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Cherrie, G. K. Notes on Costa Rican Birds. Smithsonian Institution. Pp. 20.
Columbia Daily Calendar for 1892. Boston: Pope Manufacturing Co.
Cowles, Edward. Neurasthenia and its Mental Symptoms. Pp. 105. Reprint,
Cragin, T. W. New Observations on the Genus Trinacromerum, pp. 4; and On a Leaf-bearing Terrane in the Loup Fork, pp. 4. Reprints.
Crummell. Alexander. Africa and America. Springfield, Mass.: Wiley ct Co. Pp. 466.
Drake, S. A. The Battle of Gettysburg. Boston: Lee & Shepard. Pp. 178. 50 cents.
Dufferin, Lady. My Canadian Journal. New York: D. Appleton & Co. Pp. 456. $2. Illustrated.
Findlay, G. Working and Management of an English Railway. Macmillan & Co. Pp. 354. $1.50.
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Furney, E. E. Culture: A Modern Method. New York: L. H. Brown & Co. Pp. 322.
Gilbert. C. H. Apodal Fishes from the Tropical Pacific. Smithsonian Institution. Pp. 6.
Gill, T. On the Genus Labrichthys, etc. Smithsonian Institution. Pp. 9.
Hall and Bergen. A Text-book of Physics. New York: Henry Holt & Co. Pp. 388. $1.25.
Halstead, B. D. Fungi injurious to Fruits and to Garden Crops. Columbus, O.: Westbote & Co. Pp. 13.
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Hopkins, A. A. The Scientific American Cyclopædia of Receipts. Notes, Queries. New York: Munn & Co. Pp. 675. $5.
Jones. Alonzo T. The Two Republics of Rome and the United States of America. Battle Creek, Mich.: Review and Herald Publishing Co. Pp. 895. Illustrated.
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Loewy, Benjamin. A Graduated Course of Natural Science. Part II. New York: Macmillan & Co. Pp. 257. 60 cents. Illustrated.
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McCalley, H., and Gibson, A. M. Report on the Coal Measures of the Plateau Regions of Alabama. Pp. 238, with Maps.
Macfarlane, R. Notes on Birds and Eggs collected in Arctic America. Smithsonian Institution. Pp. 34.
Marble. A. P. Sanitary Conditions for School-houses. Washington: Bureau of Education. Pp. 121, with 45 Plates.
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Remondino, P. C. History of Circumcision. Philadelphia: F. A. Davis. Pp. 346. 50 cents.—An Instructive Case of Uræmia. Pp. 8. Reprint.
Report of the Commissioner of Pensions for the Year ending June 30, 191. Pp. 84.
Report of the New York State Board of Charities for 1890. Pp. 349.
Shaler, N. 8. The Story of our Continent. Boston: Ginn & Co. Pp. 290. 85 cents.
Shaw, G. B. The Quintessence of Ibsenism. Boston: Benjamin R. Tucker. Pp. 170. 25 cents.
Sloane, T. O'Conor, Electricity Simplified. New York: N. W. Henley & Co. Pp. 158. $1. Illustrated.
Smith. J. B. Noctuidæ of Temperate North America. Smithsonian Institution. Pp. 80.
Smith, Oberlin. The Engineer as a Scholar and a Gentleman. Pp. 14. Reprint.
Stejneger, L. On the Snakes of the Genus Lichanpura. Pp. 5.—Description of a New Species of Chameleon. Pp. 2.
Stevenson, J. J. The Chemung and Catskill [Upper Devonian] on the Eastern Side of the Appalachian Basin. Pp. 31. Reprint.
Torrey, Bates. Practical Type-writing. New York: Fowler & Wells. Pp. 156.
Upham, W. Geographic Limits of Species of Plants in the Basin of the Red River of the North. Pp. 32. Reprint.
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Whitney, W. D. Introductory French Reader. New York: H. Holt & Co. Pp. 256. 70 cents.
Yeaman, G. H. The Silver Question. Pp. 27.
Ancient River Channels.—A remarkable contrast in the physical geography of the eastern and western coasts of the American continent is pointed out by Prof. Joseph Le Conte. The continent is bordered on both sides by a submarine plateau sloping gently seaward till it attains a depth of about one hundred fathoms, from which point the bottom drops off rapidly into deep water. This submarine plateau may be regarded as a sub-