F. D. Chester—Bowlder Drift in Delaware. 21 
the melting ice-floats, while the slightly stratified arrangement 
of the sand and gravel for not more than a foot in the topmost 
layer of the cuttings would show a slightly modifying effect of 
the waters into which the debris was dropped. It was only in 
two localities that this stratification of the surface could be 
trae of all parts of the uppermost material. 
Professor G. H. Cook (Ann. Rept. of N. J., 1880, p. 94) 
mentions the occurrence of bowlders in Cape May County, 
‘ew Jersey, near the town of Dennisviile. He gives the 
dimensions of the largest one found in that part of the State as 
fourteen feet, and its other dimensions eleven to seventeen 
inches, by thirteen to sixteen inches. These figures may make 
some readers skeptical as to those already given, yet their 
to twelve miles from the river, and with different geological 
surroundings. The tracing also of sand and gravel, similar in 
character to that found in the hills, for some distance due north, 
would also seem to indicate that the floating ice was not alone 
confined to even the ancient channel of the Delaware River. 
ether the great height of these hills above the level of 
the Delaware would not seen to indicate a greater submergence 
of the land during the Champlain period than is reckoned for 
this locality, will be a question worthy of consideration, pro- 
vided future evidence shall strengthen the theory. 
Delaware College, Newark, Delaware, Dec. 8, 1882, 
