322 ANNALS NEW YORK ACADEMY OF SCIENCES 



memorative exercises of the two hundredth anniversary of the birth of 

 Linnaeus, and the Secretary gave a summary of the proposed program. 



Dr. G. F. Kunz informed the Academy of the death of Henri Moissan, 

 Honorary Member, and a Committee was elected, consisting of Messrs. 

 G. F. Kunz, R. S. Woodworth, C. F. Chandler, J. F. Kemp and E. O. 

 Hovey, to draw up suitable resolutions. 

 The Academy then adjourned. 



Edmund Otis Hovey, 



Recording Secretary. 



SECTION OF GEOLOGY AND MINERALOGY. 



March 4, 1907. 



Section met at 8: 30 P. M., Vice-President Grabau presiding. 



The minutes of the last meeting of the Section were read and approved. 



The session was devoted to a description of Letchworth Park (Glen 

 Iris), the new State Reservation on the Genesee River, New York, recently 

 presented to the State of New York by Mr. William Pryor Letchw^orth, and 

 the following papers were presented: 



A. W. Grabau, The Scenery and Geology of the Gorges and Falls. 

 George F. Kunz, The Plan of Development of the Park as a Means 



FOR Scientific Education. 



Summary of Papers. 



In the first part of his paper, Professor Grabau discussed studies made 

 by him for some years on the drainage systems of central New York in 

 preglacial time. It was pointed out that all the characteristics of the ancient 

 valleys indicate a southward drainage in late Tertiary time. In all cases 

 where the valleys are traceable they unite southward into trunk streams, 

 a condition wholly inexplicable on the supposition that these valleys were 

 formed by northward-flowing streams. This is readily seen by an inspec- 

 tion of the topographic sheets as well as of the magnificent geologic sheets 

 of this section recently published by the state survey. Where the connection 

 is broken, this can generally be showTi to be due to drift deposits. 



The following drainage systems were tentatively outlined, the outline 

 being presented as a report of progress rather than as a final settlement in 

 any one case: 



