108 ARTESIAN WELLS ON THE ATLANTIC COAST. [bull. 138. 
The well at the glass works at Winslow, which was sunk to a depth 
of 345 feet, is thought by Mr. Woolman to have reached water of the 
950-foot horizon at Atlantic City, which would indicate a wide exten- 
sion of that horizon and a dip of 23 feet per mile. 
POST-CHESAPEAKE HORIZONS. 
There are a number of bored wells in southern New Jersey which 
yield satisfactory water supplies from beds more recent in age than the 
Chesapeake formation. They are relatively shallow, and their waters 
are in some degree liable to surface contamination. Owing to our lack 
of knowledge of the relations of the younger formations in southern 
New Jersey, it has not always been possible to determine the age of 
some of the shallower water-bearing beds. 
WELL PROSPECTS IN THE VARIOUS COUNTIES OF SOUTHERN NEW 
JERSEY. 
ATLANTIC COUNTY. 
The many wells in this county and the wide range in their depths 
afford very satisfactory data as to the prospects for additional wells. 
The entire county is underlain by water-bearing beds of the Chesapeake 
formation, which increase in number to eight in the eastern end of the 
county. I believe that a clear idea of the relations of these beds will 
be obtained from sections 3 and 5 in PI. III. There is considerable 
probability, also, that the waters of the Cretaceous beds extend to the 
western edge of the county, as suggested in the map, PI. II, but as 
there are other waters at higher horizons it may never be necessary to 
go to the deeper ones for water supply. 
The principal water horizons in the county are those which occur at 
about 525, 700, and 800 feet at Atlantic City, and at approximately the 
same depths at Ocean City. The 525-foot horizon is only 50 feet below 
the surface about Weymouth, and it probably outcrops under the 
superficial deposits along the western border of the county. It is 
thought that the 950-foot horizon of the Atlantic City wells furnishes 
water at Winslow at a depth of 335 feet, and if this is the case, three 
horizons of water may be expected throughout the western portion 
of the county between the depths of 50 and 400 feet in the vicinity of 
Weymouth, Eichland, Elwood, and Pleasant Mills. They dip almost 
due southeast at the rate of 22 feet per mile. In the eastern portion 
of the county the waters found in the wells at Atlantic City and Ocean 
City may be expected at depths which diminish at the rate of 22 feet 
to the mile to the northwest. 
CAPE MAY COUNTY. 
The experience of the Ocean City well indicates that the great water 
horizons of Atlantic City may be expected to extend at least for some 
distance under Cape May County, and it is probable that some of them 
