gested. The characteristic pisolitic structure of the upper portion of the deposits indicates chemical precipitation. The granitic bauxite forming the lower or basal portions of the beds, and the bowlders, are evidently of a different origin. The bauxite was probably laid down. on the syenite rather than on the kaolin, as there is no indication that the kaolin is an intermediate product between the fresh syenite and the bauxite. In his report on the igneous rocks of Arkansas Dr. J. Francis Williams suggests two theories for the accumulation of the bauxite. First, that the bauxite was formed by the decomposition of a bed of clastic material, derived principally from the syenite. The second, which he regarded as the most probable one, involved the action of the waters of the Tertiary sea on the still highly heated igneous rocks, in which, under high temperature and pressure, the constituents of the syenite were dissolved and brought to the surface in solution, the water emerging as hot springs. In the discussion of these theories Dr. Hayes points out serious difficulties to both. In the last part of the report Dr. Hayes treats of the "Economic Relations" under "Development;" "Amount of Ore," which includes a tabular statement of the estimate of the amount of ore in the Arkansas bauxite region, and, according to the author's calculations, shows the total amount estimated in outcrops to be 6,608,500 long tons, and the total amount under cover 43,711,200 long tons; "Quality of the Ores ;" and "Mining and Preparation of the Ore for Market." DENISON UNIVERSITY, Granville, Ohio. THOMAS L. WATSON. RECENT PUBLICATIONS -ADAMS, CHARLES C. Baseleveling and its Faunal Significance, with Illustrations from Southeastern United States. [Reprint from The American Naturalist, Vol. XXXV, No. 418, October, 1901.] Ginn & Company, Boston, 1901. -BAKER, FRANK COLLINS. Some Interesting Molluscan Monstrosities. Transactions of the Academy of Science of St. Louis, Vol. XI, No. 8. Issued November 26, 1901. -BLASDALE, WALTER C. Contributions to the Mineralogy of California. [Bulletin of the Department of Geology, University of California, Vol. II, No. 11, pp. 327-348.] Berkeley, November, 1901. -COLEMAN, A. P. Glacial and Interglacial Beds Near Toronto. [Reprinted from the JOURNAL OF GEOLOGY, Vol. IX, No. 4, May-June, 1901.] The University of Chicago Press. Marine and Freshwater Beaches of Ontario. [Bulletin of the Geological Society of America, Vol. XII, pp 129-146.] Rochester, March, 1901. -Collie, GEORGE L. Physiography of Wisconsin. [Reprinted from the Bulletin of the American Bureau of Geography, Vol. II, No. 3, September, 1901.] Winona, Minn., 1901. -Congrès Geologique International. Comptes Rendus de la VIII Session, en France. Imprimerie Le Bigot Frères, Lille. Paris, 1901. -DARTON, NELSON HORATIO. Preliminary Description of the Geology and Water Resources of the Southern Half of the Black Hills and Adjoining Regions in South Dakota and Wyoming. [Extract from the Twentyfirst Annual Report, United States Geological Survey, 1899-1900. Part IV-Hydrography.] Washington, 1901. -DINGES, J. Textbuch zum Relief der Nördlichen Kalkalpen. 1:50000. A. Fackler, Mindelheim (Südbayern), 1901. -DUBOIS, EUGENE. Paradoxe klimatische toestanden in het Palæozische tijdvak, beschouwd in verband met den vroegeren aard der zonnestraling. [Overgedrukt uit de Handelingen van het Achtste Nederlandsch Natuur- en Geneeskundig Congress.] -ECKEL, EDWIN C. The Portland Cement Industry in New York. [Published, by permission of the State Geologist of New York, in Engineering News, May 16, 1901.] The Snakes of New York State: An Annotated Check List. [Reprint from the American Naturalist, Vol. XXXV, No. 410, February, 1901.] Ginn & Company, Boston, 1901. -FINSTERWALDER, S., ET E. MURET. Les Variations Périodiques des Glaciers. Sixième Rapport, 1900. [Extrait des Archives des Sciences physiques et naturelles, T. XII, 1901.] Librairie Georg & Cie., Genève. 1901. -GOULD, CHARLES NEWTON. The Dakota Cretaceous of Kansas and Nebraska, and other papers. [From Vol. XVII, Transactions Kansas Academy of Science.] Topeka, 1901. – HARKER, ALFRED. Ice-Erosion in the Cuillin Hills, Skye. [Transactions of the Royal Society of Edinburgh, Vol. XL, Part II (No. 12).] (With a map.) Robert Grant & Son, 107 Princes Street, Edinburgh; and Williams & Norgate, 14 Henrietta Street, Covent Garden, London, 1901. -HOBBS, WILLIAM HERBERT. The Newark System of Pomperaug Valley, Connecticut. With a Report on Fossil Wood by F. H. Knowlton. [Extract from the Twenty-first Annual Report U. S. Geological Survey, 1899-1900, Part III-General Geology, Ore and Phosphate Deposits, Philippines.] Washington, 1901. The River System of Connecticut. [Reprinted from the JOURNAL OF GEOLOGY, Vol. IX, No. 6, September-October, 1901.] The University of Chicago Press. -KEILHACK, CONRAD. Provinz Pommern. Geologisch-morphologische Übersichtskarte der Mit Benutzung der Aufnamen der Geologischen Landesanstalt entworfen. In Vertrieb bei der Königlich Preussischen Geologischen Landesanstalt u. Bergakademie, Berlin, N. 4, Invalidenstrasse 44. -Kunz, George F. The Production of Precious Stones in 1900. [Extract from Mineral Resources of the United States, Calendar Year 1900: David T. Day, Chief of Division of Mining and Mineral Resources, U. S. Geological Survey.] Washington, 1901. —LANE, A. C. The Economic Geology of Michigan in its Relation to the Business World. [Lecture delivered at the Field Columbian Museum, Chicago, November 2, 1901.] The Michigan Miner, Saginaw, Mich., December 1, 1901. -MERRILL, GEORGE P. On a Stony Meteorite, which fell near Felix, Perry County, Alabama, May 15, 1900. [From the Proceedings of the United States National Museum, Vol. XXIV, pp. 193-198 (with Plates XIII, XIV).] Washington, 1901. —MOLENGRAAFF, G. A. F. Géologie de la République Sud-Africaine du Transvaal. [Extrait du Bulletin de la Société Géologique de France.] 28, Rue Serpente, VI, Paris, 1901. -United States Department of Agriculture. Report No. 70. Exhaustion and Abandonment of Soils. Testimony of Milton Whitney, Chief of Division of Soils, before the Industrial Commission. Washington, 1901. -United States Geological Survey. Twenty-first Annual Report, 1899–1900. Part I, Director's Report, including Triangulation, Primary Traverse, and Spirit Leveling. Part VI, Mineral Resources of the United States, 1899; Metallic Products, Coal, and Coke. Part VI (continued), Mineral Resources of the United States, 1899; Non-metallic Products, except Coal and Coke. -WARD, LESTER F. Geology of the Little Colorado Valley. [From the American Journal of Science, Vol. XII, December, 1901.] [Bulletin No. -WARMAN, PHILIP CREVELING. Catalogue and Index of the Publications of the United States Geological Survey, 1880 to 1901. 177, U. S. Geological Survey.] Washington, 1901. -Washington Academy of Sciences, Proceedings of the. The Algae. Papers from the Harriman Alaska Expedition, XXV. Papers from the Harriman Alaska Expedition, XXVI. Harrimanella, a Papers from the Hopkins-Stanford Galapagos Expedition, 1898-9. Papers from the Hopkins-Stanford Galapagos Expedition, 1898–9, —WOODWORTH, J. B. The History and Conditions of Mining in the Richmond Coal-Basin, Virginia. [Transactions of the American Institute of Mining Engineers (Richmond Meeting, February 1901).] -WRIGHT, FRED. EUGENE. Die Foyaitisch-Theralthischen Eruptivegesteine der Insel Cabo Frio, Rio de Janeiro, Brasilien. [Tschermak's Mineralog, und petrographische Mittheilungen, Bd. XX, Heft 3.] Alfred Hölder, Rothenthurmstrasse 15, Wien. INDEX TO VOLUME IX. Adams, Frank Dawson. Excursion to the Pyrenees in Connection with Eighth - - Agriculture, Department of, for 1900, Year Book of the United States. R. D. S. - Alpen, Die vierte Eiszeit im Bereiche der. Von Albrecht Penck. Review by PAGE 28 363 409 199 202 536 Ammonite-Genus from the Lower Carboniferous, Prodromites, A New. James 255 Anthracite Coal Field, Stratigraphical succession of the Fossil Floras of the Charles R. Keyes 544 694 Arkansas, Physiography of the Boston Mountains. A. H. Purdue 694 Arkansas Valley, Composite Genesis of, Through the Ozark Highlands. Charles Bain, H. F., Review of Annual Report for 1900. Iowa Geological Survey Basis for Geologic Mapping, The Formation as the. Edwin C. Eckel Beach Structures in the Medina Sandstone. H. L. Fairchild. N. M. F. 547 276 708 737 Review by 549 551 Beaufort's Dyke off the Coast of the Mull of Galloway. H. G. Kinahan. Review by N. M. F. - |