GRADED SURFACES 609 



The neighbor ; the natural history of human contacts. Boston and New 

 York. 

 1905. Man and the earth. New York, 1905. 



After the memorials had been read the report of the Photograph Com- 

 mittee was deferred and the Secretary made sundry announcements 

 regarding registration, luncheon, and division into sections for the read- 

 ing of papers, on account of the long program. He stated that when the 

 Society adjourned, adjournment would be to 9.30 o'clock Friday morning, 

 at the American Museum of Natural History. 



P. J. H. Merrill announced that the annual dinner of the Society 

 would be held Friday, December 28, at 7.00 o'clock p m, at the "Arena" 

 restaurant, 29 and 31 West Thirty-first street. 



The Auditing Committee having raised the question as to the custody 

 of the bonds belonging to the Society, the Acting President ruled, in the 

 absence of Treasurer-elect Clark, that the securities were in the care of 

 the Treasurer. 



The Acting President then called for the reading of scientific papers. 

 The first two papers on the printed program were read by title. They 

 were 



CUTTING OF THE MISSISSIPPI AND MISSOURI RIVER GORGES 

 BY N. M. FENNEMAJf 



LATERAL EROSION ON SOME MICHIGAN RIVERS 

 BY MARK S. W. JEFFERSON 



This paper is printed as pages 333-350 of this volume. 



GRADED SURFACES 

 BY F. P. QULUVEB 



[Ahstract] 



This paper called attention to the need felt by the writer and others 

 for a general term to use in physiographic descriptions for every "nearly 

 level surface produced in the past or being now formed by some process 

 of aggradation or degradation." 



The writer showed that in a recent study of the complicated land forms 

 of central Pennsylvania, as seen on a horseback trip with a pupil, no 

 general term could be found to use for any given observed form without 

 implying some hypothesis in regard to the origin of said land form. For 

 purposes of reconnaissance study, there is a great need of some such 

 general form term that will imply no genetic hypothesis in regard to its 



