612 PROCEEDINGS OF WASHINGTON MEETING. 



The last paper of the afternoon session was — 



POST-PLIOCENE SUBSIDENCE VERSUS GLACIAL DAMS. 

 BY J. W. SPENCER, 



This was discussed by G. K. Gilbert. It is printed as pages 465-476, 

 with plate 19, of this volume. 



The Society adjourned, to meet at 8 o'clock p. m., in the same place. 



Evening Session, Monday, December 29. 

 The Society convened at 8 p. m.. President Winchell in the chair. 

 The first paper of the evening was entitled : 



illustrations of the structure of glacial sand-plains. 



BY W. M. DAVIS AND H. L. RICH, 



Professor Davis described the form and structure of ejlacial sand-plains, and illus- 

 trated his remarks by a series of lantern views made from photographs taken by Mr. 

 H, L, Kich, of Auburndale, Massachusetts, who has been associated with him in the 

 study of these deposits during the past year. The text of Mr. Davis' remarks is given 

 in his paper on this subject, read by title only at the New York meeting and pub- 

 lished in the Bulletin volume 1, pages 195-202, plate 3. 



The second paper of the evening was — 



glaciers of the ST. ELIAS region, ALASKA. 

 BY, I, C. RUSSELL, 



The glaciers of the St, Elias range and of the foothills and lowlands between the 

 range and the Pacific ocean were described and illustrated. The glaciers were classi- 

 fied as (1) Alpine glaciers, or ice-rivers of the usual type; and (2) Piedmont glaciers, 

 or broad ice-sheets lying at the bases of mountains and formed by the confluence of 

 Alpine glaciers ; and both classes were discriminated from continental glaciers. 



The paper was illustrated by lantern views. It is published in full, with other mat- 

 ter, in The National Geographic Magazine, volume III, 1891, pages 53-204, plates 

 2-20, 



The Society adjourned to meet in the same place on Tuesday, December 

 30, at nine o'clock a. m. 



