664 



SCIENCE. 



[N. S. Vol. XV. No. 382. 



standing committees, trust funds, etc., and 

 reading scientific papers. 



Mr. Samuel F. Emmons, of Washington, 

 D. C, was elected treasurer of the Academy in 

 place of Mr. C. D. Walcott, resigned. 



The following gentlemen were elected mem- 

 bers of the Academy: William W. Campbell, 

 Director of Lick Observatory, Mount Hamil- 

 ton, California; George E. Hale, Director of 

 Yerkes Observatory, Williams Bay, Wiscon- 

 sin ; 0. Hart Merriam, Chief of the Division of 

 Biological Survey, U. S. Department of Agri- 

 culture, Washington, D. C. ; William Trelease, 

 Director of the Missouri Botanical Garden, St. 

 Louis; Charles R. Van Hise, Professor of 

 Geology, University of Wisconsin, Madison. 



I'he Academy will next meet in Baltimore 

 on November 11. 



The scientific program was as follows : 



' EvoKition of the Titanotheres, III.,' Models and 

 Restorations: Heney F. Osboen. 



' Homoplasy and Latent Homology ; A Correc- 

 tion ' : Henry F. Osbobn. 



' Evidence that North America and Eurasia Con- 

 stituted a Single Zoological Realm during the 

 Mesozoic and Cenozoic, and that Correlations can 

 be Established as a Basis for Uniformity of Geo- 

 logical Nomenclature ' : Henry F. Osborn. 



' Monograph of the Bombycine Moths of Amer- 

 ica, including their Transformation ; with a Revis- 

 ion of the Known Genera, Part III., Sphingi- 

 campidse ' : Alpheus S. Packard. 



' On the Coral Reefs of the Maldives ' : Alex- 

 ander Agas.siz. 



' On the Tlieory of the Formation of Coral 

 Reefs ' : Alexander Agassiz. 



' Psychophysical Fatigue ' : J. McK. Cattell. 



' On Some Optical Properties of Asphalt ' : 

 Edward L. Nichols. 



' The Classification of the Sciences '; Charles 

 Peiece. 



' The Postulates of Geometry ' : Charles S. 

 S. Peirce. 



' The Color System ' : Charles S. Peirce. 



' The Compulsory Introduction of the French 

 Metrical System into the United States ' : Wil- 

 liam Sellers. 



' The Disintegration of Comets ' : Asaph Hall. 



'A New Computation of the Coefficients of Pre- 

 cession and Nutation ' : : Ira Ibsen Sterner. In- 

 troduced by Asaph Hall. 



' The Distribution of the Stars ' : E. C. Picker- 

 ing. 



' The Variability in Light of Eros ' : B.C. 

 Pickering. 



' The Physiological Station on Monte Rosa ' : H. 

 P. Bowditch. (With lantern illustrations.) 



' On Catalysis ' : James M. Crafts. 



' The Atomic Weight of Caesium ' ; T. W. Rich- 

 ards. 



' The Significance of Changing Atomic Volume ' : 

 T. W. Richards. 



' Determination of the Weight of the Vapor of 

 Mercury at Temperature Below 100° ' : Edward 



W. MORLEY. 



' Biography of Professor William A. Rogers ' : 

 Arthur Searle. Presented by Edward W. Morley. 



' Biographical Memoir of General J. G. Bar- 

 nard ' : Henry L. Abbot. 



' Biographical Memoir of General Francis A. 

 Walker': John S. Billings. 



' Biographical Memoir of J. S. Newberry ' : C. A. 

 White. 



' The Present Aspect of Our Knowledge as to the 

 Constant of Aberration ' : S. C. Chandler. 



THE GEOLOGICAL SOCIETY OF WASHINGTON. 



At the meeting of the Society on March 26 

 the first paper, by Mr. M. L. Fuller, was 

 entitled 'The Catskill Rocks in Northern 

 Pennsylvania.' The term Catskill was used 

 by the speaker to indicate the great series of 

 shales and sandstones, predominantly red in 

 color, which constitute the upper portion of 

 the Devonian sediments in Pennsylvania and 

 New York. The progressive rise of the plane 

 of the lowest red beds to the westward was 

 shown by sections. In the Catskill mountains 

 the lower red beds rest upon the Hamilton, 

 while in Columbia County, Pennsylvania, 

 they appear only after some 1,850 feet of 

 Ithaca and 450 feet of Chemung beds had 

 been deposited. Again, near Tioga, Pennsyl- 

 vania, 1,500 to 2,000 feet or more of Chemung 

 rocks are exposed beneath the red beds with- 

 out the bottom being shown, while still fur- 

 ther west, near Salamanca, New York, the red 

 beds occur within an interval of some 250 

 feet below the Olean conglomerate (Potts- 

 ville?). At the same time the thickness of 

 the red division has decreased from nearly 

 5,000 feet in Columbia County, Pennsylvania, 

 to practically nothing in the northwestern 

 portion of the Salamanca quadrangle in New 

 York. 



