M., cited, 340 Water in lavas, 353 -- penetration through rocks, 358 -- presence of in lavas, 102 -- and saline solutions in cavities of crystals, 63 Werner, cited, 201 Western Isles of Scotland, 103, 139, 142 -- -- volcanoes of, 212 Whymper, Mr., 69 Woodward, Mr., experiments of, 119 Wrekin, ancient volcanic rocks of, 259 YOUNG, Professor, cited, 365 ZEOLITES, formation of, 150 PRINTED BY SPOTTISWOODE AND CO. LTD., NEW-STREET SQUARE LONDON THE INTERNATIONAL SCIENTIFIC SERIES. Each Book Complete in One Volume. Crown 8vo. cloth, 5_s._ unless otherwise described. I. FORMS of WATER: in Clouds and Rivers, Ice and Glaciers. By J. Tyndall, LL.D., F.R.S. With 26 Illustrations. Twelfth Edition. II. PHYSICS and POLITICS; or, Thoughts on the Application of the Principles of 'Natural Selection' and 'Inheritance' to Political Society. By Walter Bagehot. Tenth Edition. III. FOODS. By Edward Smith, M.D., L.L.B., F.R.S. With 156 Illustrations. Tenth Edition. IV. MIND and BODY: the Theories of their Relation. By Alexander Bain, LL.D. With Four Illustrations. Ninth Edition. V. The STUDY of SOCIOLOGY. By Herbert Spencer. Eighteenth Edition. VI. The CONSERVATION of ENERGY. By Balfour Stewart, M.A., LL.D., F.R.S. With 14 Illustrations. Eighth Edition.