RECENT FUBLICATIONS 
—Agricultural Journal, published by the Department of Agriculture, Cape of 
Good Hope, August 1899. 
—Baur. G., and Case, E. C. The History of the Pelycosauria, with a 
Description of the Genus Dimetrodon, Cope. Reprinted from the Trans- 
actions of the American Philosophical Society, Vol. XX. 
— BEECHER, CHARLES EMERSON. The Origin and Significance of Spines. 
A Study in Evolution. Am. Jour. Sci., July to October, Vol. VI, 1898. 
—Crospy, W. 0. Geology of the Wachusett Dam and Wachusett Aqueduct 
Tunnel of the Metropolitan Water Works in the Vicinity of Clinton, 
Mass. Reprinted from the Technology Quarterly, Vol. XII, No. 2, June 
1899. 
Archean-Cambrian Contact near Manitou, Colorado. Bull. Geol. Soc. 
Amer., Vol. 10, pp. 141-164, Pls. 14-18. Rochester, March 1899. 
— Dana, Epwarp S._ First Appendix to the Sixth Edition of Dana’s System 
of Mineralogy. John Wiley & Sons, New York, 1899. 
—Day, Davip T. Summary of the Mineral Production of the United States. 
in 1898. Extract from the Twentieth Annual Report of the Survey, 
1898-9, Part VI. Washington, 1899. 
—DeE LORENZO, GUISEPPE. Reliquie di Grandi Laghi Pleistocenici Nell” 
Italia Meridionale. Napoli, 1808. 
—DumBLE, E. T. Notes on the Geology of Sonora, Mexico. From the 
Transactions of the American Institute of Mining Engineers, New York 
Meeting, February 1899. 
— DryYGALSKI, Dr. ErRIcH. Die Eisbewegung, ihre physikalischen Ursachen. 
und ihre geographischen Wirkungen. Abdruck aus Dr. A. Petermanns. 
Geogr. Mitteilungen, 1898. Heft III. Berlin, 1899. 
—FIsHER, Rev. O. On the Residual Effect of a Former Glacial Epoch 
upon Underground Temperature. Philosophical Magazine for July 
1899. 
—Geological Survey of Georgia. Clays of Georgia. By George E. Ladd, 
Ph.D., Assistant State Geologist. Atlanta, 1899. 
—Geological Survey of Western Australia. Bulletin No. 3. The Geology 
of the Coolgardie Gold Field. By Torrington Blatchford, B.A., F. G. S-. 
Assistant Government Geologist. Perth, 1899. 
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