BIBLIOGRAPHY. GENERAL WORKS: Playfair, Illustrations of the Huttonian Theory of the Earth (Edinburgh, 1802) ; Lyell, Principles of Geology (2d ed., London, 1875) ; A. Geikie, Text book of Geology(London, 1893) ; Dana, Manual of Geology (4th ed., New York. 1895) ; Le Conte, En-melds of Geology (New York, 1891) ; Prest wich, Geology, Chemical, Physical, and Strati graphical (Oxford, : A. Heilprin, Prin ciples of Geology (1890) ; Bisehof, Chemical and Physical Geology (London, ; Scott. Ele mentary Geology (New York, 1883) ; Tarr, Elementary Geology (New York, 1897) ; Jukes Browne, Handbook of Physical Geology (New York, 1893) ; Winehell, Geological Studies (New York, 1886) ; Geikie, Outlines of Field Geology (3d ed., London, 1883).—COSMICAL GEOLOGY: Croll, Climate and Time (Edinburgh, 1885) ; Fisher, Physics of the Earth's Crust (London, 1881) ; Ball, The Earth's Beginning (London, 1901) ; Green, Vestiges of a Molten Globe (Lon don, 1887).—MINERALOGY AND PETROGRAPHY : Dana, Manual of Mineralogy (3d ed., New York, 1878) ; Moses and Parsons, Mineralogy, Crys tallography and Blowpipe Analysis (New York, 1895) ; Rosenbusch, Mikroskopische Physiographie der Mincralien and Gesteine (Stuttgart, 1885 87) ; Zirkel, Lehrbuch der Petrographie (Leipzig, 1893-95).—DYNAMIC AND STRUCTURAL GEOLOGY: Suess, Das Antlitz der Erde (Prague, 1883-88); Daubree, Etudes synthetiques de geologie ex perimentale (Paris, 1879) ; Merrill, Rocks, Rock Weathering and Soils (New York, 1897) ; Geikie, Earth Sculpture (London, 1898) ; Shaler, As pects of the Earth (New York, 1890) ; Reade, The Origin of Mountains (London, 1886) ; Dana, Characteristics of Volcanoes (New York, 1890) ; Bonney, Volcanoes (London, 1898) ; Russell, Volcanoes of North America (New York, 1897) ; Geikie, Ancient Volcanoes of Great Britain (Lon don, 1897) ; Hull, Volcanoes, Past and Present (London, 1892) ; Judd, Volcanoes (New York, 1881) ; Milne, Earthquakes (New York, 1886) ; Powell, Canyons of the Colorado (Meadville, Pa., 1895) ; Russell, Rivers of North America (New York, 1898) ; Russell, Lakes of North America (Boston, 1894) ; Hovey, Celebrated American Caverns (Cincinnati, 1882) ; Darwin, Coral Reefs (London, 1891) ; Dana, Corals and Coral Islands (New York, 1890).—PHYSIOGRAPIIIC GEOLOGY:
Gilbert, Geology of the Henry Mountains (Wash ington, 1877) ; Davis, Physical Geography (Bos ton, 1900) ; Tarr, Elementary Physical Geography (New York, 1895) ; Geikie, The Scenery of Scot land (London, 1887) ; Avebury (Lubbock), Scenery of Switzerland (London, 1896).—STRATI GRAPHICAL GEOLOGY AND PALEONTOLOGY: Zittel Eastman, Text-book of Paleontology (London, 1900) ; Keyser-Lake, Text-book of Comparative Geology (Stuttgart, 1893) ; Nicholson and Ly dekker, Manual of Paleontology (London, 1889). —GLACIAL GEOLOGY: Geikie, The Great Ice Age (New York, 1895) ; Wright, The Ice Age in North America (New York, 1890) ; Russell, Glaciers of North America (Boston, 1897) ; Bon ney, Ice Work (New York, 1896).—EcoNomic GEOLOGY: Phillips, Treatise on Ore Deposits (London, 1896) ; Kemp, Ore Deposits of the United States and Canada (3d ed., New York, 1901) ; Tarr, Economic Geology of the United States (New York, 1894).—HISTORY OF GEOLOGY: Geikie, The Founders of Geology (London, 1897). GEOLOGICAL REPORTS AND PERIODICALS: The gov ernments in both America and Europe have geological bureaus which are actively engaged in the investigation of geological problems. In the United States this bureau, known as the United States Geological Survey, publishes reports, bul letins, and monographs of great value. There are also geological surveys in operation in the different States. Among the leading geological journals in America may be mentioned: Journal of Geology (Chicago) ; American Geologist (Min neapolis) ; American Journal of Science (New Haven) ; Bulletin of the Geological Society of America (Rochester). In England the leading journals are the Geologist (London), and Quar terly Journal of the Geological Society (Lon don). The leading German periodicals are: Neues Jahrbuch fur Geologie, Mineralogie and Paleontologic (Stuttgart), and Zeitschrift fur praktisehe Geologie (Stuttgart).