ECONOMICAL GEOLOGY. 129 



of Judge Goffe, at East Creek ; but I have not seen or 

 heard of any others. 



§ There are large quantities of beautiful washed pebbles 

 and gravel on the shore of Delaware Bay, in Lower Town- 

 ship. It is in considerable demand for graveling tarred or 

 pitched roofs. Two thousand tons have been sent to Phila- 

 delphia, for this purpose, the past year, from the strand 

 below the steamboat landing. 



Wells and j^rings. — Water is found everywhere on the 

 upland at a moderate depth beneath the surface; the ave- 

 rage being not above fifteen feet. The supply of water in 

 such wells, though not very abundant, is sufficient for ordi- 

 nary purposes of household use. By sinking the wells a 

 few feet deeper, the supply is much increased, both in con- 

 stancy and amount. Generally, the water is good, but in 

 some localities it is brackish. The brackish water, as far 

 as I have observed, or been able to learn, is confined to 

 the alluvial uplands of the county. 



The well at Congress Hall, on Cape Island, which was 

 mentioned on page 22 as being thirty feet deep, is twelve 

 feet in diameter. It yields an abundant supply of water, 

 ninety hogsheads a day being pumped from it. The water 

 is good, and soft enough for washing. 



The Artesian well at the United States Hotel is ninety- 

 five feet deep, and eight inches bore. The water rises to 

 within about seven feet of the surface, and is but little 

 lowered even by hard pumping. The water is abundant, 

 and is said to be soft. 



The Artesian well at the Mount Vernon House is eighty- 

 one feet deep, and eight inches in diameter. The water in 

 9 



