470 PROCEEDINGS OF THE ACADEMY OF [1892' 



To this I have added, in my volume on the Ice Age referred to, 

 the statement that in driving over the country, between New 

 Brunswick and Metuchen, N. J., in company with Professor Cook, 

 I had observed what I considered unmistakable evidence of this 

 fringe a few miles south of the well defined moraine. (Ice Age, 

 p. 136.) 



So much it is proper to say to indicate the reasons urging me to 

 re-examine the field where Professor Lewis and I began work on the 

 glacial boundary. This is the more important since Professor 

 Lewis's death has left unpublished a large amount of material in 

 the hands of his executors, which is at present inaccessible. This 

 consists of notes collected upon the terraces of the Atlantic rivers, 

 which he expected soon to publish, and to which he makes occa- 

 sional reference in Vol. Z, as discussing more fully many topics 

 barely alluded to in that report. Of his views I had much knowl- 

 edge, from our constant association in the field. For some 

 time past reports of phenomena, seemingly inconsistent with the 

 interpretation which we had put upon the facts, have been gaining 

 currency, but I have not dared to venture any criticism until a 

 personal re-examination of the field had been made. This I have 

 had the opportunity of doing duriug the past season, and I herewith 

 submit the results for consideration and criticism. 



The principal statements which had perplexed me Avere : — 



1st, That of Mr. McGee (Am. Jour. Sci., vol. 135, pp. 377, 378, 

 381), that from Harrisburgto the terminal moraine at Berwick there 

 are evidences of a submergence during glacial times, which allowed 

 still water deposits to accumulate 500 feet above the present river 

 level. 



2d, That of Professor Salisbury, that glaciated stones had been 

 found by him near Sunbury, 600 feet above the river. ( Adduced 

 by President Chamberlin, Bui. Geol. Soc, vol. I, p. 473. Reitera- 

 ted by Salisbury, vol. 3, p. 180.) 



3d, Statements of Mr. McGee that there is evidence of a land sub- 

 mergence in the Delaware Valley of at least 400 feet in the vicinity 

 of the terminal moraine. The evidence of this is principally drawn 

 from a section of the valley five miles below Belvidere. (Am. 

 Jour. Sci., vol. 135, p. 379.) 



4th, Statements by Professor Salisbury, seeming to imply that evi- 

 dences of ice occupation are found in New Jersey at High Bridge, 

 Pattenburg and Monmouth Junction, and in Pennsylvania at Falls- 



