146 ARTESIAN WELLS ON THE ATLANTIC COAST. [bull. 138. 
The water horizon is found at a depth of 100 feet at the Nuinsen Can 
Company, near the foot of West street, and probably the same water 
is found in the 115-foot well at Woodhall's, at the foot of Allen street, 
where it is reported to be in gravel under white clay. At the packing 
establishment of C. H. Pearson & Co. water is obtained in sands from 
80 to 102 feet below the surface, at a somewhat higher horizon, proba- 
bly, than the one that yields water at 60 feet at the Numsen Can Com- 
pany, on West street. The record of the Pearson well is as follows: 
Feet. 
0-8 shells. 
8-15 mud. 
15-22 nmd with shells and gravel. 
22-30 red clay. 
30-45 white clay. 
45-60 sandy white clay. 
60-65 sand-rock. 
65-80 white impervious clay. 
80-102 water-hearing white sand. 
This water is also found at the works of the Warren Company, near 
the foot of Fort avenue, and in the well at Fort McHenry, all at a 
depth of 145 feet. It is probably the C horizon found on the other side 
of the harbor, at about the same depth, in the well at the Maryland 
Fertilizer Works. 
Probably the B and C horizons underlie all of the Locust Point 
region, and the A horizon in the basal beds may possibly occur at some 
localities to the southeastward of the Federal Hill region. 
On the Ferry Point peninsula there are a few widely scattered wells, 
which, however, indicate that the favorable conditions in Canton and 
on Locust Point continue to the westward. The group of wells near 
old Fort Covington, at the eastern foot of Donaldson street, obtain 
abundant waters at three main horizons, 55, 122, and 160 feet below 
the surface, apparently in the C, B, and A horizons. The waters from 
54 to 69 feet prove to be unsatisfactory in quality, as they did also at 
the roundhouse of the Baltimore and Ohio Railroad, a few blocks north- 
west. The deeper waters give no scale in the boiler and are in large 
supply. The well of the Thompson Chemical Works, at the west foot 
of Wincer street, on the opposite side of the peninsula, obtains abun- 
dant water supply at a depth of 103 feet, probably from the B horizon. 
The well on the Light street drawbridge has a depth of 180 feet and 
furnished much water, but it was unsatisfactory for boilers, and the 
well is now abandoned. The water was probably from the A or basal 
Potomac horizon. 
Basal Potomac waters are found in wells 45 feet deep on the corner 
of Ostend and Sharp streets, and also at the Hannis distillery, where 
the quantity is large and the quality apparently good, but probably 
there is some surface contamination in these shallow wells. 
Between the Basin and Ridgeley Cove a number of attempts have 
been made to obtain water from the crystalline rocks with varying 
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