1891.] NEW YORK ACADEMY OF SCIENCES. 29 



U. S. Geological Survey of reports, monographs, maps, reliefs, and 

 pliotographs ; the large collection of Mexican rocks exhibited by 

 ihe delegates from that country ; the remarkable Ordovician fish- 

 remains recently collected and described by Prof. Walcott from near 

 Canon City, which carry back the evidences of fish-life to a horizon 

 corresponding to the Trenton limestone of the Eastern United States ; 

 the illustrations of mountain structure and rock-folding produced by 

 Mr. Bailey Willis, by laterally compressing layers of clay and 

 plaster under heavy weight ; and, of extreme interest, the photo- 

 graphs and specimens of glacial markings in Silurian rocks, exposed 

 to view by the removal of overlying beds in Scandinavia, and ap- 

 parently affording clear evidence of an early Paleozoic ice period. 

 The several days' programs were referred to further ; the ex- 

 haustive classification by Prof. Chamberlain of quaternary deposits, 

 introductory to the discussion of that subject; the second day's 

 topic of Geological Correlation, and the views of leading specialists, 

 both American and foreign, as to the methods, principles, and 

 possibilities in that great field; and, later, the subject of Geological 

 Cartography, with a descrii)tion of Major Powell's account of the 

 comprehensive and elaborate scheme of combined colors and patterns 

 adopted for the extensive work of the U. S. Geological Survey. 

 This Prof. Martin illustrated with blackboard drawings and one of 

 the new survey maps. 



Meeting adjourned. 



November 16, 1891. 

 Stated Meeting. 



Mr. p. H. Dudley in the chair. About seventy-five persons pre- 

 sent. 



The minutes of the previous meeting (November 9th) were read 

 and approved. 



Professor Henry F. Osborn, of Columbia College, was pro- 

 posed as a Resident Member by Dr. N. L. Britton. 



Prof. Otis T. Mason, of Washington, D. C, was then intro- 

 duced and delivered a lecture entitled 



Woman's Part in the Earlier Civilizations, 



illustrated by numerous lantern slides. 



At the close of the discourse a vote of thanks was extended to 

 the lecturer, and the meeting adjourned. 



