RECENT PUBLICATIONS 
—ABB0T, C. G. AND Fow LE, F. E., Jk. Note on the Reflecting Power of Clouds. 
[Addenda to Annals of the Astrophysical Observatory, Smithsonian Institu- 
tion, Vol. II. Washington, May 27, 1908.] 
—Apams, CHARLES C. The Ecological Succession of Birds. [From The Auk, 
. Vol. XXV, No. 2, April, 1908.] 
—AGassiz, ALEXANDER. Reports on the Scientific Results of the Expedition to 
the Tropical Pacific, in Charge of Alexander Agassiz, by the U. S. Fish Com- 
mission Steamer ‘‘Albatross,’ from August, 1899, to March, 1900. Com- 
mander Jefferson F. Moser, U. S. N., Commanding. XI. Echini. The 
Genus Colobocentrotus. [Memoirs of the Museum of Comparative Zoélogy 
at Harvard College, Vol. XXXVI, No. 1. Cambridge, November, 1908.] 
—ALLEN, E. T. AND WuiTE, W. P. Diopside and Its Relations to Calcium and 
Magnesium Metasilicates. With Optical Study, by F. E. Wright and E. S. 
Larsen. [American Journal of Science, Vol. XXVII, January, 1909.] 
—ALLEN, E. T. AND CLEMENT, J. K. The Réle of Water in Tremolite and Cer- 
tain Other Minerals. [From the American Journal of Science, Vol. XXVI, 
August, 1908.] 
—American Association for the Advancement of Science, Proceedings of the 
Fifty-sixth and Fifty-seventh Meetings held at Ithaca, N. Y., June 28 to 
July 3, 1906, and New York City, N. Y., December 27, 1906, to January 2, 
1907. [Washington, 1907.] 
—ANDERSON, C. W. Map of the Northern Portion of British Guiana. Showing 
the Geology of the Courses of the Principal River and Auriferous Areas. 
[Department of Lands and Mines. Georgetown, 1908.] 
—AnpDREws, E. C. The Geographical Significance of Floods, with Especial 
Reference to Glacial Action. [From the Proceedings of the Linnean Society 
of New South Wales, 1907, Vol. XX-XII, Part 4, October 30. Issued March, 
1908. | 
Report on the Drake Gold and Copper Field. [Mineral Resources. No. 
12. Geological Survey, Department of Mines and Agriculture. New South 
_ Wales. Sydney, 1908.] 
—ARENTZ, F. Hardangervidda. A Treatise on Mountain-making in Norway. 
[Archiv for Mathematik og Naturvidenskab, B. XXIX, Nr. 10. Kristiania, 
1908. | 
Kontaktmetamorphismus und Piézokristallisation des Dr. Ernst Wein- 
schenk. Versuch zur Kritik. [Archiv for Mathematik og Naturvidenskab, 
B. XXIX, Nr. 9. Kristiania, 1908.] 
Mountain-making in the Alps. [Archiv for Mathematik og Natur- 
videnskab, B. XXIX, Nr. 8. Kristiania, 1908.] 
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