56 
ARTESIAN WELLS ON THE ATLANTIC COAST. 
[BULL. 138. 
The well at Cooper Hospital was sunk in 1885 and a supply of water 
was obtained at 129 feet. It is a G-incli pipe and the water rises to 
within 16 feet of the surface. It is estimated to yield 25,000 gallons 
per day. The following analysis is given : l 
Analysis of water from well at Cooper Hospital, Camden, N. J. 
Sulphate of lime 
Carbonate of lime 
Carbonate of magnesia 
Chloride of sodium 
Sesquioxide of iron and alumina 
Silica 
Organic and volatile matter 
Total solids 
Grains p.er 
gallon. 
1.76 
0.77 
0.83 
0.30 
0.07 
0.54 
0.46 
4.73 
It is a soft and good water. 
The following materials are penetrated : l 
Feet. 
0-4 sand and soil . 
4-10 molding clay and sand. 
10-12 white gravel with water. 
12-20 sand. 
20-26 soft clay. 
26-28 soft ironstone. 
28-30 potters' clay. 
30-34 black clay and mud, with fragments of wood. 
34-40 soft pink clay. 
40-68 white sand, white gravel (large stone). 
68-78 white gravel. 
78-80 red gravel. 
80-95 yellow gravel and sand (water). 
95-120 white sand and gravel. 
120-123 red gravel, with 3 inches of white clay. 
123-126 red gravel, with 1 or 2 inches of white clay. 
126-129 white gravel. 
The water horizon is in or near the basal beds of the Earitan forma- 
tion, apparently the same as that which supplies the well at 174 feet at 
Pavonia, 130 feet at Stockton, and the deep well at Gloucester. 
A 6-inch well was recently bored at the Camden pumping station, 
on the Delaware River, near the foot of Fulton street. It is on tide 
meadow, and considerably below the wells above described. Its record 
is given by Mr. Woolman 2 as follows : 
Feet. 
0-39 hlack river mud. 
39-49 yellow and red mottled plastic clay. 
49-72 red clay. 
1 New Jersey report for 1885, p. 125. 
2 New Jersey report for 1894, pp. 197-198. 
