oO [Dec. 6, 



identified this high level terrace at points in New Jersey on the south- 

 eastern wall of the Delaware River Valley. 



At the date of this terrace, whether in tertiary or post-tertiary times, tide 

 water must have covered not only Chester and Delaware counties, but 

 broad belts of inland, including the limestone plain of Northampton and 

 Lehigh counties, and the sites of Easton and Bethlehem. 



Professor Prazer has discovered two patches of drift gravel at points in 

 Lancaster county, some miles back from the Susquehanna River, and dis- 

 tant from each other. 



It is therefore probable that at the time of the deposit of these gravels a 

 large part of south-eastern Pennsylvania, and in fact of the whole seaboard 

 of the United States, was at least 400 feet under water. 



Whether or not a greater depth of water can be assigned, may perhaps 

 be settled by the lines of levels now being run by the Geological Survey to 

 determine accurately the heights of the isolated gravel beds, in connection 

 with the study of other parts of the State. 



Mr. Lesley then referred to his discussion of the 1300 foot subsidence of 

 Western Pennsylvania, published in his preface to Professor White's Re- 

 port of Progress on Beaver county, but considered all present generaliza- 

 tions premature for want of sufficiently accurate data in a sufficient number 

 of places. 



It is possible that the remarkable terminal moraine described by the New 

 Jersey geologists, and by Professor Prime, may have had its geographical 

 position determined bj r the border of standing water (ocean) at the time 

 when tide level stood at least 400 feet above its present datum. 



The Annual report of the Treasurer was read. 



Pending nomination No. 871 and new nomination 872 

 were read. 



The Curators reported that the Cabinet of Antiquities 

 had been removed to the Academy of Natural Sciences, on 

 deposit, subject to demand, in accordance with the resolution 

 of November 16, 1877, and receipted for by W. S. W. Rusch- 

 enberger, President of the Academy of Natural Sciences of 

 Philadelphia. 



The Curators reported that the Cabinet of Coins had been 

 removed to the Pennsylvania Museum of Industrial Art in 

 Fairmount Park, on deposit in the custody of the Numis- 

 matic and Antiquarian Society of Philadelphia, subject to 

 demand, in accordance with the resolution of November 

 15, 1878, and receipted for by Henry Phillips, Jr., for that 

 Society. 



